From: "Ahmed S. Darwish" <darwish.07-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> To: "H. Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org> Cc: "Willy Tarreau" <wtarreau-Dj75qbTlC0E76Z2rM5mHXA@public.gmane.org>, "Dirk Hohndel" <hohndel-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>, "Frédéric Weisbecker" <fweisbec-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, FBDEV-ML <linux-fbdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, IDE-ML <linux-ide-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, "Randy Dunlap" <rdunlap-/UHa2rfvQTnk1uMJSBkQmQ@public.gmane.org>, "James Bottomley" <James.Bottomley-l3A5Bk7waGM@public.gmane.org>, X86-ML <x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, "Ingo Molnar" <mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, "Ingo Molnar" <mingo-X9Un+BFzKDI@public.gmane.org>, "Jeff Garzik" <jgarzik-e+AXbWqSrlAAvxtiuMwx3w@public.gmane.org>, "Vivek Goyal" <vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, "Peter Zijlstra" <a.p.zijlstra-/NLkJaSkS4VmR6Xm/wNWPw@public.gmane.org>, Dirk.Hohndel-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, "Borislav Petkov" <bp-Gina5bIWoIWzQB+pC5nmwQ@public.gmane.org>, "Dave Jones" <davej-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, "Thomas Gleixner" <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>, "Mark Lord" <kernel-R6A+fiHC8nRWk0Htik3J/w@public.gmane.org>, "Arjan van de Ven" <arjan-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>, "Tony Luck" <tony.luck-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>, KEXEC-ML <kexec-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>, LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, "Haren Myneni" <hbabu-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>, "Eric Biederman" <ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org> Subject: Re: [PATCH 0/2][concept RFC] x86: BIOS-save kernel log to disk upon panic Date: Thu, 27 Jan 2011 07:26:39 +0200 [thread overview] Message-ID: <20110127052639.GA16289@laptop> (raw) In-Reply-To: <4D40F81E.1030009-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org> On Wed, Jan 26, 2011 at 08:44:14PM -0800, H. Peter Anvin wrote: > On 01/26/2011 06:13 PM, Vivek Goyal wrote: >>> >>> - Use kexec/kdump. I wonder though, can kexec work on early panics? The >>> kind where the disk itself might not yet be initialized? >> >> As of today kexec/kdump does not work with early panics as kdump kernel >> needs to be loaded in reserved memory and that action happens once the >> first kernel has booted. >> >> There is so much to it that I really don't think that modifying bootloaders to >> do all that might not trivial and more importantly I think it probably is not >> worth the effort. >> > > It's really not all that hard, actually. > Nice, I'll try prototyping this using syslinux and kexec: this seems the safest path so far. Further details are in my first reply to Vivek. > -hpa thanks, -- Darwish http://darwish.07.googlepages.com
WARNING: multiple messages have this Message-ID (diff)
From: "Ahmed S. Darwish" <darwish.07@gmail.com> To: "H. Peter Anvin" <hpa@zytor.com> Cc: "Willy Tarreau" <wtarreau@hera.kernel.org>, "Dirk Hohndel" <hohndel@infradead.org>, "Frédéric Weisbecker" <fweisbec@gmail.com>, FBDEV-ML <linux-fbdev@vger.kernel.org>, IDE-ML <linux-ide@vger.kernel.org>, "Randy Dunlap" <rdunlap@xenotime.net>, "James Bottomley" <James.Bottomley@suse.de>, X86-ML <x86@kernel.org>, "Ingo Molnar" <mingo@redhat.com>, "Ingo Molnar" <mingo@elte.hu>, "Jeff Garzik" <jgarzik@pobox.com>, "Vivek Goyal" <vgoyal@redhat.com>, "Peter Zijlstra" <a.p.zijlstra@chello.nl>, Dirk.Hohndel@intel.com, "Borislav Petkov" <bp@alien8.de>, "Dave Jones" <davej@redhat.com>, "Thomas Gleixner" <tglx@linutronix.de>, "Mark Lord" <kernel@teksavvy.com>, "Arjan van de Ven" <arjan@infradead.org>, "Tony Luck" <tony.luck@intel.com>, KEXEC-ML <kexec@lists.infradead.org>, LKML <linux-kernel@vger.kernel.org>, "Haren Myneni" <hbabu@us.ibm.com>, "Eric Biederman" <ebiederm@xmission.com>, "Tejun Heo" <tj@kernel.org>, "Andrew Morton" <akpm@linux-foundation.org>, "Linus Torvalds" <torvalds@linux-foundation.org>, "Willy Tarreau" <w@1wt.eu> Subject: Re: [PATCH 0/2][concept RFC] x86: BIOS-save kernel log to disk upon panic Date: Thu, 27 Jan 2011 07:26:39 +0200 [thread overview] Message-ID: <20110127052639.GA16289@laptop> (raw) In-Reply-To: <4D40F81E.1030009@zytor.com> On Wed, Jan 26, 2011 at 08:44:14PM -0800, H. Peter Anvin wrote: > On 01/26/2011 06:13 PM, Vivek Goyal wrote: >>> >>> - Use kexec/kdump. I wonder though, can kexec work on early panics? The >>> kind where the disk itself might not yet be initialized? >> >> As of today kexec/kdump does not work with early panics as kdump kernel >> needs to be loaded in reserved memory and that action happens once the >> first kernel has booted. >> >> There is so much to it that I really don't think that modifying bootloaders to >> do all that might not trivial and more importantly I think it probably is not >> worth the effort. >> > > It's really not all that hard, actually. > Nice, I'll try prototyping this using syslinux and kexec: this seems the safest path so far. Further details are in my first reply to Vivek. > -hpa thanks, -- Darwish http://darwish.07.googlepages.com _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec
next prev parent reply other threads:[~2011-01-27 5:26 UTC|newest] Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-01-25 13:47 [PATCH 0/2][concept RFC] x86: BIOS-save kernel log to disk upon panic Ahmed S. Darwish 2011-01-25 13:51 ` [PATCH -next 1/2][RFC] x86: Saveoops: Switch to real-mode and call BIOS Ahmed S. Darwish 2011-01-25 17:26 ` H. Peter Anvin 2011-01-25 13:53 ` [PATCH -next 2/2][RFC] x86: Saveoops: Reserve low memory and register code Ahmed S. Darwish 2011-01-25 17:29 ` H. Peter Anvin 2011-01-26 9:04 ` Ahmed S. Darwish 2011-01-25 14:09 ` [PATCH 0/2][concept RFC] x86: BIOS-save kernel log to disk upon panic Ingo Molnar 2011-01-25 15:08 ` Tejun Heo 2011-01-25 17:33 ` H. Peter Anvin 2011-01-26 11:44 ` Ahmed S. Darwish 2011-02-03 14:36 ` Pavel Machek 2011-02-03 15:28 ` H. Peter Anvin 2011-02-03 17:57 ` Ingo Molnar 2011-02-03 21:07 ` H. Peter Anvin 2011-01-25 15:36 ` Ahmed S. Darwish 2011-01-25 16:02 ` James Bottomley 2011-01-25 17:05 ` Ahmed S. Darwish 2011-01-25 17:20 ` James Bottomley 2011-01-25 22:10 ` Mark Lord 2011-01-25 22:16 ` Randy Dunlap 2011-01-25 22:45 ` Jeff Garzik 2011-01-25 22:58 ` H. Peter Anvin 2011-01-26 0:26 ` Jeff Garzik 2011-01-31 2:59 ` Rusty Russell 2011-01-31 10:45 ` Ingo Molnar 2011-01-25 17:32 ` Tony Luck 2011-01-25 17:36 ` H. Peter Anvin 2011-01-25 19:04 ` Jeff Garzik 2011-01-25 14:49 ` Tejun Heo 2011-01-28 7:59 ` Jan Ceuleers 2011-01-25 20:25 ` Linus Torvalds [not found] ` <AANLkTinU0KYiCd4p=z+=ojbkeEoT2G+CAYvdRU02KJEn-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2011-01-26 12:49 ` Ahmed S. Darwish 2011-01-26 12:49 ` Ahmed S. Darwish 2011-01-26 12:58 ` Ingo Molnar 2011-01-26 12:58 ` Ingo Molnar [not found] ` <20110126125813.GA26952-X9Un+BFzKDI@public.gmane.org> 2011-01-26 13:34 ` Ahmed S. Darwish 2011-01-26 13:34 ` Ahmed S. Darwish 2011-01-26 14:00 ` Ingo Molnar 2011-01-26 14:00 ` Ingo Molnar [not found] ` <20110126140030.GB30064-X9Un+BFzKDI@public.gmane.org> 2011-01-27 4:35 ` H. Peter Anvin 2011-01-27 4:35 ` H. Peter Anvin [not found] ` <4D40F5FD.6090507-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org> 2011-01-27 11:41 ` Ingo Molnar 2011-01-27 11:41 ` Ingo Molnar [not found] ` <20110127114113.GB20279-X9Un+BFzKDI@public.gmane.org> 2011-01-27 15:47 ` Eric W. Biederman 2011-01-27 15:47 ` Eric W. Biederman [not found] ` <m1aaimxs9h.fsf-+imSwln9KH6u2/kzUuoCbdi2O/JbrIOy@public.gmane.org> 2011-01-27 16:12 ` H. Peter Anvin 2011-01-27 16:12 ` H. Peter Anvin 2011-01-26 23:07 ` Luck, Tony 2011-01-26 23:07 ` Luck, Tony 2011-01-26 23:07 ` [PATCH 0/2][concept RFC] x86: BIOS-save kernel log to disk upon Luck, Tony 2011-01-26 23:07 ` [PATCH 0/2][concept RFC] x86: BIOS-save kernel log to disk upon panic Luck, Tony [not found] ` <987664A83D2D224EAE907B061CE93D53019438EABF-osO9UTpF0URqS6EAlXoojrfspsVTdybXVpNB7YpNyf8@public.gmane.org> 2011-01-26 23:16 ` Dave Jones 2011-01-26 23:16 ` Dave Jones [not found] ` <20110126231620.GA14807-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> 2011-01-26 23:21 ` Luck, Tony 2011-01-26 23:21 ` Luck, Tony [not found] ` <20110126233033.GB14807@redhat.com> [not found] ` <987664A83D2D224EAE907B061CE93D53019438EBB6@orsmsx505.amr.corp.intel.com> [not found] ` <4D40F7F1.3020509@zytor.com> [not found] ` <20110127120039.GD20279@elte.hu> 2011-01-27 18:35 ` Luck, Tony 2011-01-27 18:35 ` [PATCH 0/2][concept RFC] x86: BIOS-save kernel log to disk upon Luck, Tony 2011-01-27 18:35 ` [PATCH 0/2][concept RFC] x86: BIOS-save kernel log to disk upon panic Luck, Tony [not found] ` <4D4197CB.9070201@zytor.com> [not found] ` <20110127162429.GB26437@elte.hu> 2011-01-27 18:56 ` Luck, Tony 2011-01-27 18:56 ` [PATCH 0/2][concept RFC] x86: BIOS-save kernel log to disk upon Luck, Tony 2011-01-27 18:56 ` [PATCH 0/2][concept RFC] x86: BIOS-save kernel log to disk upon panic Luck, Tony 2011-01-27 1:09 ` Ahmed S. Darwish 2011-01-27 1:09 ` Ahmed S. Darwish [not found] ` <20110127021338.GA20334@redhat.com> [not found] ` <20110127021338.GA20334-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> 2011-01-27 3:33 ` Ahmed S. Darwish 2011-01-27 3:33 ` Ahmed S. Darwish 2011-01-27 4:44 ` H. Peter Anvin 2011-01-27 4:44 ` H. Peter Anvin [not found] ` <4D40F81E.1030009-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org> 2011-01-27 5:26 ` Ahmed S. Darwish [this message] 2011-01-27 5:26 ` Ahmed S. Darwish 2011-01-27 7:51 ` Eric W. Biederman 2011-01-27 7:51 ` Eric W. Biederman 2011-02-02 11:13 ` Ahmed S. Darwish 2011-02-02 11:13 ` Ahmed S. Darwish 2011-02-02 11:13 ` [PATCH 0/2][concept RFC] x86: BIOS-save kernel log to disk Ahmed S. Darwish 2011-02-02 11:13 ` [PATCH 0/2][concept RFC] x86: BIOS-save kernel log to disk upon panic Ahmed S. Darwish
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