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2a63531a61
linux/fs/f2fs
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Yunlei He 2a63531a61 f2fs: fix a hungtask problem caused by congestion_wait 
This patch fix hungtask problem which can be reproduced as follow:

Thread 0~3:
while true
do
        touch /xxx/test/file_xxx
done

Thread 4 write a new checkpoint every three seconds.

In the meantime, fio start 16 threads for randwrite.

With my debug info, cycles num will exceed 1000 in function
f2fs_sync_dirty_inodes, and most of cycle will be dropped
into congestion_wait() and sleep more than 20ms. Cycles num
reduced to 3 with this patch.

Signed-off-by: Yunlei He <heyunlei@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2018-07-27 18:03:59 +09:00
..
acl.c posix_acl: convert posix_acl.a_refcount from atomic_t to refcount_t 2018-01-02 19:27:28 -08:00
acl.h f2fs: remove dead code f2fs_check_acl 2016-09-14 16:52:36 -07:00
checkpoint.c f2fs: fix a hungtask problem caused by congestion_wait 2018-07-27 18:03:59 +09:00
data.c f2fs: allow wrong configured dio to buffered write 2018-07-15 12:14:04 +09:00
debug.c f2fs: avoid stucking GC due to atomic write 2018-05-31 11:31:51 -07:00
dir.c f2fs: clean up symbol namespace 2018-05-31 11:31:53 -07:00
extent_cache.c f2fs: clean up symbol namespace 2018-05-31 11:31:53 -07:00
f2fs.h f2fs: fix to propagate return value of scan_nat_page() 2018-07-27 18:03:59 +09:00
file.c f2fs: Fix uninitialized return in f2fs_ioc_shutdown() 2018-07-27 18:03:59 +09:00
gc.c f2fs: let sync node IO interrupt async one 2018-06-04 14:33:20 -07:00
gc.h f2fs: introduce sbi->gc_mode to determine the policy 2018-05-31 11:31:51 -07:00
hash.c f2fs: check entire encrypted bigname when finding a dentry 2017-05-04 11:44:35 -04:00
inline.c f2fs: clean up symbol namespace 2018-05-31 11:31:53 -07:00
inode.c f2fs: support in-memory inode checksum when checking consistency 2018-07-27 18:03:59 +09:00
Kconfig fs/*/Kconfig: drop links to 404-compliant http://acl.bestbits.at 2018-01-01 12:45:37 -07:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
namei.c vfs/y2038: inode timestamps conversion to timespec64 2018-06-15 07:31:07 +09:00
node.c f2fs: fix to propagate return value of scan_nat_page() 2018-07-27 18:03:59 +09:00
node.h f2fs: support in-memory inode checksum when checking consistency 2018-07-27 18:03:59 +09:00
recovery.c f2fs: clean up symbol namespace 2018-05-31 11:31:53 -07:00
segment.c f2fs: don't issue discard commands in online discard is on 2018-07-27 18:03:59 +09:00
segment.h f2fs: fix to update mtime correctly 2018-06-04 14:31:11 -07:00
shrinker.c f2fs: clean up symbol namespace 2018-05-31 11:31:53 -07:00
super.c f2fs: fix error path of fill_super 2018-07-27 18:03:59 +09:00
sysfs.c f2fs: avoid potential deadlock in f2fs_sbi_store 2018-07-27 18:03:59 +09:00
trace.c f2fs: fix potential hangtask in f2fs_trace_pid 2018-01-02 19:27:30 -08:00
trace.h f2fs: add sbi and page pointer in f2fs_io_info 2015-05-28 15:41:32 -07:00
xattr.c f2fs: clean up symbol namespace 2018-05-31 11:31:53 -07:00
xattr.h f2fs: guard macro variables with braces 2017-04-10 19:48:10 -07:00