From: Igor Podlesny <for.poige+linux@gmail.com>
To: NeilBrown <neilb@suse.de>
Cc: linux-raid@vger.kernel.org
Subject: Re: HugePages for MD's caches -- can this be done in modern kernel?
Date: Sat, 7 Feb 2009 02:27:43 +0700 [thread overview]
Message-ID: <43d009740902061127p1a8073ax231877c8ed3eeda9@mail.gmail.com> (raw)
In-Reply-To: <c39d1fabb5aef8e2ed5158ad59802cf1.squirrel@neil.brown.name>
2009/2/7 NeilBrown <neilb@suse.de>:
> On Sat, February 7, 2009 5:08 am, Igor Podlesny wrote:
>> Hi!
>>
>> $(Subj). :-)
>>
>> P. S. Also, I deem there lots of structures in kernel that could
>> benefit
>> from using HugePages. But this probably a q-n for another kernel list.
>
> I have only a vague idea what HugePages are and it is not at all clear to
> me why you would want to use them for the MD cache. I assume you are
>
HugePages requires less TBL entries so they better fit for large
buffers, as far as I understand.
http://unixfoo.blogspot.com/2007/10/hugepages.html
http://linux-mm.org/HugePagesArticles
> talking about MD/RAID456 as that is the only place we use a cache.
>
Yeah, "stripe_cache_size" setting.
>
> Maybe if you could explain what you are thinking....
>
Yeah, hope this would suffice.
--
End of message. Next message?
next prev parent reply other threads:[~2009-02-06 19:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <43d009740902061008p968268bj30a03c6f97139bbe@mail.gmail.com>
2009-02-06 18:11 ` HugePages for MD's caches -- can this be done in modern kernel? Igor Podlesny
[not found] ` <c39d1fabb5aef8e2ed5158ad59802cf1.squirrel@neil.brown.name>
2009-02-06 19:27 ` Igor Podlesny [this message]
2009-02-06 20:16 ` NeilBrown
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