diff options
Diffstat (limited to 'ntp-Make-periodic-RTC-update-more-reliable.patch')
| -rw-r--r-- | ntp-Make-periodic-RTC-update-more-reliable.patch | 44 |
1 files changed, 0 insertions, 44 deletions
diff --git a/ntp-Make-periodic-RTC-update-more-reliable.patch b/ntp-Make-periodic-RTC-update-more-reliable.patch deleted file mode 100644 index 59179e719..000000000 --- a/ntp-Make-periodic-RTC-update-more-reliable.patch +++ /dev/null @@ -1,44 +0,0 @@ -From a97ad0c4b447a132a322cedc3a5f7fa4cab4b304 Mon Sep 17 00:00:00 2001 -From: Miroslav Lichvar <mlichvar@redhat.com> -Date: Thu, 1 Aug 2013 19:31:35 +0200 -Subject: [PATCH] ntp: Make periodic RTC update more reliable - -The current code requires that the scheduled update of the RTC happens -in the closest tick to the half of the second. This seems to be -difficult to achieve reliably. The scheduled work may be missing the -target time by a tick or two and be constantly rescheduled every second. - -Relax the limit to 10 ticks. As a typical RTC drifts in the 11-minute -update interval by several milliseconds, this shouldn't affect the -overall accuracy of the RTC much. - -Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com> -Signed-off-by: John Stultz <john.stultz@linaro.org> ---- - kernel/time/ntp.c | 3 ++- - 1 file changed, 2 insertions(+), 1 deletion(-) - -diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c -index 8f5b3b9..ab1fa7c 100644 ---- a/kernel/time/ntp.c -+++ b/kernel/time/ntp.c -@@ -475,6 +475,7 @@ static void sync_cmos_clock(struct work_struct *work) - * called as close as possible to 500 ms before the new second starts. - * This code is run on a timer. If the clock is set, that timer - * may not expire at the correct time. Thus, we adjust... -+ * We want the clock to be within a couple of ticks from the target. - */ - if (!ntp_synced()) { - /* -@@ -485,7 +486,7 @@ static void sync_cmos_clock(struct work_struct *work) - } - - getnstimeofday(&now); -- if (abs(now.tv_nsec - (NSEC_PER_SEC / 2)) <= tick_nsec / 2) { -+ if (abs(now.tv_nsec - (NSEC_PER_SEC / 2)) <= tick_nsec * 5) { - struct timespec adjust = now; - - fail = -ENODEV; --- -1.7.9.5 - |