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authorJaegeuk Kim <jaegeuk@kernel.org>2017-08-06 22:09:00 -0700
committerJaegeuk Kim <jaegeuk@kernel.org>2017-08-15 10:40:12 -0700
commitd9872a698c393e0d1abca86bf05b62712cbfc581 (patch)
treee7c272fc1fed41d2a4590f381c0fa5bb983c02f9 /Documentation/filesystems/f2fs.txt
parent3537581a722402a1e6f0942cd0653035a9e09e21 (diff)
downloadlinux-d9872a698c393e0d1abca86bf05b62712cbfc581.tar.bz2
f2fs: introduce gc_urgent mode for background GC
This patch adds a sysfs entry to control urgent mode for background GC. If this is set, background GC thread conducts GC with gc_urgent_sleep_time all the time. Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'Documentation/filesystems/f2fs.txt')
-rw-r--r--Documentation/filesystems/f2fs.txt9
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt
index b8f495a8b67d..84f36896766c 100644
--- a/Documentation/filesystems/f2fs.txt
+++ b/Documentation/filesystems/f2fs.txt
@@ -210,6 +210,15 @@ Files in /sys/fs/f2fs/<devname>
gc_idle = 1 will select the Cost Benefit approach
& setting gc_idle = 2 will select the greedy approach.
+ gc_urgent This parameter controls triggering background GCs
+ urgently or not. Setting gc_urgent = 0 [default]
+ makes back to default behavior, while if it is set
+ to 1, background thread starts to do GC by given
+ gc_urgent_sleep_time interval.
+
+ gc_urgent_sleep_time This parameter controls sleep time for gc_urgent.
+ 500 ms is set by default. See above gc_urgent.
+
reclaim_segments This parameter controls the number of prefree
segments to be reclaimed. If the number of prefree
segments is larger than the number of segments