Messages in this thread |  | | Date | Fri, 01 Nov 2013 10:27:36 -0400 | From | Rik van Riel <> | Subject | Re: [PATCH -tip] fix race between stop_two_cpus and stop_cpus |
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On 11/01/2013 10:24 AM, Peter Zijlstra wrote: > On Fri, Nov 01, 2013 at 01:44:24PM +0000, Mel Gorman wrote: >> Ok, I see your point now but still wonder if this is too specialised >> for what we are trying to do. Could it have been done with a read-write >> semaphore with the global stop_cpus taking it for write and stop_two_cpus >> taking it for read? > > rwsem for read is still global state.. That said it should be fairly > easy to use lglock for this.
I'll rewrite the patch using lglocks, that should make things more readable.
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