From: Bharata B Rao <bharata@linux.vnet.ibm.com>
To: Eric Blake <eblake@redhat.com>
Cc: aik@ozlabs.ru, stewart@linux.vnet.ibm.com, qemu-devel@nongnu.org,
"Andreas Färber" <afaerber@suse.de>,
agraf@suse.de
Subject: Re: [Qemu-devel] [PATCH v2] ppc: Force CPU threads count to be a power of 2.
Date: Wed, 19 Mar 2014 08:17:52 +0530 [thread overview]
Message-ID: <20140319024752.GB11069@in.ibm.com> (raw)
In-Reply-To: <53172DC1.9070505@redhat.com>
On Wed, Mar 05, 2014 at 06:59:29AM -0700, Eric Blake wrote:
> On 03/05/2014 01:32 AM, Bharata B Rao wrote:
> > PowerPC kernel expects the number of SMT threads in a core to be a power
> > of 2. Since QEMU doesn't enforce this, it leads to an early guest kernel
> > crash if invalid threads count is specified.
> >
> > Prevent this crash and make it a graceful exit from QEMU itself by
> > validating the user supplied threads count.
> >
> > Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
> > ---
> > Changes in v2: Use is_power_of_2() from QEMU itself instead of depending
> > on libm.
> > v1: https://lists.gnu.org/archive/html/qemu-devel/2014-03/msg00660.html
> > v0: https://lists.gnu.org/archive/html/qemu-devel/2014-03/msg00355.html
>
> Reviewed-by: Eric Blake <eblake@redhat.com>
> Reviewed-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Alexander/Andreas,
Could you take this patch into your tree ?
Regards,
Bharata.
next prev parent reply other threads:[~2014-03-19 2:46 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-05 8:32 [Qemu-devel] [PATCH v2] ppc: Force CPU threads count to be a power of 2 Bharata B Rao
2014-03-05 13:59 ` Eric Blake
2014-03-19 2:47 ` Bharata B Rao [this message]
2014-03-19 22:58 ` Andreas Färber
2014-03-05 22:51 ` Stewart Smith
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