From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm: trigger panic on bad page or PTE states if panic_on_oops
Date: Tue, 17 Mar 2015 21:40:53 +0200 [thread overview]
Message-ID: <20150317194053.GA27910@node.dhcp.inet.fi> (raw)
In-Reply-To: <55086217.6060802@yandex-team.ru>
On Tue, Mar 17, 2015 at 08:19:19PM +0300, Konstantin Khlebnikov wrote:
> On 16.03.2015 15:15, Kirill A. Shutemov wrote:
> >On Mon, Mar 16, 2015 at 12:12:54PM +0100, Christian Borntraeger wrote:
> >>Am 16.03.2015 um 12:00 schrieb Kirill A. Shutemov:
> >>>On Mon, Mar 16, 2015 at 09:37:01AM +0100, Christian Borntraeger wrote:
> >>>>while debugging a memory management problem it helped a lot to
> >>>>get a system dump as early as possible for bad page states.
> >>>>
> >>>>Lets assume that if panic_on_oops is set then the system should
> >>>>not continue with broken mm data structures.
> >>>
> >>>bed_pte is not an oops.
> >>
> >>I know that this is not an oops, but semantically it is like one. I certainly
> >>want to a way to hard stop the system if something like that happens.
> >>
> >>Would something like panic_on_mm_error be better?
> >
> >Or panic_on_taint=<mask> where <mask> is bit-mask of TAINT_* values.
> >
> >The problem is that TAINT_* will effectevely become part of kernel ABI
> >and I'm not sure it's good idea.
>
> Taint bits have associated letters: for example panic_on_taint=OP
> panic on out-of-tree or propriate =)
Works for me.
--
Kirill A. Shutemov
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prev parent reply other threads:[~2015-03-17 19:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-16 8:37 [PATCH] mm: trigger panic on bad page or PTE states if panic_on_oops Christian Borntraeger
2015-03-16 11:00 ` Kirill A. Shutemov
2015-03-16 11:12 ` Christian Borntraeger
2015-03-16 12:15 ` Kirill A. Shutemov
2015-03-17 17:19 ` Konstantin Khlebnikov
2015-03-17 19:40 ` Kirill A. Shutemov [this message]
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