mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 08:58:07 +00:00
112bc2e120
Fix this: kernel BUG at mm/memcontrol.c:2155! invalid opcode: 0000 [#1] last sysfs file: Pid: 18, comm: sh Not tainted 2.6.37-rc3 #3 /Bochs EIP: 0060:[<c10731b2>] EFLAGS: 00000246 CPU: 0 EIP is at mem_cgroup_move_account+0xe2/0xf0 EAX: 00000004 EBX: c6f931d4 ECX: c681c300 EDX: c681c000 ESI: c681c300 EDI: ffffffea EBP: c681c000 ESP: c46f3e30 DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068 Process sh (pid: 18, ti=c46f2000 task=c6826e60 task.ti=c46f2000) Stack: 00000155 c681c000 0805f000 c46ee180 c46f3e5c c7058820 c1074d37 00000000 08060000 c46db9a0 c46ec080 c7058820 0805f000 08060000 c46f3e98 c1074c50 c106c75e c46f3e98 c46ec080 08060000 0805ffff c46db9a0 c46f3e98 c46e0340 Call Trace: [<c1074d37>] ? mem_cgroup_move_charge_pte_range+0xe7/0x130 [<c1074c50>] ? mem_cgroup_move_charge_pte_range+0x0/0x130 [<c106c75e>] ? walk_page_range+0xee/0x1d0 [<c10725d6>] ? mem_cgroup_move_task+0x66/0x90 [<c1074c50>] ? mem_cgroup_move_charge_pte_range+0x0/0x130 [<c1072570>] ? mem_cgroup_move_task+0x0/0x90 [<c1042616>] ? cgroup_attach_task+0x136/0x200 [<c1042878>] ? cgroup_tasks_write+0x48/0xc0 [<c1041e9e>] ? cgroup_file_write+0xde/0x220 [<c101398d>] ? do_page_fault+0x17d/0x3f0 [<c108a79d>] ? alloc_fd+0x2d/0xd0 [<c1041dc0>] ? cgroup_file_write+0x0/0x220 [<c1077ba2>] ? vfs_write+0x92/0xc0 [<c1077c81>] ? sys_write+0x41/0x70 [<c1140e3d>] ? syscall_call+0x7/0xb Code: 03 00 74 09 8b 44 24 04 e8 1c f1 ff ff 89 73 04 8d 86 b0 00 00 00 b9 01 00 00 00 89 da 31 ff e8 65 f5 ff ff e9 4d ff ff ff 0f 0b <0f> 0b 0f 0b 0f 0b 90 8d b4 26 00 00 00 00 83 ec 10 8b 0d f4 e3 EIP: [<c10731b2>] mem_cgroup_move_account+0xe2/0xf0 SS:ESP 0068:c46f3e30 ---[ end trace 7daa1582159b6532 ]--- lock_page_cgroup and unlock_page_cgroup are implemented using bit_spinlock. bit_spinlock doesn't touch the bit if we are on non-SMP machine, so we can't use the bit to check whether the lock was taken. Let's introduce is_page_cgroup_locked based on bit_spin_is_locked instead of PageCgroupLocked to fix it. [akpm@linux-foundation.org: s/is_page_cgroup_locked/page_is_cgroup_locked/] Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name> Reviewed-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujtisu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
167 lines
4 KiB
C
167 lines
4 KiB
C
#ifndef __LINUX_PAGE_CGROUP_H
|
|
#define __LINUX_PAGE_CGROUP_H
|
|
|
|
#ifdef CONFIG_CGROUP_MEM_RES_CTLR
|
|
#include <linux/bit_spinlock.h>
|
|
/*
|
|
* Page Cgroup can be considered as an extended mem_map.
|
|
* A page_cgroup page is associated with every page descriptor. The
|
|
* page_cgroup helps us identify information about the cgroup
|
|
* All page cgroups are allocated at boot or memory hotplug event,
|
|
* then the page cgroup for pfn always exists.
|
|
*/
|
|
struct page_cgroup {
|
|
unsigned long flags;
|
|
struct mem_cgroup *mem_cgroup;
|
|
struct page *page;
|
|
struct list_head lru; /* per cgroup LRU list */
|
|
};
|
|
|
|
void __meminit pgdat_page_cgroup_init(struct pglist_data *pgdat);
|
|
|
|
#ifdef CONFIG_SPARSEMEM
|
|
static inline void __init page_cgroup_init_flatmem(void)
|
|
{
|
|
}
|
|
extern void __init page_cgroup_init(void);
|
|
#else
|
|
void __init page_cgroup_init_flatmem(void);
|
|
static inline void __init page_cgroup_init(void)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
struct page_cgroup *lookup_page_cgroup(struct page *page);
|
|
|
|
enum {
|
|
/* flags for mem_cgroup */
|
|
PCG_LOCK, /* page cgroup is locked */
|
|
PCG_CACHE, /* charged as cache */
|
|
PCG_USED, /* this object is in use. */
|
|
PCG_ACCT_LRU, /* page has been accounted for */
|
|
PCG_FILE_MAPPED, /* page is accounted as "mapped" */
|
|
PCG_MIGRATION, /* under page migration */
|
|
};
|
|
|
|
#define TESTPCGFLAG(uname, lname) \
|
|
static inline int PageCgroup##uname(struct page_cgroup *pc) \
|
|
{ return test_bit(PCG_##lname, &pc->flags); }
|
|
|
|
#define SETPCGFLAG(uname, lname) \
|
|
static inline void SetPageCgroup##uname(struct page_cgroup *pc)\
|
|
{ set_bit(PCG_##lname, &pc->flags); }
|
|
|
|
#define CLEARPCGFLAG(uname, lname) \
|
|
static inline void ClearPageCgroup##uname(struct page_cgroup *pc) \
|
|
{ clear_bit(PCG_##lname, &pc->flags); }
|
|
|
|
#define TESTCLEARPCGFLAG(uname, lname) \
|
|
static inline int TestClearPageCgroup##uname(struct page_cgroup *pc) \
|
|
{ return test_and_clear_bit(PCG_##lname, &pc->flags); }
|
|
|
|
/* Cache flag is set only once (at allocation) */
|
|
TESTPCGFLAG(Cache, CACHE)
|
|
CLEARPCGFLAG(Cache, CACHE)
|
|
SETPCGFLAG(Cache, CACHE)
|
|
|
|
TESTPCGFLAG(Used, USED)
|
|
CLEARPCGFLAG(Used, USED)
|
|
SETPCGFLAG(Used, USED)
|
|
|
|
SETPCGFLAG(AcctLRU, ACCT_LRU)
|
|
CLEARPCGFLAG(AcctLRU, ACCT_LRU)
|
|
TESTPCGFLAG(AcctLRU, ACCT_LRU)
|
|
TESTCLEARPCGFLAG(AcctLRU, ACCT_LRU)
|
|
|
|
|
|
SETPCGFLAG(FileMapped, FILE_MAPPED)
|
|
CLEARPCGFLAG(FileMapped, FILE_MAPPED)
|
|
TESTPCGFLAG(FileMapped, FILE_MAPPED)
|
|
|
|
SETPCGFLAG(Migration, MIGRATION)
|
|
CLEARPCGFLAG(Migration, MIGRATION)
|
|
TESTPCGFLAG(Migration, MIGRATION)
|
|
|
|
static inline int page_cgroup_nid(struct page_cgroup *pc)
|
|
{
|
|
return page_to_nid(pc->page);
|
|
}
|
|
|
|
static inline enum zone_type page_cgroup_zid(struct page_cgroup *pc)
|
|
{
|
|
return page_zonenum(pc->page);
|
|
}
|
|
|
|
static inline void lock_page_cgroup(struct page_cgroup *pc)
|
|
{
|
|
bit_spin_lock(PCG_LOCK, &pc->flags);
|
|
}
|
|
|
|
static inline void unlock_page_cgroup(struct page_cgroup *pc)
|
|
{
|
|
bit_spin_unlock(PCG_LOCK, &pc->flags);
|
|
}
|
|
|
|
static inline int page_is_cgroup_locked(struct page_cgroup *pc)
|
|
{
|
|
return bit_spin_is_locked(PCG_LOCK, &pc->flags);
|
|
}
|
|
|
|
#else /* CONFIG_CGROUP_MEM_RES_CTLR */
|
|
struct page_cgroup;
|
|
|
|
static inline void __meminit pgdat_page_cgroup_init(struct pglist_data *pgdat)
|
|
{
|
|
}
|
|
|
|
static inline struct page_cgroup *lookup_page_cgroup(struct page *page)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void page_cgroup_init(void)
|
|
{
|
|
}
|
|
|
|
static inline void __init page_cgroup_init_flatmem(void)
|
|
{
|
|
}
|
|
|
|
#endif
|
|
|
|
#include <linux/swap.h>
|
|
|
|
#ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
|
|
extern unsigned short swap_cgroup_cmpxchg(swp_entry_t ent,
|
|
unsigned short old, unsigned short new);
|
|
extern unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id);
|
|
extern unsigned short lookup_swap_cgroup(swp_entry_t ent);
|
|
extern int swap_cgroup_swapon(int type, unsigned long max_pages);
|
|
extern void swap_cgroup_swapoff(int type);
|
|
#else
|
|
|
|
static inline
|
|
unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline
|
|
unsigned short lookup_swap_cgroup(swp_entry_t ent)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int
|
|
swap_cgroup_swapon(int type, unsigned long max_pages)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void swap_cgroup_swapoff(int type)
|
|
{
|
|
return;
|
|
}
|
|
|
|
#endif
|
|
#endif
|