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f2fs: set GFP_NOFS for grab_cache_page

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For normal inodes, their pages are allocated with __GFP_FS, which can cause
filesystem calls when reclaiming memory.
This can incur a dead lock condition accordingly.

So, this patch addresses this problem by introducing
f2fs_grab_cache_page(.., bool for_write), which calls
grab_cache_page_write_begin() with AOP_FLAG_NOFS.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim
2015-10-09 15:11:38 -07:00
parent 6e2c64ad7c
commit a56c7c6fb3
5 changed files with 28 additions and 18 deletions
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6
fs/f2fs/gc.c
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@@ -550,7 +550,7 @@ static void move_encrypted_block(struct inode *inode, block_t bidx)
int err;
/* do not read out */
page = grab_cache_page(inode->i_mapping, bidx);
page = f2fs_grab_cache_page(inode->i_mapping, bidx, false);
if (!page)
return;
@@ -620,7 +620,7 @@ static void move_data_page(struct inode *inode, block_t bidx, int gc_type)
{
struct page *page;
page = get_lock_data_page(inode, bidx);
page = get_lock_data_page(inode, bidx, true);
if (IS_ERR(page))
return;
@@ -714,7 +714,7 @@ next_step:
start_bidx = start_bidx_of_node(nofs, F2FS_I(inode));
data_page = get_read_data_page(inode,
start_bidx + ofs_in_node, READA);
start_bidx + ofs_in_node, READA, true);
if (IS_ERR(data_page)) {
iput(inode);
continue;