VMware balloon: Enable notification via VMCI
Get notified immediately when a balloon target is set, instead of waiting for up to one second. The up-to 1 second gap could be long enough to cause swapping inside of the VM that receives the VM. Acked-by: Andy King <acking@vmware.com> Signed-off-by: Xavier Deguillard <xdeguillard@vmware.com> Tested-by: Siva Sankar Reddy B <sankars@vmware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>hifive-unleashed-5.1
Philip P. Moltmann
Greg Kroah-Hartman
parent
d7568c130d
commit
48e3d668b7
|
|
@ -414,7 +414,7 @@ config TI_DAC7512
|
|||
|
||||
config VMWARE_BALLOON
|
||||
tristate "VMware Balloon Driver"
|
||||
depends on X86 && HYPERVISOR_GUEST
|
||||
depends on VMWARE_VMCI && X86 && HYPERVISOR_GUEST
|
||||
help
|
||||
This is VMware physical memory management driver which acts
|
||||
like a "balloon" that can be inflated to reclaim physical pages
|
||||
|
|
|
|||
|
|
@ -1,7 +1,7 @@
|
|||
/*
|
||||
* VMware Balloon driver.
|
||||
*
|
||||
* Copyright (C) 2000-2013, VMware, Inc. All Rights Reserved.
|
||||
* Copyright (C) 2000-2014, VMware, Inc. All Rights Reserved.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU General Public License as published by the
|
||||
|
|
@ -43,11 +43,13 @@
|
|||
#include <linux/workqueue.h>
|
||||
#include <linux/debugfs.h>
|
||||
#include <linux/seq_file.h>
|
||||
#include <linux/vmw_vmci_defs.h>
|
||||
#include <linux/vmw_vmci_api.h>
|
||||
#include <asm/hypervisor.h>
|
||||
|
||||
MODULE_AUTHOR("VMware, Inc.");
|
||||
MODULE_DESCRIPTION("VMware Memory Control (Balloon) Driver");
|
||||
MODULE_VERSION("1.4.1.0-k");
|
||||
MODULE_VERSION("1.5.0.0-k");
|
||||
MODULE_ALIAS("dmi:*:svnVMware*:*");
|
||||
MODULE_ALIAS("vmware_vmmemctl");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
@ -101,14 +103,16 @@ enum vmwballoon_capabilities {
|
|||
/*
|
||||
* Bit 0 is reserved and not associated to any capability.
|
||||
*/
|
||||
VMW_BALLOON_BASIC_CMDS = (1 << 1),
|
||||
VMW_BALLOON_BATCHED_CMDS = (1 << 2),
|
||||
VMW_BALLOON_BATCHED_2M_CMDS = (1 << 3),
|
||||
VMW_BALLOON_BASIC_CMDS = (1 << 1),
|
||||
VMW_BALLOON_BATCHED_CMDS = (1 << 2),
|
||||
VMW_BALLOON_BATCHED_2M_CMDS = (1 << 3),
|
||||
VMW_BALLOON_SIGNALLED_WAKEUP_CMD = (1 << 4),
|
||||
};
|
||||
|
||||
#define VMW_BALLOON_CAPABILITIES (VMW_BALLOON_BASIC_CMDS \
|
||||
| VMW_BALLOON_BATCHED_CMDS \
|
||||
| VMW_BALLOON_BATCHED_2M_CMDS)
|
||||
| VMW_BALLOON_BATCHED_2M_CMDS \
|
||||
| VMW_BALLOON_SIGNALLED_WAKEUP_CMD)
|
||||
|
||||
#define VMW_BALLOON_2M_SHIFT (9)
|
||||
#define VMW_BALLOON_NUM_PAGE_SIZES (2)
|
||||
|
|
@ -123,7 +127,9 @@ enum vmwballoon_capabilities {
|
|||
* VMW_BALLOON_BATCHED_CMDS:
|
||||
* BATCHED_LOCK and BATCHED_UNLOCK commands.
|
||||
* VMW BALLOON_BATCHED_2M_CMDS:
|
||||
* BATCHED_2M_LOCK and BATCHED_2M_UNLOCK commands.
|
||||
* BATCHED_2M_LOCK and BATCHED_2M_UNLOCK commands,
|
||||
* VMW VMW_BALLOON_SIGNALLED_WAKEUP_CMD:
|
||||
* VMW_BALLOON_CMD_VMCI_DOORBELL_SET command.
|
||||
*/
|
||||
#define VMW_BALLOON_CMD_START 0
|
||||
#define VMW_BALLOON_CMD_GET_TARGET 1
|
||||
|
|
@ -134,6 +140,7 @@ enum vmwballoon_capabilities {
|
|||
#define VMW_BALLOON_CMD_BATCHED_UNLOCK 7
|
||||
#define VMW_BALLOON_CMD_BATCHED_2M_LOCK 8
|
||||
#define VMW_BALLOON_CMD_BATCHED_2M_UNLOCK 9
|
||||
#define VMW_BALLOON_CMD_VMCI_DOORBELL_SET 10
|
||||
|
||||
|
||||
/* error codes */
|
||||
|
|
@ -214,6 +221,7 @@ static void vmballoon_batch_set_pa(struct vmballoon_batch_page *batch, int idx,
|
|||
#ifdef CONFIG_DEBUG_FS
|
||||
struct vmballoon_stats {
|
||||
unsigned int timer;
|
||||
unsigned int doorbell;
|
||||
|
||||
/* allocation statistics */
|
||||
unsigned int alloc[VMW_BALLOON_NUM_PAGE_SIZES];
|
||||
|
|
@ -235,6 +243,8 @@ struct vmballoon_stats {
|
|||
unsigned int start_fail;
|
||||
unsigned int guest_type;
|
||||
unsigned int guest_type_fail;
|
||||
unsigned int doorbell_set;
|
||||
unsigned int doorbell_unset;
|
||||
};
|
||||
|
||||
#define STATS_INC(stat) (stat)++
|
||||
|
|
@ -299,6 +309,8 @@ struct vmballoon {
|
|||
struct sysinfo sysinfo;
|
||||
|
||||
struct delayed_work dwork;
|
||||
|
||||
struct vmci_handle vmci_doorbell;
|
||||
};
|
||||
|
||||
static struct vmballoon balloon;
|
||||
|
|
@ -992,6 +1004,65 @@ static bool vmballoon_init_batching(struct vmballoon *b)
|
|||
return true;
|
||||
}
|
||||
|
||||
/*
|
||||
* Receive notification and resize balloon
|
||||
*/
|
||||
static void vmballoon_doorbell(void *client_data)
|
||||
{
|
||||
struct vmballoon *b = client_data;
|
||||
|
||||
STATS_INC(b->stats.doorbell);
|
||||
|
||||
mod_delayed_work(system_freezable_wq, &b->dwork, 0);
|
||||
}
|
||||
|
||||
/*
|
||||
* Clean up vmci doorbell
|
||||
*/
|
||||
static void vmballoon_vmci_cleanup(struct vmballoon *b)
|
||||
{
|
||||
int error;
|
||||
|
||||
VMWARE_BALLOON_CMD(VMCI_DOORBELL_SET, VMCI_INVALID_ID,
|
||||
VMCI_INVALID_ID, error);
|
||||
STATS_INC(b->stats.doorbell_unset);
|
||||
|
||||
if (!vmci_handle_is_invalid(b->vmci_doorbell)) {
|
||||
vmci_doorbell_destroy(b->vmci_doorbell);
|
||||
b->vmci_doorbell = VMCI_INVALID_HANDLE;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Initialize vmci doorbell, to get notified as soon as balloon changes
|
||||
*/
|
||||
static int vmballoon_vmci_init(struct vmballoon *b)
|
||||
{
|
||||
int error = 0;
|
||||
|
||||
if ((b->capabilities & VMW_BALLOON_SIGNALLED_WAKEUP_CMD) != 0) {
|
||||
error = vmci_doorbell_create(&b->vmci_doorbell,
|
||||
VMCI_FLAG_DELAYED_CB,
|
||||
VMCI_PRIVILEGE_FLAG_RESTRICTED,
|
||||
vmballoon_doorbell, b);
|
||||
|
||||
if (error == VMCI_SUCCESS) {
|
||||
VMWARE_BALLOON_CMD(VMCI_DOORBELL_SET,
|
||||
b->vmci_doorbell.context,
|
||||
b->vmci_doorbell.resource, error);
|
||||
STATS_INC(b->stats.doorbell_set);
|
||||
}
|
||||
}
|
||||
|
||||
if (error != 0) {
|
||||
vmballoon_vmci_cleanup(b);
|
||||
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Perform standard reset sequence by popping the balloon (in case it
|
||||
* is not empty) and then restarting protocol. This operation normally
|
||||
|
|
@ -999,6 +1070,10 @@ static bool vmballoon_init_batching(struct vmballoon *b)
|
|||
*/
|
||||
static void vmballoon_reset(struct vmballoon *b)
|
||||
{
|
||||
int error;
|
||||
|
||||
vmballoon_vmci_cleanup(b);
|
||||
|
||||
/* free all pages, skipping monitor unlock */
|
||||
vmballoon_pop(b);
|
||||
|
||||
|
|
@ -1024,6 +1099,11 @@ static void vmballoon_reset(struct vmballoon *b)
|
|||
}
|
||||
|
||||
b->reset_required = false;
|
||||
|
||||
error = vmballoon_vmci_init(b);
|
||||
if (error)
|
||||
pr_err("failed to initialize vmci doorbell\n");
|
||||
|
||||
if (!vmballoon_send_guest_id(b))
|
||||
pr_err("failed to send guest ID to the host\n");
|
||||
}
|
||||
|
|
@ -1097,6 +1177,7 @@ static int vmballoon_debug_show(struct seq_file *f, void *offset)
|
|||
seq_printf(f,
|
||||
"\n"
|
||||
"timer: %8u\n"
|
||||
"doorbell: %8u\n"
|
||||
"start: %8u (%4u failed)\n"
|
||||
"guestType: %8u (%4u failed)\n"
|
||||
"2m-lock: %8u (%4u failed)\n"
|
||||
|
|
@ -1112,8 +1193,11 @@ static int vmballoon_debug_show(struct seq_file *f, void *offset)
|
|||
"err2mAlloc: %8u\n"
|
||||
"errAlloc: %8u\n"
|
||||
"err2mFree: %8u\n"
|
||||
"errFree: %8u\n",
|
||||
"errFree: %8u\n"
|
||||
"doorbellSet: %8u\n"
|
||||
"doorbellUnset: %8u\n",
|
||||
stats->timer,
|
||||
stats->doorbell,
|
||||
stats->start, stats->start_fail,
|
||||
stats->guest_type, stats->guest_type_fail,
|
||||
stats->lock[true], stats->lock_fail[true],
|
||||
|
|
@ -1127,7 +1211,8 @@ static int vmballoon_debug_show(struct seq_file *f, void *offset)
|
|||
stats->free[true],
|
||||
stats->free[false],
|
||||
stats->refused_alloc[true], stats->refused_alloc[false],
|
||||
stats->refused_free[true], stats->refused_free[false]);
|
||||
stats->refused_free[true], stats->refused_free[false],
|
||||
stats->doorbell_set, stats->doorbell_unset);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -1204,6 +1289,7 @@ static int __init vmballoon_init(void)
|
|||
if (error)
|
||||
return error;
|
||||
|
||||
balloon.vmci_doorbell = VMCI_INVALID_HANDLE;
|
||||
balloon.batch_page = NULL;
|
||||
balloon.page = NULL;
|
||||
balloon.reset_required = true;
|
||||
|
|
@ -1216,6 +1302,7 @@ module_init(vmballoon_init);
|
|||
|
||||
static void __exit vmballoon_exit(void)
|
||||
{
|
||||
vmballoon_vmci_cleanup(&balloon);
|
||||
cancel_delayed_work_sync(&balloon.dwork);
|
||||
|
||||
vmballoon_debugfs_exit(&balloon);
|
||||
|
|
|
|||
Loading…
Reference in New Issue