From: "Martin K. Petersen" <mkp@wildopensource.com>
To: Matthew Wilcox <matthew@wil.cx>
Cc: Andi Kleen <ak@suse.de>,
linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org,
akpm@osdl.org, tony.luck@intel.com
Subject: Re: [PATCH] General purpose zeroed page slab
Date: Mon, 18 Oct 2004 18:54:13 +0000 [thread overview]
Message-ID: <yq1acujrh62.fsf@wilson.mkp.net> (raw)
In-Reply-To: <20041018184210.GI16153@parcelfarce.linux.theplanet.co.uk> (Matthew Wilcox's message of "Mon, 18 Oct 2004 19:42:10 +0100")
>>>>> "Matthew" = Matthew Wilcox <matthew@wil.cx> writes:
Matthew> It's probably worth doing this with a static cachep in slab.c
Matthew> and only exposing a get_zeroed_page() / free_zeroed_page()
Matthew> interface, with the latter doing the memset to 0.
*nod*
Matthew> I disagree with Andi over the dumbness of zeroing the whole
Matthew> page. That makes it cache-hot, which is what you want from a
Matthew> page you allocate from slab.
Yeah, plus the housekeeping may be more of a hassle than it's worth.
We'll see...
--
Martin K. Petersen Wild Open Source, Inc.
mkp@wildopensource.com http://www.wildopensource.com/
WARNING: multiple messages have this Message-ID (diff)
From: "Martin K. Petersen" <mkp@wildopensource.com>
To: Matthew Wilcox <matthew@wil.cx>
Cc: Andi Kleen <ak@suse.de>,
linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org,
akpm@osdl.org, tony.luck@intel.com
Subject: Re: [PATCH] General purpose zeroed page slab
Date: Mon, 18 Oct 2004 14:54:13 -0400 [thread overview]
Message-ID: <yq1acujrh62.fsf@wilson.mkp.net> (raw)
In-Reply-To: <20041018184210.GI16153@parcelfarce.linux.theplanet.co.uk> (Matthew Wilcox's message of "Mon, 18 Oct 2004 19:42:10 +0100")
>>>>> "Matthew" == Matthew Wilcox <matthew@wil.cx> writes:
Matthew> It's probably worth doing this with a static cachep in slab.c
Matthew> and only exposing a get_zeroed_page() / free_zeroed_page()
Matthew> interface, with the latter doing the memset to 0.
*nod*
Matthew> I disagree with Andi over the dumbness of zeroing the whole
Matthew> page. That makes it cache-hot, which is what you want from a
Matthew> page you allocate from slab.
Yeah, plus the housekeeping may be more of a hassle than it's worth.
We'll see...
--
Martin K. Petersen Wild Open Source, Inc.
mkp@wildopensource.com http://www.wildopensource.com/
next prev parent reply other threads:[~2004-10-18 18:54 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-14 16:50 [PATCH] General purpose zeroed page slab Martin K. Petersen
2004-10-14 16:50 ` Martin K. Petersen
2004-10-14 17:30 ` Brian Gerst
2004-10-14 17:30 ` Brian Gerst
2004-10-14 17:36 ` Matthew Wilcox
2004-10-14 17:36 ` Matthew Wilcox
2004-10-14 18:49 ` Dave Jones
2004-10-14 18:49 ` Dave Jones
2004-10-14 19:08 ` Denis Vlasenko
2004-10-14 19:08 ` Denis Vlasenko
2004-10-14 19:47 ` Matthew Wilcox
2004-10-14 19:47 ` Matthew Wilcox
2004-10-14 18:04 ` Andi Kleen
2004-10-14 18:04 ` Andi Kleen
2004-10-14 23:36 ` Adam Heath
2004-10-14 23:36 ` Adam Heath
2004-10-15 1:18 ` Andi Kleen
2004-10-15 1:18 ` Andi Kleen
2004-10-18 18:06 ` Martin K. Petersen
2004-10-18 18:06 ` Martin K. Petersen
2004-10-18 18:42 ` Matthew Wilcox
2004-10-18 18:42 ` Matthew Wilcox
2004-10-18 18:54 ` Martin K. Petersen [this message]
2004-10-18 18:54 ` Martin K. Petersen
2004-10-18 19:06 ` Andi Kleen
2004-10-18 19:06 ` Andi Kleen
2004-10-18 21:06 ` Andi Kleen
2004-10-18 21:06 ` Andi Kleen
2004-10-18 19:03 ` Luck, Tony
2004-10-18 19:03 ` Luck, Tony
2004-10-18 19:14 ` Matthew Wilcox
2004-10-18 19:14 ` Matthew Wilcox
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