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authorJaegeuk Kim <jaegeuk@kernel.org>2017-07-14 11:45:21 -0700
committerJaegeuk Kim <jaegeuk@kernel.org>2017-07-17 19:23:18 -0700
commit4db08d016ccedb5b97869724a096990acad59685 (patch)
treeefa6e133e0a0f181fd36118b8aad1bd0b37dc58c /fs
parent299aa41a45fe21977532fbf992e4f7c5eef73bf0 (diff)
downloadlinux-stericsson-4db08d016ccedb5b97869724a096990acad59685.tar.gz
f2fs: avoid cpu lockup
Before retrying to flush data or dentry pages, we need to release cpu in order to prevent watchdog. Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/f2fs/checkpoint.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 56bbf592e487..5b876f6d3f6b 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -879,6 +879,7 @@ int sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type)
struct inode *inode;
struct f2fs_inode_info *fi;
bool is_dir = (type == DIR_INODE);
+ unsigned long ino = 0;
trace_f2fs_sync_dirty_inodes_enter(sbi->sb, is_dir,
get_pages(sbi, is_dir ?
@@ -901,8 +902,17 @@ retry:
inode = igrab(&fi->vfs_inode);
spin_unlock(&sbi->inode_lock[type]);
if (inode) {
+ unsigned long cur_ino = inode->i_ino;
+
filemap_fdatawrite(inode->i_mapping);
iput(inode);
+ /* We need to give cpu to another writers. */
+ if (ino == cur_ino) {
+ congestion_wait(BLK_RW_ASYNC, HZ/50);
+ cond_resched();
+ } else {
+ ino = cur_ino;
+ }
} else {
/*
* We should submit bio, since it exists several