From: Jiri Slaby <jslaby@suse.cz>
To: Hugh Dickins <hughd@google.com>
Cc: Michel Lespinasse <walken@google.com>,
Sasha Levin <levinsasha928@gmail.com>,
linux-mm@kvack.org, riel@redhat.com, peterz@infradead.org,
aarcange@redhat.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, 22 Sep 2012 09:19:40 +0200 [thread overview]
Message-ID: <505D668C.7010206@suse.cz> (raw)
In-Reply-To: <alpine.LSU.2.00.1209161130460.5591@eggly.anvils>
On 09/16/2012 09:07 PM, Hugh Dickins wrote:
>> What was the way that
>> Hugh used to reproduce the other issue?
>
> I've lost track of which issue is "other".
The other was meant to be the BUG I hit.
> To reproduce Sasha's interval_tree.c warnings, all I had to do was switch
> on CONFIG_DEBUG_VM_RB (I regret not having done so before) and boot up.
>
> I didn't look to see what was doing the mremap which caused the warning
> until now: surprisingly, it's microcode_ctl. I've not made much effort
> to get the right set of sources and work out why that would be using
> mremap (a realloc inside a library?).
>
> I failed to reproduce your BUG in huge_memory.c, but what I was trying
> was SuSE update via yast2, on several machines; but perhaps because
> they were all fairly close to up-to-date, I didn't hit a problem.
> (That was before I turned on DEBUG_VM_RB for Sasha's.)
The good news are that I cannot reproduce either with the patch applied.
thanks,
--
js
suse labs
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WARNING: multiple messages have this Message-ID (diff)
From: Jiri Slaby <jslaby@suse.cz>
To: Hugh Dickins <hughd@google.com>
Cc: Michel Lespinasse <walken@google.com>,
Sasha Levin <levinsasha928@gmail.com>,
linux-mm@kvack.org, riel@redhat.com, peterz@infradead.org,
aarcange@redhat.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, 22 Sep 2012 09:19:40 +0200 [thread overview]
Message-ID: <505D668C.7010206@suse.cz> (raw)
In-Reply-To: <alpine.LSU.2.00.1209161130460.5591@eggly.anvils>
On 09/16/2012 09:07 PM, Hugh Dickins wrote:
>> What was the way that
>> Hugh used to reproduce the other issue?
>
> I've lost track of which issue is "other".
The other was meant to be the BUG I hit.
> To reproduce Sasha's interval_tree.c warnings, all I had to do was switch
> on CONFIG_DEBUG_VM_RB (I regret not having done so before) and boot up.
>
> I didn't look to see what was doing the mremap which caused the warning
> until now: surprisingly, it's microcode_ctl. I've not made much effort
> to get the right set of sources and work out why that would be using
> mremap (a realloc inside a library?).
>
> I failed to reproduce your BUG in huge_memory.c, but what I was trying
> was SuSE update via yast2, on several machines; but perhaps because
> they were all fairly close to up-to-date, I didn't hit a problem.
> (That was before I turned on DEBUG_VM_RB for Sasha's.)
The good news are that I cannot reproduce either with the patch applied.
thanks,
--
js
suse labs
next prev parent reply other threads:[~2012-09-22 7:19 UTC|newest]
Thread overview: 59+ 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 ` Michel Lespinasse
2012-09-04 9:20 ` [PATCH 1/7] mm: interval tree updates Michel Lespinasse
2012-09-04 9:20 ` Michel Lespinasse
2012-09-07 22:13 ` Andrew Morton
2012-09-07 22:13 ` Andrew Morton
2012-09-07 22:29 ` Michel Lespinasse
2012-09-07 22:29 ` Michel Lespinasse
2012-09-07 22:55 ` Andrew Morton
2012-09-07 22:55 ` Andrew Morton
2012-09-07 23:26 ` Michel Lespinasse
2012-09-07 23:26 ` Michel Lespinasse
2012-09-08 4:45 ` Hillf Danton
2012-09-08 4:45 ` Hillf Danton
2012-09-07 23:26 ` Michel Lespinasse
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 9:20 ` Michel Lespinasse
2012-09-04 14:27 ` Andrea Arcangeli
2012-09-04 14:27 ` Andrea Arcangeli
2012-09-04 21:53 ` Michel Lespinasse
2012-09-04 21:53 ` Michel Lespinasse
2012-09-04 22:16 ` Andrea Arcangeli
2012-09-04 22:16 ` Andrea Arcangeli
2012-09-05 0:45 ` Michel Lespinasse
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 ` 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
2012-09-04 9:20 ` Michel Lespinasse
2012-09-05 0:51 ` 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 ` Michel Lespinasse
2012-09-04 9:20 ` [PATCH 6/7] mm: add CONFIG_DEBUG_VM_RB build option Michel Lespinasse
2012-09-04 9:20 ` Michel Lespinasse
2012-09-14 22:14 ` Sasha Levin
2012-09-14 22:14 ` Sasha Levin
2012-09-14 22:40 ` Sasha Levin
2012-09-14 22:40 ` Sasha Levin
2012-09-14 22:46 ` Michel Lespinasse
2012-09-14 22:46 ` Michel Lespinasse
2012-09-15 0:00 ` Michel Lespinasse
2012-09-15 0:00 ` Michel Lespinasse
2012-09-15 7:52 ` Jiri Slaby
2012-09-15 7:52 ` Jiri Slaby
2012-09-16 19:07 ` Hugh Dickins
2012-09-16 19:07 ` Hugh Dickins
2012-09-22 7:19 ` Jiri Slaby [this message]
2012-09-22 7:19 ` Jiri Slaby
2012-09-15 9:26 ` Sasha Levin
2012-09-15 9:26 ` Sasha Levin
2012-09-20 21:39 ` Fengguang Wu
2012-09-20 22:27 ` Hugh Dickins
2012-09-20 22:27 ` Hugh Dickins
2012-09-20 22:31 ` Fengguang Wu
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
2012-09-04 9:20 ` Michel Lespinasse
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