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From: Rafael Aquini <aquini@redhat.com>
To: Sasha Levin <levinsasha928@gmail.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	virtualization@lists.linux-foundation.org,
	Andrew Morton <akpm@linux-foundation.org>,
	Mel Gorman <mel@csn.ul.ie>, "Michael S. Tsirkin" <mst@redhat.com>,
	Minchan Kim <minchan@kernel.org>, Rik van Riel <riel@redhat.com>,
	Rusty Russell <rusty@rustcorp.com.au>
Subject: Re: [PATCH v12 4/7] mm: introduce compaction and migration for ballooned pages
Date: Sat, 17 Nov 2012 19:54:35 -0200	[thread overview]
Message-ID: <20121117215434.GA23879@x61.redhat.com> (raw)
In-Reply-To: <50A7D0FA.2080709@gmail.com>

On Sat, Nov 17, 2012 at 01:01:30PM -0500, Sasha Levin wrote:
> 
> I'm getting the following while fuzzing using trinity inside a KVM tools guest,
> on latest -next:
> 
> [ 1642.783728] BUG: unable to handle kernel NULL pointer dereference at 0000000000000194
> [ 1642.785083] IP: [<ffffffff8122b354>] isolate_migratepages_range+0x344/0x7b0
> 
> My guess is that we see those because of a race during the check in
> isolate_migratepages_range().
> 
> 
> Thanks,
> Sasha

Sasha, could you share your .config and steps you did used with trinity? So I
can attempt to reproduce this issue you reported.

Thanks, 
Rafael

WARNING: multiple messages have this Message-ID (diff)
From: Rafael Aquini <aquini@redhat.com>
To: Sasha Levin <levinsasha928@gmail.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	virtualization@lists.linux-foundation.org,
	Andrew Morton <akpm@linux-foundation.org>,
	Mel Gorman <mel@csn.ul.ie>, "Michael S. Tsirkin" <mst@redhat.com>,
	Minchan Kim <minchan@kernel.org>, Rik van Riel <riel@redhat.com>,
	Rusty Russell <rusty@rustcorp.com.au>
Subject: Re: [PATCH v12 4/7] mm: introduce compaction and migration for ballooned pages
Date: Sat, 17 Nov 2012 19:54:35 -0200	[thread overview]
Message-ID: <20121117215434.GA23879@x61.redhat.com> (raw)
In-Reply-To: <50A7D0FA.2080709@gmail.com>

On Sat, Nov 17, 2012 at 01:01:30PM -0500, Sasha Levin wrote:
> 
> I'm getting the following while fuzzing using trinity inside a KVM tools guest,
> on latest -next:
> 
> [ 1642.783728] BUG: unable to handle kernel NULL pointer dereference at 0000000000000194
> [ 1642.785083] IP: [<ffffffff8122b354>] isolate_migratepages_range+0x344/0x7b0
> 
> My guess is that we see those because of a race during the check in
> isolate_migratepages_range().
> 
> 
> Thanks,
> Sasha

Sasha, could you share your .config and steps you did used with trinity? So I
can attempt to reproduce this issue you reported.

Thanks, 
Rafael

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  reply	other threads:[~2012-11-17 21:55 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-11-11 19:01 [PATCH v12 0/7] make balloon pages movable by compaction Rafael Aquini
2012-11-11 19:01 ` Rafael Aquini
2012-11-11 19:01 ` [PATCH v12 1/7] mm: adjust address_space_operations.migratepage() return code Rafael Aquini
2012-11-11 19:01   ` Rafael Aquini
2012-11-11 19:01 ` Rafael Aquini
2012-11-11 19:01 ` [PATCH v12 2/7] mm: redefine address_space.assoc_mapping Rafael Aquini
2012-11-11 19:01   ` Rafael Aquini
2012-11-11 19:01 ` Rafael Aquini
2012-11-11 19:01 ` [PATCH v12 3/7] mm: introduce a common interface for balloon pages mobility Rafael Aquini
2012-11-11 19:01 ` Rafael Aquini
2012-11-11 19:01   ` Rafael Aquini
2012-11-11 19:01 ` [PATCH v12 4/7] mm: introduce compaction and migration for ballooned pages Rafael Aquini
2012-11-11 19:01   ` Rafael Aquini
2012-11-17 18:01   ` Sasha Levin
2012-11-17 18:01     ` Sasha Levin
2012-11-17 18:01     ` Sasha Levin
2012-11-17 21:54     ` Rafael Aquini [this message]
2012-11-17 21:54       ` Rafael Aquini
2012-11-18 14:59       ` Sasha Levin
2012-11-18 14:59         ` Sasha Levin
2012-11-20 14:14         ` Rafael Aquini
2012-11-20 14:14         ` Rafael Aquini
2012-11-20 14:14           ` Rafael Aquini
2012-11-21  1:18           ` Sasha Levin
2012-11-21  1:18             ` Sasha Levin
2012-11-21  1:18             ` Sasha Levin
2012-11-22  0:01             ` Rafael Aquini
2012-11-22  0:01             ` Rafael Aquini
2012-11-22  0:01               ` Rafael Aquini
2012-11-22 14:19               ` Sasha Levin
2012-11-22 14:19               ` Sasha Levin
2012-11-22 14:19                 ` Sasha Levin
2012-11-22 15:10                 ` Rafael Aquini
2012-11-22 15:10                   ` Rafael Aquini
2012-11-22 15:10                   ` Rafael Aquini
2012-11-26 15:57                   ` Sasha Levin
2012-11-26 15:57                     ` Sasha Levin
2012-11-26 15:57                     ` Sasha Levin
2012-11-17 21:54     ` Rafael Aquini
2012-11-11 19:01 ` Rafael Aquini
2012-11-11 19:01 ` [PATCH v12 5/7] virtio_balloon: introduce migration primitives to balloon pages Rafael Aquini
2012-11-11 19:01   ` Rafael Aquini
2012-11-11 19:01 ` Rafael Aquini
2012-11-11 19:01 ` [PATCH v12 6/7] mm: introduce putback_movable_pages() Rafael Aquini
2012-11-11 19:01 ` Rafael Aquini
2012-11-11 19:01   ` Rafael Aquini
2012-11-11 19:01 ` [PATCH v12 7/7] mm: add vm event counters for balloon pages compaction Rafael Aquini
2012-11-11 19:01 ` Rafael Aquini
2012-11-11 19:01   ` Rafael Aquini
2012-11-11 19:18 ` [PATCH v12 0/7] make balloon pages movable by compaction Rafael Aquini
2012-11-11 19:18 ` Rafael Aquini
2012-11-11 19:18   ` Rafael Aquini

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