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f2fs: reduce timeout for uncongestion

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On high fs utilization, congestion is hit quite frequently and waiting for a
whooping 20ms is too expensive, especially on critical paths.

Reduce it to an amount that is unlikely to affect UI rendering paths.

The new times are as follows:
  100 Hz  => 1 jiffy   (effective: 10 ms)
  250 Hz  => 2 jiffies (effective: 8 ms)
  300 Hz  => 2 jiffies (effective: 6 ms)
  1000 Hz => 6 jiffies (effective: 6 ms)

Co-authored-by: Danny Lin <danny@kdrag0n.dev>
Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>
Signed-off-by: Adam W. Willis <return.of.octobot@gmail.com>
Signed-off-by: LibXZR <xzr467706992@163.com>
This commit is contained in:
Park Ju Hyung 2020-06-01 19:45:02 +09:00 committed by spakkkk
parent 182804e6fc
commit 9566261ba1
1 changed files with 2 additions and 2 deletions
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4
fs/f2fs/f2fs.h
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@ -580,8 +580,8 @@ enum {
#define DEFAULT_RETRY_IO_COUNT 8 /* maximum retry read IO or flush count */
/* congestion wait timeout value, default: 20ms */
#define DEFAULT_IO_TIMEOUT (msecs_to_jiffies(20))
/* congestion wait timeout value, default: 6ms */
#define DEFAULT_IO_TIMEOUT (msecs_to_jiffies(6))
/* maximum retry quota flush count */
#define DEFAULT_RETRY_QUOTA_FLUSH_COUNT 8