summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorDave Kleikamp <dave.kleikamp@oracle.com>2011-12-21 11:05:48 -0600
committerGreg Kroah-Hartman <gregkh@suse.de>2012-01-06 14:13:54 -0800
commit2f79eddd49d391aded0b0c20f7eef3bec6d5e096 (patch)
treeedb3ff8cf2b0f5fecac30d01ac691e0ec0672dfa
parent20e725bc08091c303a469d8e1e295bf3b360c778 (diff)
vfs: __read_cache_page should use gfp argument rather than GFP_KERNEL
commit e6f67b8c05f5e129e126f4409ddac6f25f58ffcb upstream. lockdep reports a deadlock in jfs because a special inode's rw semaphore is taken recursively. The mapping's gfp mask is GFP_NOFS, but is not used when __read_cache_page() calls add_to_page_cache_lru(). Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com> Acked-by: Hugh Dickins <hughd@google.com> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--mm/filemap.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index a8251a8d3457..dd828ea59dc7 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1807,7 +1807,7 @@ repeat:
page = __page_cache_alloc(gfp | __GFP_COLD);
if (!page)
return ERR_PTR(-ENOMEM);
- err = add_to_page_cache_lru(page, mapping, index, GFP_KERNEL);
+ err = add_to_page_cache_lru(page, mapping, index, gfp);
if (unlikely(err)) {
page_cache_release(page);
if (err == -EEXIST)
@@ -1904,10 +1904,7 @@ static struct page *wait_on_page_read(struct page *page)
* @gfp: the page allocator flags to use if allocating
*
* This is the same as "read_mapping_page(mapping, index, NULL)", but with
- * any new page allocations done using the specified allocation flags. Note
- * that the Radix tree operations will still use GFP_KERNEL, so you can't
- * expect to do this atomically or anything like that - but you can pass in
- * other page requirements.
+ * any new page allocations done using the specified allocation flags.
*
* If the page does not get brought uptodate, return -EIO.
*/