From: Andi Kleen <andi@firstfloor.org>
To: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Cc: Andi Kleen <andi@firstfloor.org>,
linux-kernel@vger.kernel.org, fengguang.wu@intel.com,
linux-mm@kvack.org, Andi Kleen <ak@linux.intel.com>
Subject: Re: [PATCH 2/4] HWPOISON: Copy si_addr_lsb to user
Date: Thu, 7 Oct 2010 09:36:33 +0200 [thread overview]
Message-ID: <20101007073633.GF5010@basil.fritz.box> (raw)
In-Reply-To: <4CAD6943.2020805@jp.fujitsu.com>
On Thu, Oct 07, 2010 at 03:31:31PM +0900, Hidetoshi Seto wrote:
> (2010/10/07 5:48), Andi Kleen wrote:
> > From: Andi Kleen <ak@linux.intel.com>
> >
> > The original hwpoison code added a new siginfo field si_addr_lsb to
> > pass the granuality of the fault address to user space. Unfortunately
> > this field was never copied to user space. Fix this here.
> >
> > I added explicit checks for the MCEERR codes to avoid having
> > to patch all potential callers to initialize the field.
>
> Now QEMU uses signalfd to catch the SIGBUS delivered to the
> main thread, so I think similar fix to copy lsb to user is
> required for signalfd too.
Good catch. I don't think qemu uses this today, but it should
be fixed there too for .37 at least.
-Andi
WARNING: multiple messages have this Message-ID (diff)
From: Andi Kleen <andi@firstfloor.org>
To: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Cc: Andi Kleen <andi@firstfloor.org>,
linux-kernel@vger.kernel.org, fengguang.wu@intel.com,
linux-mm@kvack.org, Andi Kleen <ak@linux.intel.com>
Subject: Re: [PATCH 2/4] HWPOISON: Copy si_addr_lsb to user
Date: Thu, 7 Oct 2010 09:36:33 +0200 [thread overview]
Message-ID: <20101007073633.GF5010@basil.fritz.box> (raw)
In-Reply-To: <4CAD6943.2020805@jp.fujitsu.com>
On Thu, Oct 07, 2010 at 03:31:31PM +0900, Hidetoshi Seto wrote:
> (2010/10/07 5:48), Andi Kleen wrote:
> > From: Andi Kleen <ak@linux.intel.com>
> >
> > The original hwpoison code added a new siginfo field si_addr_lsb to
> > pass the granuality of the fault address to user space. Unfortunately
> > this field was never copied to user space. Fix this here.
> >
> > I added explicit checks for the MCEERR codes to avoid having
> > to patch all potential callers to initialize the field.
>
> Now QEMU uses signalfd to catch the SIGBUS delivered to the
> main thread, so I think similar fix to copy lsb to user is
> required for signalfd too.
Good catch. I don't think qemu uses this today, but it should
be fixed there too for .37 at least.
-Andi
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next prev parent reply other threads:[~2010-10-07 7:36 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-06 20:48 HWPoison fixes for 2.6.36 Andi Kleen
2010-10-06 20:48 ` Andi Kleen
2010-10-06 20:48 ` [PATCH 1/4] page-types.c: fix name of unpoison interface Andi Kleen
2010-10-06 20:48 ` Andi Kleen
2010-10-06 20:48 ` [PATCH 2/4] HWPOISON: Copy si_addr_lsb to user Andi Kleen
2010-10-06 20:48 ` Andi Kleen
2010-10-07 0:27 ` Naoya Horiguchi
2010-10-07 0:27 ` Naoya Horiguchi
2010-10-07 6:31 ` Hidetoshi Seto
2010-10-07 6:31 ` Hidetoshi Seto
2010-10-07 7:36 ` Andi Kleen [this message]
2010-10-07 7:36 ` Andi Kleen
2010-10-08 17:09 ` Ralf Baechle
2010-10-08 17:09 ` Ralf Baechle
2010-10-08 17:32 ` Andi Kleen
2010-10-08 17:32 ` Andi Kleen
2010-10-06 20:49 ` [PATCH 3/4] HWPOISON: Report correct address granuality for AO huge page errors Andi Kleen
2010-10-06 20:49 ` Andi Kleen
2010-10-07 0:31 ` Naoya Horiguchi
2010-10-07 0:31 ` Naoya Horiguchi
2010-10-07 7:38 ` Andi Kleen
2010-10-07 7:38 ` Andi Kleen
2010-10-07 8:41 ` Naoya Horiguchi
2010-10-07 8:41 ` Naoya Horiguchi
2010-10-07 8:45 ` Andi Kleen
2010-10-07 8:45 ` Andi Kleen
2010-10-07 8:48 ` Naoya Horiguchi
2010-10-07 8:48 ` Naoya Horiguchi
2010-10-07 8:58 ` Andi Kleen
2010-10-07 8:58 ` Andi Kleen
2010-10-07 1:50 ` Wu Fengguang
2010-10-07 1:50 ` Wu Fengguang
2010-10-06 20:49 ` [PATCH 4/4] HWPOISON: Stop shrinking at right page count Andi Kleen
2010-10-06 20:49 ` Andi Kleen
2010-10-07 1:53 ` Wu Fengguang
2010-10-07 1:53 ` Wu Fengguang
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