f2fs: set GFP_NOFS for grab_cache_page
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>
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 8d5583b..5d2a2ee 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -505,14 +505,14 @@
return 0;
if (cache_only) {
- page = grab_cache_page(mapping, index);
+ page = f2fs_grab_cache_page(mapping, index, false);
if (page && PageUptodate(page))
goto truncate_out;
f2fs_put_page(page, 1);
return 0;
}
- page = get_lock_data_page(inode, index);
+ page = get_lock_data_page(inode, index, true);
if (IS_ERR(page))
return 0;
truncate_out:
@@ -879,7 +879,7 @@
} else {
struct page *psrc, *pdst;
- psrc = get_lock_data_page(inode, src);
+ psrc = get_lock_data_page(inode, src, true);
if (IS_ERR(psrc))
return PTR_ERR(psrc);
pdst = get_new_data_page(inode, NULL, dst, false);