| commit | b1d4f7f4bdcf9915c41ff8cfc4425c84dabb1fde | |
| author | Clemens Ladisch <clemens@ladisch.de> | |
| Thu, 10 Feb 2011 15:15:44 +0000 (10 16:15 +0100) | ||
| committer | Takashi Iwai <tiwai@suse.de> | |
| Thu, 10 Feb 2011 17:53:29 +0000 (10 18:53 +0100) | ||
| tree | 092e1575eb7c098670ebebd568566067e11a8c32 | treesnapshot (tar.gz zip) |
| parent | a6c47a85b8e7e4a8c47394607c5e5c43224b0892 | commitdiff |
ALSA: hrtimer: handle delayed timer interrupts
If a timer interrupt was delayed too much, hrtimer_forward_now() will
forward the timer expiry more than once. When this happens, the
additional number of elapsed ALSA timer ticks must be passed to
snd_timer_interrupt() to prevent the ALSA timer from falling behind.
This mostly fixes MIDI slowdown problems on highly-loaded systems with
badly behaved interrupt handlers.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Reported-and-tested-by: Arthur Marsh <arthur.marsh@internode.on.net>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
If a timer interrupt was delayed too much, hrtimer_forward_now() will
forward the timer expiry more than once. When this happens, the
additional number of elapsed ALSA timer ticks must be passed to
snd_timer_interrupt() to prevent the ALSA timer from falling behind.
This mostly fixes MIDI slowdown problems on highly-loaded systems with
badly behaved interrupt handlers.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Reported-and-tested-by: Arthur Marsh <arthur.marsh@internode.on.net>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| sound/core/hrtimer.c | diffblobblamehistory |