lkml.org 
[lkml]   [2013]   [Jan]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH, RFC 08/16] thp, mm: locking tail page is a bug
Date
From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
mm/filemap.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/mm/filemap.c b/mm/filemap.c
index a4b4fd5..f59eaa1 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -665,6 +665,7 @@ void __lock_page(struct page *page)
{
DEFINE_WAIT_BIT(wait, &page->flags, PG_locked);

+ VM_BUG_ON(PageTail(page));
__wait_on_bit_lock(page_waitqueue(page), &wait, sleep_on_page,
TASK_UNINTERRUPTIBLE);
}
@@ -674,6 +675,7 @@ int __lock_page_killable(struct page *page)
{
DEFINE_WAIT_BIT(wait, &page->flags, PG_locked);

+ VM_BUG_ON(PageTail(page));
return __wait_on_bit_lock(page_waitqueue(page), &wait,
sleep_on_page_killable, TASK_KILLABLE);
}
--
1.7.10.4


\
 
 \ /
  Last update: 2013-01-28 11:44    [W:0.239 / U:0.272 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site