From: Wu Fengguang <fengguang.wu@intel.com>
To: Andrew Morton <akpm@linux-foundation.org>,
Andi Kleen <andi@firstfloor.org>
Cc: Tim Chen <tim.c.chen@intel.com>,
Li Shaohua <shaohua.li@intel.com>,
Wu Fengguang <fengguang.wu@intel.com>,
LKML <linux-kernel@vger.kernel.org>,
Linux Memory Management List <linux-mm@kvack.org>
Subject: [PATCH 0/3] reduce readahead overheads on tmpfs mmap page faults
Date: Tue, 26 Apr 2011 17:43:52 +0800 [thread overview]
Message-ID: <20110426094352.030753173@intel.com> (raw)
Andrew,
This kills unnessesary ra->mmap_miss and ra->prev_pos updates on every page
fault when the readahead is disabled.
They fix the cache line bouncing problem in the mosbench exim benchmark, which
does multi-threaded page faults on shared struct file on tmpfs.
Thanks,
Fengguang
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next reply other threads:[~2011-04-26 9:51 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-26 9:43 Wu Fengguang [this message]
2011-04-26 9:43 ` [PATCH 1/3] readahead: return early when readahead is disabled Wu Fengguang
2011-04-26 9:43 ` Wu Fengguang
2011-04-26 9:43 ` [PATCH 2/3] readahead: reduce unnecessary mmap_miss increases Wu Fengguang
2011-04-26 9:43 ` Wu Fengguang
2011-04-26 9:43 ` [PATCH 3/3] readahead: trigger mmap sequential readahead on PG_readahead Wu Fengguang
2011-04-26 9:43 ` Wu Fengguang
2011-04-26 14:36 ` [PATCH 3/3 with new changelog] " Wu Fengguang
-- strict thread matches above, loose matches on Subject: below --
2011-04-26 9:43 [PATCH 0/3] reduce readahead overheads on tmpfs mmap page faults Wu Fengguang
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