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Add vm.swap_objects sysctl

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Reviewed by:	markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D31163
This commit is contained in:
Konstantin Belousov 2021-07-13 13:27:36 +03:00
parent 1b610624fd
commit 42812ccc96
1 changed files with 24 additions and 4 deletions
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28
sys/vm/vm_object.c
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@ -2471,7 +2471,7 @@ vm_object_busy_wait(vm_object_t obj, const char *wmesg)
}
static int
vm_object_list_handler(struct sysctl_req *req)
vm_object_list_handler(struct sysctl_req *req, bool swap_only)
{
struct kinfo_vmobject *kvo;
char *fullpath, *freepath;
@ -2509,10 +2509,12 @@ vm_object_list_handler(struct sysctl_req *req)
*/
mtx_lock(&vm_object_list_mtx);
TAILQ_FOREACH(obj, &vm_object_list, object_list) {
if (obj->type == OBJT_DEAD)
if (obj->type == OBJT_DEAD ||
(swap_only && (obj->flags & (OBJ_ANON | OBJ_SWAP)) == 0))
continue;
VM_OBJECT_RLOCK(obj);
if (obj->type == OBJT_DEAD) {
if (obj->type == OBJT_DEAD ||
(swap_only && (obj->flags & (OBJ_ANON | OBJ_SWAP)) == 0)) {
VM_OBJECT_RUNLOCK(obj);
continue;
}
@ -2592,13 +2594,31 @@ vm_object_list_handler(struct sysctl_req *req)
static int
sysctl_vm_object_list(SYSCTL_HANDLER_ARGS)
{
return (vm_object_list_handler(req));
return (vm_object_list_handler(req, false));
}
SYSCTL_PROC(_vm, OID_AUTO, objects, CTLTYPE_STRUCT | CTLFLAG_RW | CTLFLAG_SKIP |
CTLFLAG_MPSAFE, NULL, 0, sysctl_vm_object_list, "S,kinfo_vmobject",
"List of VM objects");
static int
sysctl_vm_object_list_swap(SYSCTL_HANDLER_ARGS)
{
return (vm_object_list_handler(req, true));
}
/*
* This sysctl returns list of the anonymous or swap objects. Intent
* is to provide stripped optimized list useful to analyze swap use.
* Since technically non-swap (default) objects participate in the
* shadow chains, and are converted to swap type as needed by swap
* pager, we must report them.
*/
SYSCTL_PROC(_vm, OID_AUTO, swap_objects,
CTLTYPE_STRUCT | CTLFLAG_RW | CTLFLAG_SKIP | CTLFLAG_MPSAFE, NULL, 0,
sysctl_vm_object_list_swap, "S,kinfo_vmobject",
"List of swap VM objects");
#include "opt_ddb.h"
#ifdef DDB
#include <sys/kernel.h>