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| author | Waiman Long <longman@redhat.com> | 2021-11-18 14:14:37 -0500 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2021-11-30 17:22:29 -0800 |
| commit | 1a5620671a1b6fd9cc08761677d050f1702f910c (patch) | |
| tree | 4e57d639dbbb2b30439391cbe312d2fa43e7a139 /kernel/time | |
| parent | c86ff8c55b8ae68837b2fa59dc0c203907e9a15f (diff) | |
| download | linux-1a5620671a1b6fd9cc08761677d050f1702f910c.tar.gz linux-1a5620671a1b6fd9cc08761677d050f1702f910c.tar.bz2 linux-1a5620671a1b6fd9cc08761677d050f1702f910c.zip | |
clocksource: Reduce the default clocksource_watchdog() retries to 2
With the previous patch, there is an extra watchdog read in each retry.
Now the total number of clocksource reads is increased to 4 per iteration.
In order to avoid increasing the clock skew check overhead, the default
maximum number of retries is reduced from 3 to 2 to maintain the same 12
clocksource reads in the worst case.
Suggested-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/clocksource.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c index bcad1a1e5dcf..b7e52a642948 100644 --- a/kernel/time/clocksource.c +++ b/kernel/time/clocksource.c @@ -199,7 +199,7 @@ void clocksource_mark_unstable(struct clocksource *cs) spin_unlock_irqrestore(&watchdog_lock, flags); } -ulong max_cswd_read_retries = 3; +ulong max_cswd_read_retries = 2; module_param(max_cswd_read_retries, ulong, 0644); EXPORT_SYMBOL_GPL(max_cswd_read_retries); static int verify_n_cpus = 8; |