Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=e1a1cd590e3fcb0d2e230128daf2337ea55387dc
Commit: e1a1cd590e3fcb0d2e230128daf2337ea55387dc
Parent: bed7161a519a2faef53e1bce1b47595e297c1d14
Author: Balbir Singh <[EMAIL PROTECTED]>
AuthorDate: Thu Feb 7 00:14:02 2008 -0800
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Thu Feb 7 08:42:19 2008 -0800
Memory controller: make charging gfp mask aware
Nick Piggin pointed out that swap cache and page cache addition routines
could be called from non GFP_KERNEL contexts. This patch makes the
charging routine aware of the gfp context. Charging might fail if the
cgroup is over it's limit, in which case a suitable error is returned.
This patch was tested on a Powerpc box. I am still looking at being able
to test the path, through which allocations happen in non GFP_KERNEL
contexts.
[EMAIL PROTECTED]: problem with ZONE_MOVABLE]
Signed-off-by: Balbir Singh <[EMAIL PROTECTED]>
Cc: Pavel Emelianov <[EMAIL PROTECTED]>
Cc: Paul Menage <[EMAIL PROTECTED]>
Cc: Peter Zijlstra <[EMAIL PROTECTED]>
Cc: "Eric W. Biederman" <[EMAIL PROTECTED]>
Cc: Nick Piggin <[EMAIL PROTECTED]>
Cc: Kirill Korotaev <[EMAIL PROTECTED]>
Cc: Herbert Poetzl <[EMAIL PROTECTED]>
Cc: David Rientjes <[EMAIL PROTECTED]>
Cc: Vaidyanathan Srinivasan <[EMAIL PROTECTED]>
Signed-off-by: KAMEZAWA Hiroyuki <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
include/linux/memcontrol.h | 12 ++++++++----
include/linux/swap.h | 3 ++-
mm/filemap.c | 2 +-
mm/memcontrol.c | 24 +++++++++++++++++-------
mm/memory.c | 10 +++++-----
mm/migrate.c | 2 +-
mm/swap_state.c | 2 +-
mm/swapfile.c | 2 +-
mm/vmscan.c | 14 +++++---------
9 files changed, 41 insertions(+), 30 deletions(-)
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 9d0a830..cc0ad71 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -32,7 +32,8 @@ extern void mm_free_cgroup(struct mm_struct *mm);
extern void page_assign_page_cgroup(struct page *page,
struct page_cgroup *pc);
extern struct page_cgroup *page_get_page_cgroup(struct page *page);
-extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm);
+extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
+ gfp_t gfp_mask);
extern void mem_cgroup_uncharge(struct page_cgroup *pc);
extern void mem_cgroup_move_lists(struct page_cgroup *pc, bool active);
extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
@@ -42,7 +43,8 @@ extern unsigned long mem_cgroup_isolate_pages(unsigned long
nr_to_scan,
struct mem_cgroup *mem_cont,
int active);
extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
-extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm);
+extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
+ gfp_t gfp_mask);
extern struct mem_cgroup *mm_cgroup(struct mm_struct *mm);
static inline void mem_cgroup_uncharge_page(struct page *page)
@@ -70,7 +72,8 @@ static inline struct page_cgroup *page_get_page_cgroup(struct
page *page)
return NULL;
}
-static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm)
+static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
+ gfp_t gfp_mask)
{
return 0;
}
@@ -89,7 +92,8 @@ static inline void mem_cgroup_move_lists(struct page_cgroup
*pc,
}
static inline int mem_cgroup_cache_charge(struct page *page,
- struct mm_struct *mm)
+ struct mm_struct *mm,
+ gfp_t gfp_mask)
{
return 0;
}
diff --git a/include/linux/swap.h b/include/linux/swap.h
index 4d91bc0..3ca5c4b 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -183,7 +183,8 @@ extern void swap_setup(void);
/* linux/mm/vmscan.c */
extern unsigned long try_to_free_pages(struct zone **zones, int order,
gfp_t gfp_mask);
-extern unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem);
+extern unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem,
+ gfp_t gfp_mask);
extern int __isolate_lru_page(struct page *page, int mode);
extern unsigned long shrink_all_memory(unsigned long nr_pages);
extern int vm_swappiness;
diff --git a/mm/filemap.c b/mm/filemap.c
index 8ae171c..63040d5 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -464,7 +464,7 @@ int add_to_page_cache(struct page *page, struct
address_space *mapping,
if (error == 0) {
- error = mem_cgroup_cache_charge(page, current->mm);
+ error = mem_cgroup_cache_charge(page, current->mm, gfp_mask);
if (error)
goto out;
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index ff7cac6..ac87744 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -261,7 +261,8 @@ unsigned long mem_cgroup_isolate_pages(unsigned long
nr_to_scan,
* 0 if the charge was successful
* < 0 if the cgroup is over its limit
*/
-int mem_cgroup_charge(struct page *page, struct mm_struct *mm)
+int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
+ gfp_t gfp_mask)
{
struct mem_cgroup *mem;
struct page_cgroup *pc, *race_pc;
@@ -293,7 +294,7 @@ retry:
unlock_page_cgroup(page);
- pc = kzalloc(sizeof(struct page_cgroup), GFP_KERNEL);
+ pc = kzalloc(sizeof(struct page_cgroup), gfp_mask);
if (pc == NULL)
goto err;
@@ -320,7 +321,14 @@ retry:
* the cgroup limit.
*/
while (res_counter_charge(&mem->res, PAGE_SIZE)) {
- if (try_to_free_mem_cgroup_pages(mem))
+ bool is_atomic = gfp_mask & GFP_ATOMIC;
+ /*
+ * We cannot reclaim under GFP_ATOMIC, fail the charge
+ */
+ if (is_atomic)
+ goto noreclaim;
+
+ if (try_to_free_mem_cgroup_pages(mem, gfp_mask))
continue;
/*
@@ -344,9 +352,10 @@ retry:
congestion_wait(WRITE, HZ/10);
continue;
}
-
+noreclaim:
css_put(&mem->css);
- mem_cgroup_out_of_memory(mem, GFP_KERNEL);
+ if (!is_atomic)
+ mem_cgroup_out_of_memory(mem, GFP_KERNEL);
goto free_pc;
}
@@ -385,7 +394,8 @@ err:
/*
* See if the cached pages should be charged at all?
*/
-int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm)
+int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
+ gfp_t gfp_mask)
{
struct mem_cgroup *mem;
if (!mm)
@@ -393,7 +403,7 @@ int mem_cgroup_cache_charge(struct page *page, struct
mm_struct *mm)
mem = rcu_dereference(mm->mem_cgroup);
if (mem->control_type == MEM_CGROUP_TYPE_ALL)
- return mem_cgroup_charge(page, mm);
+ return mem_cgroup_charge(page, mm, gfp_mask);
else
return 0;
}
diff --git a/mm/memory.c b/mm/memory.c
index 0ba224e..153a54b 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1147,7 +1147,7 @@ static int insert_page(struct mm_struct *mm, unsigned
long addr, struct page *pa
pte_t *pte;
spinlock_t *ptl;
- retval = mem_cgroup_charge(page, mm);
+ retval = mem_cgroup_charge(page, mm, GFP_KERNEL);
if (retval)
goto out;
@@ -1650,7 +1650,7 @@ gotten:
cow_user_page(new_page, old_page, address, vma);
__SetPageUptodate(new_page);
- if (mem_cgroup_charge(new_page, mm))
+ if (mem_cgroup_charge(new_page, mm, GFP_KERNEL))
goto oom_free_new;
/*
@@ -2052,7 +2052,7 @@ static int do_swap_page(struct mm_struct *mm, struct
vm_area_struct *vma,
count_vm_event(PGMAJFAULT);
}
- if (mem_cgroup_charge(page, mm)) {
+ if (mem_cgroup_charge(page, mm, GFP_KERNEL)) {
delayacct_clear_flag(DELAYACCT_PF_SWAPIN);
ret = VM_FAULT_OOM;
goto out;
@@ -2139,7 +2139,7 @@ static int do_anonymous_page(struct mm_struct *mm, struct
vm_area_struct *vma,
goto oom;
__SetPageUptodate(page);
- if (mem_cgroup_charge(page, mm))
+ if (mem_cgroup_charge(page, mm, GFP_KERNEL))
goto oom_free_page;
entry = mk_pte(page, vma->vm_page_prot);
@@ -2277,7 +2277,7 @@ static int __do_fault(struct mm_struct *mm, struct
vm_area_struct *vma,
}
- if (mem_cgroup_charge(page, mm)) {
+ if (mem_cgroup_charge(page, mm, GFP_KERNEL)) {
ret = VM_FAULT_OOM;
goto out;
}
diff --git a/mm/migrate.c b/mm/migrate.c
index 417bbda..7637941 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -153,7 +153,7 @@ static void remove_migration_pte(struct vm_area_struct *vma,
return;
}
- if (mem_cgroup_charge(new, mm)) {
+ if (mem_cgroup_charge(new, mm, GFP_KERNEL)) {
pte_unmap(ptep);
return;
}
diff --git a/mm/swap_state.c b/mm/swap_state.c
index 8825886..581b609 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -78,7 +78,7 @@ int add_to_swap_cache(struct page *page, swp_entry_t entry,
gfp_t gfp_mask)
error = radix_tree_preload(gfp_mask);
if (!error) {
- error = mem_cgroup_cache_charge(page, current->mm);
+ error = mem_cgroup_cache_charge(page, current->mm, gfp_mask);
if (error)
goto out;
diff --git a/mm/swapfile.c b/mm/swapfile.c
index fddc4cc..35e00c3 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -510,7 +510,7 @@ unsigned int count_swap_pages(int type, int free)
static int unuse_pte(struct vm_area_struct *vma, pte_t *pte,
unsigned long addr, swp_entry_t entry, struct page *page)
{
- if (mem_cgroup_charge(page, vma->vm_mm))
+ if (mem_cgroup_charge(page, vma->vm_mm, GFP_KERNEL))
return -ENOMEM;
inc_mm_counter(vma->vm_mm, anon_rss);
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 215f6a7..b7d868c 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1337,16 +1337,11 @@ unsigned long try_to_free_pages(struct zone **zones,
int order, gfp_t gfp_mask)
#ifdef CONFIG_CGROUP_MEM_CONT
-#ifdef CONFIG_HIGHMEM
-#define ZONE_USERPAGES ZONE_HIGHMEM
-#else
-#define ZONE_USERPAGES ZONE_NORMAL
-#endif
-
-unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem_cont)
+unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem_cont,
+ gfp_t gfp_mask)
{
struct scan_control sc = {
- .gfp_mask = GFP_KERNEL,
+ .gfp_mask = gfp_mask,
.may_writepage = !laptop_mode,
.may_swap = 1,
.swap_cluster_max = SWAP_CLUSTER_MAX,
@@ -1357,9 +1352,10 @@ unsigned long try_to_free_mem_cgroup_pages(struct
mem_cgroup *mem_cont)
};
int node;
struct zone **zones;
+ int target_zone = gfp_zone(GFP_HIGHUSER_MOVABLE);
for_each_online_node(node) {
- zones = NODE_DATA(node)->node_zonelists[ZONE_USERPAGES].zones;
+ zones = NODE_DATA(node)->node_zonelists[target_zone].zones;
if (do_try_to_free_pages(zones, sc.gfp_mask, &sc))
return 1;
}
-
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