[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <1523975611-15978-15-git-send-email-ldufour@linux.vnet.ibm.com>
Date: Tue, 17 Apr 2018 16:33:20 +0200
From: Laurent Dufour <ldufour@...ux.vnet.ibm.com>
To: akpm@...ux-foundation.org, mhocko@...nel.org, peterz@...radead.org,
kirill@...temov.name, ak@...ux.intel.com, dave@...olabs.net,
jack@...e.cz, Matthew Wilcox <willy@...radead.org>,
benh@...nel.crashing.org, mpe@...erman.id.au, paulus@...ba.org,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, hpa@...or.com,
Will Deacon <will.deacon@....com>,
Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
Andrea Arcangeli <aarcange@...hat.com>,
Alexei Starovoitov <alexei.starovoitov@...il.com>,
kemi.wang@...el.com, sergey.senozhatsky.work@...il.com,
Daniel Jordan <daniel.m.jordan@...cle.com>,
David Rientjes <rientjes@...gle.com>,
Jerome Glisse <jglisse@...hat.com>,
Ganesh Mahendran <opensource.ganesh@...il.com>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
haren@...ux.vnet.ibm.com, khandual@...ux.vnet.ibm.com,
npiggin@...il.com, bsingharora@...il.com,
paulmck@...ux.vnet.ibm.com, Tim Chen <tim.c.chen@...ux.intel.com>,
linuxppc-dev@...ts.ozlabs.org, x86@...nel.org
Subject: [PATCH v10 14/25] mm: introduce __lru_cache_add_active_or_unevictable
The speculative page fault handler which is run without holding the
mmap_sem is calling lru_cache_add_active_or_unevictable() but the vm_flags
is not guaranteed to remain constant.
Introducing __lru_cache_add_active_or_unevictable() which has the vma flags
value parameter instead of the vma pointer.
Acked-by: David Rientjes <rientjes@...gle.com>
Signed-off-by: Laurent Dufour <ldufour@...ux.vnet.ibm.com>
---
include/linux/swap.h | 10 ++++++++--
mm/memory.c | 8 ++++----
mm/swap.c | 6 +++---
3 files changed, 15 insertions(+), 9 deletions(-)
diff --git a/include/linux/swap.h b/include/linux/swap.h
index 1985940af479..a7dc37e0e405 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -338,8 +338,14 @@ extern void deactivate_file_page(struct page *page);
extern void mark_page_lazyfree(struct page *page);
extern void swap_setup(void);
-extern void lru_cache_add_active_or_unevictable(struct page *page,
- struct vm_area_struct *vma);
+extern void __lru_cache_add_active_or_unevictable(struct page *page,
+ unsigned long vma_flags);
+
+static inline void lru_cache_add_active_or_unevictable(struct page *page,
+ struct vm_area_struct *vma)
+{
+ return __lru_cache_add_active_or_unevictable(page, vma->vm_flags);
+}
/* linux/mm/vmscan.c */
extern unsigned long zone_reclaimable_pages(struct zone *zone);
diff --git a/mm/memory.c b/mm/memory.c
index e28cbbae3f3d..47af9e97f02a 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2559,7 +2559,7 @@ static int wp_page_copy(struct vm_fault *vmf)
ptep_clear_flush_notify(vma, vmf->address, vmf->pte);
page_add_new_anon_rmap(new_page, vma, vmf->address, false);
mem_cgroup_commit_charge(new_page, memcg, false, false);
- lru_cache_add_active_or_unevictable(new_page, vma);
+ __lru_cache_add_active_or_unevictable(new_page, vmf->vma_flags);
/*
* We call the notify macro here because, when using secondary
* mmu page tables (such as kvm shadow page tables), we want the
@@ -3095,7 +3095,7 @@ int do_swap_page(struct vm_fault *vmf)
if (unlikely(page != swapcache && swapcache)) {
page_add_new_anon_rmap(page, vma, vmf->address, false);
mem_cgroup_commit_charge(page, memcg, false, false);
- lru_cache_add_active_or_unevictable(page, vma);
+ __lru_cache_add_active_or_unevictable(page, vmf->vma_flags);
} else {
do_page_add_anon_rmap(page, vma, vmf->address, exclusive);
mem_cgroup_commit_charge(page, memcg, true, false);
@@ -3246,7 +3246,7 @@ static int do_anonymous_page(struct vm_fault *vmf)
inc_mm_counter_fast(vma->vm_mm, MM_ANONPAGES);
page_add_new_anon_rmap(page, vma, vmf->address, false);
mem_cgroup_commit_charge(page, memcg, false, false);
- lru_cache_add_active_or_unevictable(page, vma);
+ __lru_cache_add_active_or_unevictable(page, vmf->vma_flags);
setpte:
set_pte_at(vma->vm_mm, vmf->address, vmf->pte, entry);
@@ -3500,7 +3500,7 @@ int alloc_set_pte(struct vm_fault *vmf, struct mem_cgroup *memcg,
inc_mm_counter_fast(vma->vm_mm, MM_ANONPAGES);
page_add_new_anon_rmap(page, vma, vmf->address, false);
mem_cgroup_commit_charge(page, memcg, false, false);
- lru_cache_add_active_or_unevictable(page, vma);
+ __lru_cache_add_active_or_unevictable(page, vmf->vma_flags);
} else {
inc_mm_counter_fast(vma->vm_mm, mm_counter_file(page));
page_add_file_rmap(page, false);
diff --git a/mm/swap.c b/mm/swap.c
index 3dd518832096..f2f9c587246f 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -455,12 +455,12 @@ void lru_cache_add(struct page *page)
* directly back onto it's zone's unevictable list, it does NOT use a
* per cpu pagevec.
*/
-void lru_cache_add_active_or_unevictable(struct page *page,
- struct vm_area_struct *vma)
+void __lru_cache_add_active_or_unevictable(struct page *page,
+ unsigned long vma_flags)
{
VM_BUG_ON_PAGE(PageLRU(page), page);
- if (likely((vma->vm_flags & (VM_LOCKED | VM_SPECIAL)) != VM_LOCKED))
+ if (likely((vma_flags & (VM_LOCKED | VM_SPECIAL)) != VM_LOCKED))
SetPageActive(page);
else if (!TestSetPageMlocked(page)) {
/*
--
2.7.4
Powered by blists - more mailing lists