From: Peter Zijlstra <peterz@infradead.org>
To: Max Filippov <jcmvbkbc@gmail.com>
Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
linux-arch@vger.kernel.org, linux-mm@kvack.org,
Ralf Baechle <ralf@linux-mips.org>,
Chris Zankel <chris@zankel.net>,
Marc Gauthier <Marc.Gauthier@tensilica.com>,
linux-xtensa@linux-xtensa.org, Hugh Dickins <hughd@google.com>
Subject: Re: TLB and PTE coherency during munmap
Date: Fri, 31 May 2013 09:55:08 +0200 [thread overview]
Message-ID: <20130531075508.GE27176@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <CAMo8BfJtkEtf9RKsGRnOnZ5zbJQz5tW4HeDfydFq_ZnrFr8opw@mail.gmail.com>
On Fri, May 31, 2013 at 08:09:17AM +0400, Max Filippov wrote:
> Hi Peter,
>
> On Wed, May 29, 2013 at 9:51 PM, Peter Zijlstra <peterz@infradead.org> wrote:
> > What about something like this?
>
> With that patch I still get mtest05 firing my TLB/PTE incoherency check
> in the UP PREEMPT_VOLUNTARY configuration. This happens after
> zap_pte_range completion in the end of unmap_region because of
> rescheduling called in the following call chain:
>
> unmap_region
> free_pgtables
> unlink_anon_vmas
> lock_anon_vma_root
> down_write
> might_sleep
> might_resched
> _cond_resched
>
Hurm, yeah. Catching all regular blocking primitives and making it
maintainable is going to be a problem :/
I suppose the easiest thing is simply killing fast_mode for now/
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next prev parent reply other threads:[~2013-05-31 7:55 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAMo8BfL4QfJrfejNKmBDhAVdmE=_Ys6MVUH5Xa3w_mU41hwx0A@mail.gmail.com>
2013-05-26 2:50 ` Max Filippov
2013-05-28 7:10 ` Max Filippov
2013-05-29 12:27 ` Peter Zijlstra
2013-05-29 12:42 ` Vineet Gupta
2013-05-29 12:47 ` Peter Zijlstra
2013-05-29 17:51 ` Peter Zijlstra
2013-05-29 22:04 ` Catalin Marinas
2013-05-30 6:48 ` Peter Zijlstra
2013-05-30 5:04 ` Vineet Gupta
2013-05-30 6:56 ` Peter Zijlstra
2013-05-30 7:00 ` Vineet Gupta
2013-05-30 11:03 ` Peter Zijlstra
2013-05-31 4:09 ` Max Filippov
2013-05-31 7:55 ` Peter Zijlstra [this message]
2013-06-03 9:05 ` Peter Zijlstra
2013-06-03 9:16 ` Ingo Molnar
2013-06-03 10:01 ` Catalin Marinas
2013-06-03 10:04 ` Peter Zijlstra
2013-06-03 10:09 ` Catalin Marinas
2013-06-04 9:52 ` Peter Zijlstra
2013-06-05 0:05 ` Linus Torvalds
2013-06-05 10:26 ` [PATCH] arch, mm: Remove tlb_fast_mode() Peter Zijlstra
2013-05-31 1:40 ` TLB and PTE coherency during munmap Max Filippov
2013-05-28 14:34 ` Konrad Rzeszutek Wilk
2013-05-29 3:23 ` Max Filippov
2013-05-28 15:16 ` Michal Hocko
2013-05-28 15:23 ` Catalin Marinas
[not found] ` <CAHkRjk4ZNwZvf_Cv+HqfMManodCkEpCPdZokPQ68z3nVG8-+wg@mail.gmail.com>
2013-05-29 4:15 ` Max Filippov
2013-05-29 10:15 ` Catalin Marinas
2013-05-31 1:26 ` Max Filippov
2013-05-31 9:06 ` Catalin Marinas
2013-06-03 9:16 ` Max Filippov
2013-05-29 12:00 ` Vineet Gupta
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