linux-kernel - Re: [x86/context_tracking] db23da8b95: inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage.

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Date:	Mon, 2 Nov 2015 13:19:20 +0100
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Fengguang Wu <fengguang.wu@...el.com>
Cc:	LKP <lkp@...org>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [x86/context_tracking] db23da8b95: inconsistent {IN-HARDIRQ-W} ->
 {HARDIRQ-ON-W} usage.

Hi Fengguang,

this patch is not ready, and is left for 4.5; see Andy's comment at
http://permalink.gmane.org/gmane.linux.kernel/2072877.  Only the other
two are.

I'm sorry for the inconvenience.

Thanks,

Paolo

On 02/11/2015 13:11, Fengguang Wu wrote:
> Hi Paolo,
> 
> FYI, here is another bisect result.
> 
> https://github.com/0day-ci/linux Paolo-Bonzini/context_tracking-remove-duplicate-enabled-check/20151028-094317
> 
> commit db23da8b95ece9b57d4cfd63f5ee10502f1af0c8
> Author:     Paolo Bonzini <pbonzini@...hat.com>
> AuthorDate: Wed Oct 28 02:39:57 2015 +0100
> Commit:     0day robot <fengguang.wu@...el.com>
> CommitDate: Wed Oct 28 09:43:20 2015 +0800
> 
>     x86: context_tracking: avoid irq_save/irq_restore on kernel entry and exit
>     
>     x86 always calls user_enter and user_exit with interrupt disabled.
>     Therefore, it is not necessary to check for exceptions, nor to
>     save/restore the IRQ state, when context tracking functions are
>     called by guest_enter and guest_exit.
>     
>     Use the previously introduced __context_tracking_entry and
>     __context_tracking_exit.
>     
>     Cc: Andy Lutomirski <luto@...nel.org>
>     Cc: Frederic Weisbecker <fweisbec@...il.com>
>     Cc: Rik van Riel <riel@...hat.com>
>     Cc: Paul McKenney <paulmck@...ux.vnet.ibm.com>
>     Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
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