![Michal Hocko](/assets/img/avatar_default.png)
show_mem() allows to filter out node specific data which is irrelevant to the allocation request via SHOW_MEM_FILTER_NODES. The filtering is done in skip_free_areas_node which skips all nodes which are not in the mems_allowed of the current process. This works most of the time as expected because the nodemask shouldn't be outside of the allocating task but there are some exceptions. E.g. memory hotplug might want to request allocations from outside of the allowed nodes (see new_node_page). Get rid of this hardcoded behavior and push the allocation mask down the show_mem path and use it instead of cpuset_current_mems_allowed. NULL nodemask is interpreted as cpuset_current_mems_allowed. [akpm@linux-foundation.org: coding-style fixes] Link: http://lkml.kernel.org/r/20170117091543.25850-5-mhocko@kernel.org Signed-off-by: Michal Hocko <mhocko@suse.com> Acked-by: Mel Gorman <mgorman@suse.de> Cc: Hillf Danton <hillf.zj@alibaba-inc.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
424 lines
9.2 KiB
C
424 lines
9.2 KiB
C
/*
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* linux/arch/sparc/kernel/setup.c
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*
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* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
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* Copyright (C) 2000 Anton Blanchard (anton@samba.org)
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*/
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/stddef.h>
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#include <linux/unistd.h>
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#include <linux/ptrace.h>
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#include <linux/slab.h>
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#include <linux/initrd.h>
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#include <asm/smp.h>
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#include <linux/user.h>
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#include <linux/screen_info.h>
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#include <linux/delay.h>
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#include <linux/fs.h>
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#include <linux/seq_file.h>
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#include <linux/syscalls.h>
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#include <linux/kdev_t.h>
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#include <linux/major.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/console.h>
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#include <linux/spinlock.h>
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#include <linux/root_dev.h>
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#include <linux/cpu.h>
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#include <linux/kdebug.h>
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#include <linux/export.h>
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#include <linux/start_kernel.h>
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#include <asm/io.h>
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#include <asm/processor.h>
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#include <asm/oplib.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#include <asm/traps.h>
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#include <asm/vaddrs.h>
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#include <asm/mbus.h>
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#include <asm/idprom.h>
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#include <asm/cpudata.h>
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#include <asm/setup.h>
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#include <asm/cacheflush.h>
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#include <asm/sections.h>
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#include "kernel.h"
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struct screen_info screen_info = {
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0, 0, /* orig-x, orig-y */
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0, /* unused */
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0, /* orig-video-page */
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0, /* orig-video-mode */
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128, /* orig-video-cols */
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0,0,0, /* ega_ax, ega_bx, ega_cx */
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54, /* orig-video-lines */
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0, /* orig-video-isVGA */
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16 /* orig-video-points */
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};
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/* Typing sync at the prom prompt calls the function pointed to by
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* romvec->pv_synchook which I set to the following function.
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* This should sync all filesystems and return, for now it just
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* prints out pretty messages and returns.
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*/
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/* Pretty sick eh? */
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static void prom_sync_me(void)
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{
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unsigned long prom_tbr, flags;
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/* XXX Badly broken. FIX! - Anton */
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local_irq_save(flags);
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__asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr));
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__asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
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"nop\n\t"
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"nop\n\t"
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"nop\n\t" : : "r" (&trapbase));
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prom_printf("PROM SYNC COMMAND...\n");
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show_free_areas(0, NULL);
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if (!is_idle_task(current)) {
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local_irq_enable();
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sys_sync();
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local_irq_disable();
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}
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prom_printf("Returning to prom\n");
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__asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
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"nop\n\t"
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"nop\n\t"
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"nop\n\t" : : "r" (prom_tbr));
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local_irq_restore(flags);
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}
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static unsigned int boot_flags __initdata = 0;
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#define BOOTME_DEBUG 0x1
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/* Exported for mm/init.c:paging_init. */
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unsigned long cmdline_memory_size __initdata = 0;
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/* which CPU booted us (0xff = not set) */
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unsigned char boot_cpu_id = 0xff; /* 0xff will make it into DATA section... */
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static void
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prom_console_write(struct console *con, const char *s, unsigned int n)
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{
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prom_write(s, n);
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}
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static struct console prom_early_console = {
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.name = "earlyprom",
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.write = prom_console_write,
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.flags = CON_PRINTBUFFER | CON_BOOT,
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.index = -1,
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};
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/*
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* Process kernel command line switches that are specific to the
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* SPARC or that require special low-level processing.
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*/
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static void __init process_switch(char c)
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{
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switch (c) {
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case 'd':
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boot_flags |= BOOTME_DEBUG;
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break;
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case 's':
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break;
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case 'h':
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prom_printf("boot_flags_init: Halt!\n");
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prom_halt();
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break;
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case 'p':
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prom_early_console.flags &= ~CON_BOOT;
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break;
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default:
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printk("Unknown boot switch (-%c)\n", c);
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break;
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}
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}
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static void __init boot_flags_init(char *commands)
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{
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while (*commands) {
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/* Move to the start of the next "argument". */
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while (*commands && *commands == ' ')
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commands++;
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/* Process any command switches, otherwise skip it. */
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if (*commands == '\0')
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break;
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if (*commands == '-') {
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commands++;
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while (*commands && *commands != ' ')
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process_switch(*commands++);
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continue;
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}
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if (!strncmp(commands, "mem=", 4)) {
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/*
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* "mem=XXX[kKmM] overrides the PROM-reported
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* memory size.
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*/
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cmdline_memory_size = simple_strtoul(commands + 4,
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&commands, 0);
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if (*commands == 'K' || *commands == 'k') {
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cmdline_memory_size <<= 10;
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commands++;
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} else if (*commands=='M' || *commands=='m') {
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cmdline_memory_size <<= 20;
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commands++;
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}
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}
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while (*commands && *commands != ' ')
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commands++;
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}
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}
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extern unsigned short root_flags;
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extern unsigned short root_dev;
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extern unsigned short ram_flags;
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#define RAMDISK_IMAGE_START_MASK 0x07FF
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#define RAMDISK_PROMPT_FLAG 0x8000
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#define RAMDISK_LOAD_FLAG 0x4000
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extern int root_mountflags;
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char reboot_command[COMMAND_LINE_SIZE];
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struct cpuid_patch_entry {
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unsigned int addr;
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unsigned int sun4d[3];
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unsigned int leon[3];
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};
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extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end;
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static void __init per_cpu_patch(void)
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{
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struct cpuid_patch_entry *p;
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if (sparc_cpu_model == sun4m) {
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/* Nothing to do, this is what the unpatched code
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* targets.
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*/
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return;
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}
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p = &__cpuid_patch;
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while (p < &__cpuid_patch_end) {
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unsigned long addr = p->addr;
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unsigned int *insns;
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switch (sparc_cpu_model) {
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case sun4d:
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insns = &p->sun4d[0];
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break;
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case sparc_leon:
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insns = &p->leon[0];
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break;
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default:
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prom_printf("Unknown cpu type, halting.\n");
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prom_halt();
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}
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*(unsigned int *) (addr + 0) = insns[0];
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flushi(addr + 0);
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*(unsigned int *) (addr + 4) = insns[1];
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flushi(addr + 4);
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*(unsigned int *) (addr + 8) = insns[2];
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flushi(addr + 8);
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p++;
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}
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}
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struct leon_1insn_patch_entry {
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unsigned int addr;
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unsigned int insn;
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};
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enum sparc_cpu sparc_cpu_model;
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EXPORT_SYMBOL(sparc_cpu_model);
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static __init void leon_patch(void)
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{
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struct leon_1insn_patch_entry *start = (void *)__leon_1insn_patch;
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struct leon_1insn_patch_entry *end = (void *)__leon_1insn_patch_end;
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/* Default instruction is leon - no patching */
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if (sparc_cpu_model == sparc_leon)
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return;
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while (start < end) {
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unsigned long addr = start->addr;
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*(unsigned int *)(addr) = start->insn;
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flushi(addr);
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start++;
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}
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}
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struct tt_entry *sparc_ttable;
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static struct pt_regs fake_swapper_regs;
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/* Called from head_32.S - before we have setup anything
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* in the kernel. Be very careful with what you do here.
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*/
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void __init sparc32_start_kernel(struct linux_romvec *rp)
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{
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prom_init(rp);
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/* Set sparc_cpu_model */
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sparc_cpu_model = sun_unknown;
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if (!strcmp(&cputypval[0], "sun4m"))
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sparc_cpu_model = sun4m;
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if (!strcmp(&cputypval[0], "sun4s"))
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sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */
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if (!strcmp(&cputypval[0], "sun4d"))
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sparc_cpu_model = sun4d;
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if (!strcmp(&cputypval[0], "sun4e"))
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sparc_cpu_model = sun4e;
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if (!strcmp(&cputypval[0], "sun4u"))
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sparc_cpu_model = sun4u;
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if (!strncmp(&cputypval[0], "leon" , 4))
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sparc_cpu_model = sparc_leon;
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leon_patch();
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start_kernel();
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}
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void __init setup_arch(char **cmdline_p)
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{
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int i;
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unsigned long highest_paddr;
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sparc_ttable = &trapbase;
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/* Initialize PROM console and command line. */
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*cmdline_p = prom_getbootargs();
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strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
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parse_early_param();
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boot_flags_init(*cmdline_p);
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register_console(&prom_early_console);
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printk("ARCH: ");
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switch(sparc_cpu_model) {
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case sun4m:
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printk("SUN4M\n");
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break;
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case sun4d:
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printk("SUN4D\n");
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break;
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case sun4e:
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printk("SUN4E\n");
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break;
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case sun4u:
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printk("SUN4U\n");
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break;
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case sparc_leon:
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printk("LEON\n");
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break;
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default:
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printk("UNKNOWN!\n");
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break;
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}
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#ifdef CONFIG_DUMMY_CONSOLE
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conswitchp = &dummy_con;
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#endif
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idprom_init();
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load_mmu();
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phys_base = 0xffffffffUL;
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highest_paddr = 0UL;
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for (i = 0; sp_banks[i].num_bytes != 0; i++) {
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unsigned long top;
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if (sp_banks[i].base_addr < phys_base)
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phys_base = sp_banks[i].base_addr;
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top = sp_banks[i].base_addr +
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sp_banks[i].num_bytes;
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if (highest_paddr < top)
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highest_paddr = top;
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}
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pfn_base = phys_base >> PAGE_SHIFT;
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if (!root_flags)
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root_mountflags &= ~MS_RDONLY;
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ROOT_DEV = old_decode_dev(root_dev);
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#ifdef CONFIG_BLK_DEV_RAM
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rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
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rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
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rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
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#endif
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prom_setsync(prom_sync_me);
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if((boot_flags & BOOTME_DEBUG) && (linux_dbvec != NULL) &&
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((*(short *)linux_dbvec) != -1)) {
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printk("Booted under KADB. Syncing trap table.\n");
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(*(linux_dbvec->teach_debugger))();
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}
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init_task.thread.kregs = &fake_swapper_regs;
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/* Run-time patch instructions to match the cpu model */
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per_cpu_patch();
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paging_init();
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smp_setup_cpu_possible_map();
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}
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extern int stop_a_enabled;
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void sun_do_break(void)
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{
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if (!stop_a_enabled)
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return;
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printk("\n");
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flush_user_windows();
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prom_cmdline();
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}
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EXPORT_SYMBOL(sun_do_break);
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int stop_a_enabled = 1;
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static int __init topology_init(void)
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{
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int i, ncpus, err;
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/* Count the number of physically present processors in
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* the machine, even on uniprocessor, so that /proc/cpuinfo
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* output is consistent with 2.4.x
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*/
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ncpus = 0;
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while (!cpu_find_by_instance(ncpus, NULL, NULL))
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ncpus++;
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ncpus_probed = ncpus;
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err = 0;
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for_each_online_cpu(i) {
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struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
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if (!p)
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err = -ENOMEM;
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else
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register_cpu(p, i);
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}
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return err;
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}
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subsys_initcall(topology_init);
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