From: Al Viro <viro@ZenIV.linux.org.uk>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [RFC] get_write_access()/deny_write_access() without inode->i_lock
Date: Mon, 20 Jun 2011 18:03:05 +0100 [thread overview]
Message-ID: <20110620170305.GW11521@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20110620164211.GV11521@ZenIV.linux.org.uk>
On Mon, Jun 20, 2011 at 05:42:11PM +0100, Al Viro wrote:
> BTW, atomic_add_unless/atomic_inc_not_zero is done as read/cmpxchg on
> everything I've checked, including alpha and sparc. I suspect that
> it's seriously suboptimal there...
Actually, on sparc it's probably fine. alpha, OTOH, probably ought to switch
to something similar to what ppc is doing...
next prev parent reply other threads:[~2011-06-20 17:03 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-19 23:51 [RFC] get_write_access()/deny_write_access() without inode->i_lock Al Viro
2011-06-20 12:47 ` David Howells
2011-06-20 13:18 ` Al Viro
2011-06-20 13:20 ` David Howells
2011-06-20 13:20 ` David Howells
2011-06-20 13:21 ` Frantisek Hrbata
2011-06-20 14:15 ` Al Viro
2011-06-20 15:55 ` Linus Torvalds
2011-06-20 15:55 ` Linus Torvalds
2011-06-20 16:13 ` Al Viro
2011-06-20 16:22 ` Linus Torvalds
2011-06-20 16:42 ` Al Viro
2011-06-20 17:03 ` Al Viro [this message]
2011-06-20 19:47 ` Andi Kleen
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