From: Anton Blanchard <anton@samba.org>
To: Stephen Hemminger <shemminger@osdl.org>,
Linus Torvalds <torvalds@transmeta.com>,
Andrea Arcangeli <andrea@suse.de>, Andrew Morton <akpm@digeo.com>,
Andi Kleen <ak@suse.de>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] (1/4) 2.5.59 fast reader/writer lock for gettimeofday
Date: Wed, 29 Jan 2003 18:26:22 +1100 [thread overview]
Message-ID: <20030129072622.GA18250@krispykreme> (raw)
In-Reply-To: <20030128230639.A17385@twiddle.net>
> These need to be mb(), not wmb(), if you want the bits in between
> to actually happen in between, as with your xtime example. At
> present there's nothing stoping xtime from being *read* before
> your read from pre_sequence happens.
But with frlocks we synchronise writers with a spinlock, so shouldnt it
provide that synchronisation?
Anton
next prev parent reply other threads:[~2003-01-29 7:21 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-28 23:42 [PATCH] (1/4) 2.5.59 fast reader/writer lock for gettimeofday Stephen Hemminger
2003-01-29 7:06 ` Richard Henderson
2003-01-29 7:26 ` Anton Blanchard [this message]
2003-01-29 8:41 ` Andrew Morton
2003-01-30 1:15 ` frlock and barrier discussion Stephen Hemminger
2003-01-30 1:29 ` Andrea Arcangeli
2003-01-30 1:41 ` Richard Henderson
2003-01-30 1:52 ` Andrea Arcangeli
2003-01-31 0:41 ` Richard Henderson
2003-01-31 0:57 ` Andrea Arcangeli
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