page-types: add hwpoison/unpoison feature
For hwpoison stress testing. The debugfs mount point is assumed to be /debug/. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
48640d69f5
commit
a54fed9f70
|
@ -170,6 +170,13 @@ static int page_size;
|
|||
static int pagemap_fd;
|
||||
static int kpageflags_fd;
|
||||
|
||||
static int opt_hwpoison;
|
||||
static int opt_unpoison;
|
||||
|
||||
static char *hwpoison_debug_fs = "/debug/hwpoison";
|
||||
static int hwpoison_inject_fd;
|
||||
static int hwpoison_forget_fd;
|
||||
|
||||
#define HASH_SHIFT 13
|
||||
#define HASH_SIZE (1 << HASH_SHIFT)
|
||||
#define HASH_MASK (HASH_SIZE - 1)
|
||||
|
@ -446,6 +453,53 @@ static uint64_t kpageflags_flags(uint64_t flags)
|
|||
return flags;
|
||||
}
|
||||
|
||||
/*
|
||||
* page actions
|
||||
*/
|
||||
|
||||
static void prepare_hwpoison_fd(void)
|
||||
{
|
||||
char buf[100];
|
||||
|
||||
if (opt_hwpoison && !hwpoison_inject_fd) {
|
||||
sprintf(buf, "%s/corrupt-pfn", hwpoison_debug_fs);
|
||||
hwpoison_inject_fd = checked_open(buf, O_WRONLY);
|
||||
}
|
||||
|
||||
if (opt_unpoison && !hwpoison_forget_fd) {
|
||||
sprintf(buf, "%s/renew-pfn", hwpoison_debug_fs);
|
||||
hwpoison_forget_fd = checked_open(buf, O_WRONLY);
|
||||
}
|
||||
}
|
||||
|
||||
static int hwpoison_page(unsigned long offset)
|
||||
{
|
||||
char buf[100];
|
||||
int len;
|
||||
|
||||
len = sprintf(buf, "0x%lx\n", offset);
|
||||
len = write(hwpoison_inject_fd, buf, len);
|
||||
if (len < 0) {
|
||||
perror("hwpoison inject");
|
||||
return len;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int unpoison_page(unsigned long offset)
|
||||
{
|
||||
char buf[100];
|
||||
int len;
|
||||
|
||||
len = sprintf(buf, "0x%lx\n", offset);
|
||||
len = write(hwpoison_forget_fd, buf, len);
|
||||
if (len < 0) {
|
||||
perror("hwpoison forget");
|
||||
return len;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* page frame walker
|
||||
*/
|
||||
|
@ -485,6 +539,11 @@ static void add_page(unsigned long voffset,
|
|||
if (!bit_mask_ok(flags))
|
||||
return;
|
||||
|
||||
if (opt_hwpoison)
|
||||
hwpoison_page(offset);
|
||||
if (opt_unpoison)
|
||||
unpoison_page(offset);
|
||||
|
||||
if (opt_list == 1)
|
||||
show_page_range(voffset, offset, flags);
|
||||
else if (opt_list == 2)
|
||||
|
@ -624,6 +683,8 @@ static void usage(void)
|
|||
" -l|--list Show page details in ranges\n"
|
||||
" -L|--list-each Show page details one by one\n"
|
||||
" -N|--no-summary Don't show summay info\n"
|
||||
" -X|--hwpoison hwpoison pages\n"
|
||||
" -x|--unpoison unpoison pages\n"
|
||||
" -h|--help Show this usage message\n"
|
||||
"addr-spec:\n"
|
||||
" N one page at offset N (unit: pages)\n"
|
||||
|
@ -833,6 +894,8 @@ static struct option opts[] = {
|
|||
{ "list" , 0, NULL, 'l' },
|
||||
{ "list-each" , 0, NULL, 'L' },
|
||||
{ "no-summary", 0, NULL, 'N' },
|
||||
{ "hwpoison" , 0, NULL, 'X' },
|
||||
{ "unpoison" , 0, NULL, 'x' },
|
||||
{ "help" , 0, NULL, 'h' },
|
||||
{ NULL , 0, NULL, 0 }
|
||||
};
|
||||
|
@ -844,7 +907,7 @@ int main(int argc, char *argv[])
|
|||
page_size = getpagesize();
|
||||
|
||||
while ((c = getopt_long(argc, argv,
|
||||
"rp:f:a:b:lLNh", opts, NULL)) != -1) {
|
||||
"rp:f:a:b:lLNXxh", opts, NULL)) != -1) {
|
||||
switch (c) {
|
||||
case 'r':
|
||||
opt_raw = 1;
|
||||
|
@ -870,6 +933,14 @@ int main(int argc, char *argv[])
|
|||
case 'N':
|
||||
opt_no_summary = 1;
|
||||
break;
|
||||
case 'X':
|
||||
opt_hwpoison = 1;
|
||||
prepare_hwpoison_fd();
|
||||
break;
|
||||
case 'x':
|
||||
opt_unpoison = 1;
|
||||
prepare_hwpoison_fd();
|
||||
break;
|
||||
case 'h':
|
||||
usage();
|
||||
exit(0);
|
||||
|
|
Loading…
Reference in a new issue