svn commit: r211176 - in head/sys: amd64/amd64 i386/i386
attilio at freebsd.org
Wed Aug 11 17:25:48 UTC 2010
2010/8/11 John Baldwin <jhb at freebsd.org>:
> Attilio Rao wrote:
>> Author: attilio
>> Date: Wed Aug 11 10:51:27 2010
>> New Revision: 211176
>> URL: http://svn.freebsd.org/changeset/base/211176
>> IPI handlers may run generally with interrupts disabled because they
>> are served via an interrupt gate.
>> However, that doesn't explicitly prevent preemption and thread
>> migration thus scheduler pinning may be necessary in some handlers.
>> Fix that.
>> Tested by: gianni
>> MFC after: 1 month
> Actually that does prevent preemption if you do not call any code that would
> schedule a thread. I think this change is all safe to revert.
Do you recall, then, why lapic_handle_timer() does critical section?
It seems to be catered by interrupt gate as well, and I don't see any
point re-enabling them explicitly.
Peace can only be achieved by understanding - A. Einstein
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