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From: Jiri Slaby <jslaby@suse.cz>
To: Michel Lespinasse <walken@google.com>
Cc: Sasha Levin <levinsasha928@gmail.com>,
	linux-mm@kvack.org, riel@redhat.com, peterz@infradead.org,
	aarcange@redhat.com, hughd@google.com, daniel.santos@pobox.com,
	linux-kernel@vger.kernel.org, akpm@linux-foundation.org,
	Dave Jones <davej@redhat.com>
Subject: Re: [PATCH 6/7] mm: add CONFIG_DEBUG_VM_RB build option
Date: Sat, 15 Sep 2012 09:52:00 +0200	[thread overview]
Message-ID: <505433A0.3010702@suse.cz> (raw)
In-Reply-To: <20120915000029.GA29426@google.com>

On 09/15/2012 02:00 AM, Michel Lespinasse wrote:
> All right. Hugh managed to reproduce the issue on his suse laptop, and
> I came up with a fix.
> 
> The problem was that in mremap, the new vma's vm_{start,end,pgoff}
> fields need to be updated before calling anon_vma_clone() so that the
> new vma will be properly indexed.
> 
> Patch attached. I expect this should also explain Jiri's reported
> failure involving splitting THP pages during mremap(), even though we
> did not manage to reproduce that one.

Oh, great. This is BTW also machine with suse. What was the way that
Hugh used to reproduce the other issue? For me it happened twice in a
row when using zypper to upgrade packages. But it did not happen any
more after that.

thanks,
-- 
js
suse labs

  reply	other threads:[~2012-09-15  7:52 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-09-04  9:20 [PATCH 0/7] use interval trees for anon rmap Michel Lespinasse
2012-09-04  9:20 ` [PATCH 1/7] mm: interval tree updates Michel Lespinasse
2012-09-07 22:13   ` Andrew Morton
2012-09-07 22:29     ` Michel Lespinasse
2012-09-07 22:55       ` Andrew Morton
2012-09-07 23:26         ` Michel Lespinasse
2012-09-08  4:45           ` Hillf Danton
2012-09-07 23:26         ` Michel Lespinasse
2012-09-04  9:20 ` [PATCH 2/7] mm: fix potential anon_vma locking issue in mprotect() Michel Lespinasse
2012-09-04 14:27   ` Andrea Arcangeli
2012-09-04 21:53     ` Michel Lespinasse
2012-09-04 22:16       ` Andrea Arcangeli
2012-09-05  0:45         ` Michel Lespinasse
2012-09-04  9:20 ` [PATCH 3/7] mm anon rmap: remove anon_vma_moveto_tail Michel Lespinasse
2012-09-04  9:20 ` [PATCH 4/7] mm anon rmap: replace same_anon_vma linked list with an interval tree Michel Lespinasse
2012-09-05  0:51   ` Michel Lespinasse
2012-09-04  9:20 ` [PATCH 5/7] mm rmap: remove vma_address check for address inside vma Michel Lespinasse
2012-09-04  9:20 ` [PATCH 6/7] mm: add CONFIG_DEBUG_VM_RB build option Michel Lespinasse
2012-09-14 22:14   ` Sasha Levin
2012-09-14 22:40     ` Sasha Levin
2012-09-14 22:46     ` Michel Lespinasse
2012-09-15  0:00       ` Michel Lespinasse
2012-09-15  7:52         ` Jiri Slaby [this message]
2012-09-16 19:07           ` Hugh Dickins
2012-09-22  7:19             ` Jiri Slaby
2012-09-15  9:26         ` Sasha Levin
2012-09-20 21:39           ` Fengguang Wu
2012-09-20 22:27             ` Hugh Dickins
2012-09-20 22:31               ` Fengguang Wu
2012-09-04  9:20 ` [PATCH 7/7] mm: avoid taking rmap locks in move_ptes() Michel Lespinasse

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