linux-kernel - Re: [patch] convert aio event reap to use atomic-op instead of spin

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 12 Apr 2007 11:13:25 -0400
From:	Benjamin LaHaise <bcrl@...ck.org>
To:	Ken Chen <kenchen@...gle.com>
Cc:	Zach Brown <zach.brown@...cle.com>, akpm@...ux-foundation.org,
	linux-aio@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [patch] convert aio event reap to use atomic-op instead of spin_lock

On Thu, Apr 12, 2007 at 10:31:31AM -0400, Benjamin LaHaise wrote:
> On Thu, Apr 12, 2007 at 12:50:39AM -0700, Ken Chen wrote:
> > I ran through the autotest (with bug fix in the test code).  It passes
> > the regression tests. I made the following change since last rev:
> 
> By removing the spinlock around ring insertion, you've made it possible 
> for two events being inserted on different CPUs to end up creating 
> inconsistent state, as there is nothing which guarantees that resulting 
> event in the ring will be wholely one event or another.

Ignore that, I misread the function it was applied to.  -ENEEDCOFFEE.  Yes, 
that spinlock can go if we're doing cmpxchg().

		-ben
-- 
"Time is of no importance, Mr. President, only life is important."
Don't Email: <zyntrop@...ck.org>.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/