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From: Chris Wright <chrisw@osdl.org>
To: Matthew Dobson <colpatch@us.ibm.com>
Cc: linux-kernel@vger.kernel.org,
	Linux Memory Management <linux-mm@kvack.org>
Subject: Re: [RFC][PATCH 0/8] Critical Page Pool
Date: Fri, 18 Nov 2005 11:56:57 -0800	[thread overview]
Message-ID: <20051118195657.GI7991@shell0.pdx.osdl.net> (raw)
In-Reply-To: <437E2C69.4000708@us.ibm.com>

* Matthew Dobson (colpatch@us.ibm.com) wrote:
> /proc/sys/vm/critical_pages: write the number of pages you want to reserve
> for the critical pool into this file

How do you size this pool?  Allocations are interrupt driven, so how to you
ensure you're allocating for the cluster network traffic you care about?

> /proc/sys/vm/in_emergency: write a non-zero value to tell the kernel that
> the system is in an emergency state and authorize the kernel to dip into
> the critical pool to satisfy critical allocations.

Seems odd to me.  Why make this another knob?  How did you run to set this
flag if you're in emergency and kswapd is going nuts?

thanks,
-chris

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  parent reply	other threads:[~2005-11-18 19:56 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-11-18 19:32 Matthew Dobson
2005-11-18 19:36 ` [RFC][PATCH 1/8] Create " Matthew Dobson
2005-11-19  0:08   ` Paul Jackson
2005-11-21  5:50     ` Matthew Dobson
2005-11-21  5:54       ` Paul Jackson
2005-11-18 19:36 ` [RFC][PATCH 2/8] Create emergency trigger Matthew Dobson
2005-11-19  0:21   ` Paul Jackson
2005-11-21  5:51     ` Matthew Dobson
2005-11-18 19:40 ` [RFC][PATCH 3/8] Slab cleanup Matthew Dobson
2005-11-18 19:41 ` [RFC][PATCH 4/8] Fix a bug in scsi_get_command Matthew Dobson
2005-11-18 19:43 ` [RFC][PATCH 5/8] get_object/return_object Matthew Dobson
2005-11-18 19:44 ` [RFC][PATCH 6/8] slab_destruct Matthew Dobson
2005-11-18 19:44 ` [RFC][PATCH 0/8] Critical Page Pool Avi Kivity
2005-11-18 19:51   ` Matthew Dobson
2005-11-18 20:42     ` Avi Kivity
2005-11-19  0:10       ` Paul Jackson
2005-11-21  5:36       ` Matthew Dobson
2005-11-18 19:45 ` [RFC][PATCH 7/8] __cache_grow() Matthew Dobson
2005-11-18 19:47 ` [RFC][PATCH 8/8] Add support critical pool support to the slab allocator Matthew Dobson
2005-11-18 19:56 ` Chris Wright [this message]
2005-11-21  5:47   ` [RFC][PATCH 0/8] Critical Page Pool Matthew Dobson
2005-11-21 13:29     ` Pavel Machek
2005-12-06 22:54       ` Matthew Dobson
2005-12-10  8:39         ` Pavel Machek
2005-11-20  7:45 ` Keith Owens
2005-11-21  5:53   ` Matthew Dobson
2005-11-20 23:04 ` Pavel Machek
2005-11-21  5:58   ` Matthew Dobson

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