linux-kernel - Re: [Patch 1/4][kernel][slimdump] Add new elf-note of type NT

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 12 Oct 2011 02:20:32 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	"K.Prasad" <prasad@...ux.vnet.ibm.com>
Cc:	Borislav Petkov <bp@...en8.de>, Vivek Goyal <vgoyal@...hat.com>,
	linux-kernel@...r.kernel.org, crash-utility@...hat.com,
	kexec@...ts.infradead.org, Andi Kleen <andi@...stfloor.org>,
	"Luck, Tony" <tony.luck@...el.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>, anderson@...hat.com,
	tachibana@....nes.nec.co.jp, oomichi@....nes.nec.co.jp,
	Valdis.Kletnieks@...edu, Nick Bowler <nbowler@...iptictech.com>
Subject: Re: [Patch 1/4][kernel][slimdump] Add new elf-note of type NT_NOCOREDUMP to capture slimdump

> So, in any case we may not be able to disable machine-check exceptions
> (MCEs) only within the context of kexec'ed kernel. Let me know if I've
> missed something here.

You can disable signalling in the main machine check register,
then you won't get any machine check interrupts. No need to mess
with any CPU specific banks.

See the old mce tree that kernel.org ate for a patch that just did that
during the kcore copy.

-Andi
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/