From: Suresh Siddha <suresh.b.siddha@intel.com>
To: Jonathan Nieder <jrnieder@gmail.com>
Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org,
Greg KH <gregkh@linuxfoundation.org>,
linbao.zhang@hp.com
Subject: Re: [stable 2.6.32..2.6.34] x86, ioapic: initialize nr_ioapic_registers early in mp_register_ioapic()
Date: Wed, 24 Oct 2012 11:37:52 -0700 [thread overview]
Message-ID: <1351103872.6017.80.camel@sbsiddha-desk.sc.intel.com> (raw)
In-Reply-To: <20121024182546.GB3338@elie.Belkin>
On Wed, 2012-10-24 at 11:25 -0700, Jonathan Nieder wrote:
> Hi Suresh,
>
> Suresh Siddha wrote:
>
> [...]
> > This problem doesn't happen with more recent kernels and closer
> > look at the 2.6.32 kernel shows that the code which masks
> > the IO-APIC RTE's is not working as expected as the nr_ioapic_registers
> > for each IO-APIC is not yet initialized at this point. In the later
> > kernels we initialize nr_ioapic_registers much before and
> > everything works as expected.
> >
> > For 2.6.[32..34] kernels, fix this issue by initializing
> > nr_ioapic_registers early in mp_register_ioapic()
> >
> > Relevant upstream commit info:
> >
> > commit 7716a5c4ff5f1f3dc5e9edcab125cbf7fceef0af
>
> Why not cherry-pick 7716a5c4ff5 in full?
As that depends on the other commits like:
commit 4b6b19a1c7302477653d799a53d48063dd53d555
Author: Eric W. Biederman <ebiederm@xmission.com>
Date: Tue Mar 30 01:07:08 2010 -0700
Wanted to keep the changes as minimal as possible.
thanks,
suresh
next prev parent reply other threads:[~2012-10-24 18:35 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-24 18:17 [stable 2.6.32..2.6.34] x86, ioapic: initialize nr_ioapic_registers early in mp_register_ioapic() Suresh Siddha
2012-10-24 18:25 ` Jonathan Nieder
2012-10-24 18:37 ` Suresh Siddha [this message]
2012-10-24 19:18 ` Jonathan Nieder
2012-10-24 19:41 ` [RFC/PATCH 2.6.32.y 0/3] " Jonathan Nieder
2012-10-24 19:42 ` [PATCH 1/3] x86, ioapic: Teach mp_register_ioapic to compute a global gsi_end Jonathan Nieder
2012-10-24 19:42 ` [PATCH 2/3] x86, ioapic: In mpparse use mp_register_ioapic Jonathan Nieder
2012-10-24 19:43 ` [PATCH 3/3] x86, ioapic: Move nr_ioapic_registers calculation to mp_register_ioapic Jonathan Nieder
2012-10-24 22:24 ` [RFC/PATCH 2.6.32.y 0/3] Re: [stable 2.6.32..2.6.34] x86, ioapic: initialize nr_ioapic_registers early in mp_register_ioapic() Suresh Siddha
2012-10-24 22:31 ` Jonathan Nieder
2012-10-25 1:25 ` Eric W. Biederman
2012-11-01 7:50 ` Willy Tarreau
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