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From: Wu Fengguang <fengguang.wu@intel.com>
To: Andrew Morton <akpm@linux-foundation.org>
To: Andi Kleen <andi@firstfloor.org>
Cc: Tim Chen <tim.c.chen@intel.com>
Cc: Li Shaohua <shaohua.li@intel.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>,
	LKML <linux-kernel@vger.kernel.org>
Cc: 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


WARNING: multiple messages have this Message-ID (diff)
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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             reply	other threads:[~2011-04-26  9:51 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-04-26  9:43 Wu Fengguang [this message]
2011-04-26  9:43 ` [PATCH 0/3] reduce readahead overheads on tmpfs mmap page faults Wu Fengguang
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 ` 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 ` 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
2011-04-26 14:36     ` Wu Fengguang
2011-04-26  9:43 ` [PATCH 3/3] " 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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