From: William Lee Irwin III <wli@holomorphy.com>
To: "David S. Miller" <davem@redhat.com>
Cc: linux-kernel@vger.kernel.org, rusty@rustcorp.com.au
Subject: Re: [patchset] Lockfree fd lookup 0 of 5
Date: Mon, 2 Aug 2004 19:04:59 -0700 [thread overview]
Message-ID: <20040803020459.GV2334@holomorphy.com> (raw)
In-Reply-To: <20040802161514.54f02f60.davem@redhat.com>
On Mon, 2 Aug 2004 14:01:19 -0700 William Lee Irwin III wrote:
>> I've found unusual results in this area. e.g. it does appear to matter
>> for mapping->tree_lock for database workloads that heavily share a
>> given file and access it in parallel. The radix tree walk, though
>> intuitively short, is long enough to make the rwlock a win in the
>> database-oriented uses and microbenchmarks starting around 4x.
On Mon, Aug 02, 2004 at 04:15:14PM -0700, David S. Miller wrote:
> Thanks for the data point, because I had this patch I had sent
> to Rusty for 2.7.x which ripped rwlocks entirely out of the
> kernel. We might have to toss that idea :-)
In all honesty, I'd rather use RCU, but that's a little more work than
most RCU conversions.
-- wli
next prev parent reply other threads:[~2004-08-03 2:05 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-02 10:10 [patchset] Lockfree fd lookup 0 of 5 Ravikiran G Thirumalai
2004-08-02 10:13 ` [patchset] Lockfree fd lookup 1 " Ravikiran G Thirumalai
2004-08-02 13:38 ` Christoph Hellwig
2004-08-02 16:12 ` viro
2004-08-03 0:44 ` Greg KH
2004-08-02 10:16 ` [patchset] Lockfree fd lookup 2 " Ravikiran G Thirumalai
2004-08-03 0:43 ` Greg KH
2004-08-03 6:28 ` Ravikiran G Thirumalai
2004-08-03 6:44 ` Greg KH
2004-08-03 7:41 ` Ravikiran G Thirumalai
2004-08-02 10:18 ` [patchset] Lockfree fd lookup 0 " Ravikiran G Thirumalai
2004-08-02 10:20 ` [patchset] Lockfree fd lookup 4 " Ravikiran G Thirumalai
2004-08-02 10:23 ` [patchset] Lockfree fd lookup 5 " Ravikiran G Thirumalai
2004-08-02 16:56 ` [patchset] Lockfree fd lookup 0 " viro
2004-08-02 20:07 ` David S. Miller
2004-08-02 21:01 ` William Lee Irwin III
2004-08-02 23:15 ` David S. Miller
2004-08-03 2:04 ` William Lee Irwin III [this message]
2004-08-03 9:23 ` Ravikiran G Thirumalai
2004-08-03 9:35 ` Ravikiran G Thirumalai
2004-08-03 10:17 ` Dipankar Sarma
2004-08-03 10:06 ` viro
-- strict thread matches above, loose matches on Subject: below --
2004-08-02 18:50 Manfred Spraul
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