From: Jaegeuk Kim <jaegeuk@kernel.org>
Date: Wed, 19 Jul 2017 17:59:55 +0000 (-0700)
Subject: f2fs: give a try to do atomic write in -ENOMEM case
X-Git-Tag: v4.14~345^2~58
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=640cc18982b1c2049ac3a7223444248aea7d51b4;p=mirror_ubuntu-bionic-kernel.git

f2fs: give a try to do atomic write in -ENOMEM case

It'd be better to retry writing atomic pages when we get -ENOMEM.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index f964b68718c1..f5d139f897dc 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -309,17 +309,21 @@ static int __commit_inmem_pages(struct inode *inode,
 				inode_dec_dirty_pages(inode);
 				remove_dirty_inode(inode);
 			}
-
+retry:
 			fio.page = page;
 			fio.old_blkaddr = NULL_ADDR;
 			fio.encrypted_page = NULL;
 			fio.need_lock = LOCK_DONE;
 			err = do_write_data_page(&fio);
 			if (err) {
+				if (err == -ENOMEM) {
+					congestion_wait(BLK_RW_ASYNC, HZ/50);
+					cond_resched();
+					goto retry;
+				}
 				unlock_page(page);
 				break;
 			}
-
 			/* record old blkaddr for revoking */
 			cur->old_addr = fio.old_blkaddr;
 			last_idx = page->index;