malhuda/msm-4.14
1
0
Fork 0
mirror of https://github.com/rd-stuffs/msm-4.14.git synced 2025-02-20 11:45:48 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity

f2fs: fix unnecessary periodic wakeup of discard thread when dev is busy

Browse Source 
When dev is busy, discard thread wake up timeout can be aligned with the
exact time that it needs to wait for dev to come out of busy. This helps
to avoid unnecessary periodic wakeups and thus save some power.

Change-Id: Ic0d113e377062146899cf14cac9c8e7a145f8484
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
This commit is contained in:
Sahitya Tummala 2018-08-29 10:43:43 +05:30
parent 39fe1cda39
commit 8145e4913c
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
fs/f2fs/segment.c
View File

@ -1384,6 +1384,8 @@ static int issue_discard_thread(void *data)
struct discard_policy dpolicy;
unsigned int wait_ms = DEF_MIN_DISCARD_ISSUE_TIME;
int issued;
unsigned long interval = sbi->interval_time[REQ_TIME] * HZ;
long delta;
set_freezable();
@ -1415,7 +1417,11 @@ static int issue_discard_thread(void *data)
__wait_all_discard_cmd(sbi, &dpolicy);
wait_ms = dpolicy.min_interval;
} else if (issued == -1){
wait_ms = dpolicy.mid_interval;
delta = (sbi->last_time[REQ_TIME] + interval) - jiffies;
if (delta > 0)
wait_ms = jiffies_to_msecs(delta);
else
wait_ms = dpolicy.mid_interval;
} else {
wait_ms = dpolicy.max_interval;
}