linux-kernel - Re: [PATCH] Add a text

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Message-ID: <20131130173118.GA26278@redhat.com>
Date:	Sat, 30 Nov 2013 18:31:18 +0100
From:	Oleg Nesterov <oleg@...hat.com>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	torvalds@...ux-foundation.org, x86@...nel.org,
	Andi Kleen <ak@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...nel.org>,
	Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH] Add a text_poke syscall v2

On 11/30, Oleg Nesterov wrote:
>
> First of all, this smp_wmb() is not clear.

Yes, but...

> However, do_int3() does preempt_conditional_sti() and this looks
> as if it can be called with irqs enabled?

Ah, please ignore, I misread preempt_conditional_sti(). It enables
irqs if they were enabled before the exception, unless I misread it
again.

Oleg.

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