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authorZachary Amsden <zach@vmware.com>2007-03-05 00:30:34 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-03-05 07:57:52 -0800
commit7507ba34e827ca3c6bbcd34d20a8df8ba365fca6 (patch)
treeafa186f38ab55667074a06ade7ad6a1d1ec84d9e /sound
parent0dc952dc3e6d96d554a19fa7bee3f3b1d55e3cff (diff)
[PATCH] vmi: timer fixes round two
Critical bugfixes for the VMI-Timer code. 1) Do not setup a one shot alarm if we are keeping the periodic alarm armed. Additionally, since the periodic alarm can be run at a lower rate than HZ, let's fixup the guard to the no-idle-hz mode appropriately. This fixes the bug where the no-idle-hz mode might have a higher interrupt rate than the non-idle case. 2) The interrupt handler can no longer adjust xtime due to nested lock acquisition. Drop this. We don't need to check for wallclock time at every tick, it can be done in userspace instead. 3) Add a bypass to disable noidle operation. This is useful as a last minute workaround, or testing measure. 4) The code to skip the IO_APIC timer testing (no_timer_check) should be conditional on IO_APIC, not SMP, since UP kernels can have this configured in as well. Signed-off-by: Dan Hecht <dhecht@vmware.com> Signed-off-by: Zachary Amsden <zach@vmware.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'sound')
0 files changed, 0 insertions, 0 deletions