Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1619877

Re: [PATCH] mm, numa: Fix bad pmd by atomically check for pmd_trans_huge when marking page tables prot_numa

From Rik van Riel <riel@redhat.com>
Newsgroups linux.kernel
Subject Re: [PATCH] mm, numa: Fix bad pmd by atomically check for pmd_trans_huge when marking page tables prot_numa
Date 2017-04-10 14:40 +0200
Message-ID <tuGLU-FF-11@gated-at.bofh.it> (permalink)
References <tuE7n-7nn-3@gated-at.bofh.it>
Organization Red Hat, Inc

Show all headers | View raw

On Mon, 2017-04-10 at 10:48 +0100, Mel Gorman wrote:
> 
> While this could be fixed with heavy locking, it's only necessary to
> make a copy of the PMD on the stack during change_pmd_range and avoid
> races. A new helper is created for this as the check if quite subtle
> and the
> existing similar helpful is not suitable. This passed 154 hours of
> testing
> (usually triggers between 20 minutes and 24 hours) without detecting
> bad
> PMDs or corruption. A basic test of an autonuma-intensive workload
> showed
> no significant change in behaviour.
> 
> Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
> Cc: stable@vger.kernel.org

Acked-by: Rik van Riel <riel@redhat.com>

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH] mm, numa: Fix bad pmd by atomically check for pmd_trans_huge  when marking page tables prot_numa Mel Gorman <mgorman@techsingularity.net> - 2017-04-10 11:50 +0200
  Re: [PATCH] mm, numa: Fix bad pmd by atomically check for  pmd_trans_huge when marking page tables prot_numa Vlastimil Babka <vbabka@suse.cz> - 2017-04-10 12:10 +0200
    Re: [PATCH] mm, numa: Fix bad pmd by atomically check for  pmd_trans_huge when marking page tables prot_numa Mel Gorman <mgorman@techsingularity.net> - 2017-04-10 14:20 +0200
  Re: [PATCH] mm, numa: Fix bad pmd by atomically check for  pmd_trans_huge when marking page tables prot_numa Rik van Riel <riel@redhat.com> - 2017-04-10 14:40 +0200
  Re: [PATCH] mm, numa: Fix bad pmd by atomically check for  pmd_trans_huge when marking page tables prot_numa Michal Hocko <mhocko@kernel.org> - 2017-04-10 16:00 +0200
    Re: [PATCH] mm, numa: Fix bad pmd by atomically check for  pmd_trans_huge when marking page tables prot_numa Mel Gorman <mgorman@techsingularity.net> - 2017-04-10 19:40 +0200
  Re: [PATCH] mm, numa: Fix bad pmd by atomically check for  pmd_trans_huge when marking page tables prot_numa Mel Gorman <mgorman@techsingularity.net> - 2017-04-10 19:30 +0200
    Re: [PATCH] mm, numa: Fix bad pmd by atomically check for  pmd_trans_huge when marking page tables prot_numa Mel Gorman <mgorman@techsingularity.net> - 2017-04-10 20:10 +0200
      Re: [PATCH] mm, numa: Fix bad pmd by atomically check for  pmd_trans_huge when marking page tables prot_numa Andrew Morton <akpm@linux-foundation.org> - 2017-04-11 00:10 +0200
        Re: [PATCH] mm, numa: Fix bad pmd by atomically check for  pmd_trans_huge when marking page tables prot_numa Vlastimil Babka <vbabka@suse.cz> - 2017-04-11 08:40 +0200
          Re: [PATCH] mm, numa: Fix bad pmd by atomically check for  pmd_trans_huge when marking page tables prot_numa Andrew Morton <akpm@linux-foundation.org> - 2017-04-11 23:50 +0200
        Re: [PATCH] mm, numa: Fix bad pmd by atomically check for  pmd_trans_huge when marking page tables prot_numa Mel Gorman <mgorman@techsingularity.net> - 2017-04-11 10:30 +0200

csiph-web