From: Michal Hocko <mhocko@kernel.org>
To: Minchan Kim <minchan@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
will.deacon@arm.com, Bob Liu <liubo95@huawei.com>,
Andrew Morton <akpm@linux-foundation.org>,
David Rientjes <rientjes@google.com>,
Ingo Molnar <mingo@kernel.org>, Roman Gushchin <guro@fb.com>,
Konstantin Khlebnikov <khlebnikov@yandex-team.ru>,
Andrea Arcangeli <aarcange@redhat.com>
Subject: Re: [PATCH] arch, mm: introduce arch_tlb_gather_mmu_lazy (was: Re: [RESEND PATCH] mm, oom_reaper: gather each vma to prevent) leaking TLB entry
Date: Wed, 15 Nov 2017 09:14:52 +0100 [thread overview]
Message-ID: <20171115081452.bt7cpfombm4bzha4@dhcp22.suse.cz> (raw)
In-Reply-To: <20171113002833.GA18301@bbox>
On Mon 13-11-17 09:28:33, Minchan Kim wrote:
[...]
> void arch_tlb_gather_mmu(...)
>
> tlb->fullmm = !(start | (end + 1)) && atomic_read(&mm->mm_users) == 0;
Sorry, I should have realized sooner but this will not work for the oom
reaper. It _can_ race with the final exit_mmap and run with mm_users == 0
--
Michal Hocko
SUSE Labs
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next prev parent reply other threads:[~2017-11-15 8:14 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-07 9:54 [RESEND PATCH] mm, oom_reaper: gather each vma to prevent leaking TLB entry Wang Nan
2017-11-07 10:09 ` Michal Hocko
2017-11-10 0:19 ` Minchan Kim
2017-11-10 10:15 ` Michal Hocko
2017-11-10 12:26 ` [PATCH] arch, mm: introduce arch_tlb_gather_mmu_lazy (was: Re: [RESEND PATCH] mm, oom_reaper: gather each vma to prevent) " Michal Hocko
2017-11-13 0:28 ` Minchan Kim
2017-11-13 9:51 ` Michal Hocko
2017-11-14 1:45 ` Minchan Kim
2017-11-14 7:21 ` Michal Hocko
2017-11-15 0:12 ` Minchan Kim
2017-11-15 8:14 ` Michal Hocko [this message]
2017-11-16 0:44 ` Minchan Kim
2017-11-16 9:19 ` Michal Hocko
2017-11-15 17:33 ` Will Deacon
2017-11-16 9:20 ` Michal Hocko
2017-11-20 14:24 ` Will Deacon
2017-11-20 16:04 ` [PATCH] arch, mm: introduce arch_tlb_gather_mmu_lazy Michal Hocko
2017-11-22 19:30 ` Will Deacon
2017-11-23 6:18 ` Minchan Kim
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