From: Philippe Gerum <rpm@xenomai.org>
To: Jan Kiszka <jan.kiszka@domain.hid>
Cc: adeos-main@gna.org, Xenomai-core@domain.hid
Subject: Re: [Xenomai-core] [PATCH] fix SYSENTER_CS modificaton race (was: [BUG] sep-related oops on 2.6.20)
Date: Thu, 04 Oct 2007 10:14:44 +0200 [thread overview]
Message-ID: <1191485684.20623.34.camel@domain.hid> (raw)
In-Reply-To: <46FB62F2.2010104@domain.hid>
On Thu, 2007-09-27 at 09:59 +0200, Jan Kiszka wrote:
> And here comes the solution:
>
> The attached patch fixes a race related to changing MSR_IA32_SYSENTER_CS
> when user space requested vm86[old]() services (I assume my X-server
> does so in the scenario above, maybe to call into the BIOS). We have to
> make sure that current->thread is always in sync with the MSR because we
> consult both in __switch_to, thus we have to enforce atomicity of the
> related code.
>
> The patch is for ipipe-1.8-08, but 1.10 is affected just as well.
>
Merged into both branches, thanks.
> Jan
>
--
Philippe.
prev parent reply other threads:[~2007-10-04 8:14 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-26 16:12 [Xenomai-core] [BUG] sep-related oops on 2.6.20 Jan Kiszka
2007-09-27 7:59 ` [Xenomai-core] [PATCH] fix SYSENTER_CS modificaton race (was: [BUG] sep-related oops on 2.6.20) Jan Kiszka
2007-10-04 8:14 ` Philippe Gerum [this message]
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