linux-kernel - Re: nonboot cpu on SMP suspend

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-Id: <200903190000.33572.rjw@sisk.pl>
Date:	Thu, 19 Mar 2009 00:00:31 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Li Yang <leoli@...escale.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: nonboot cpu on SMP suspend

On Wednesday 18 March 2009, Li Yang wrote:
> Hi all,
> 
> I'm curious why we need to un-plug all the nonboot cpus before suspend
> and start them all over again after the suspend(ACPI sleep)?  I mean
> if we can bring the booting cpu back to the exact state as before
> suspend, why can't we just do the same for non-booting cpus?  And that
> will be much faster.  Any thought?  Thanks.

Because we need to enter the BIOS with one CPU on-line only.

Thanks,
Rafael
--
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/