From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tharindu Rukshan Bamunuarachchi Subject: Re: NUMA page allocation from next Node Date: Tue, 2 Nov 2010 06:19:14 +0530 Message-ID: References: <20101027213652.GA12345@sgi.com> <20101029195235.GA3769@tpepper-t61p.dolavim.us> <1288623553.3229.24.camel@useless.localdomain> <20101101180059.GJ25817@basil.fritz.box> Mime-Version: 1.0 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:mime-version:received:in-reply-to :references:from:date:message-id:subject:to:cc:content-type :content-transfer-encoding; bh=48pkYML3o4EFNs+W240mB3LYZ5rA+UyLyMoPOLWQfnA=; b=reqwri7vwz1D+qTJKjTNg835Wg7Shth36X+vjmN3H6rG7xHDVewjkVIUHgQXZbwi67 JLjY5CPUpoZFefX+tV9g/Jb7lamTNFbWCARJif9LL7uXkd6bybVJit2uhQr0nQ+v54wd 00iRTVJMaeS9NO3Rk0W2mZkPN2zqSMREJOCYs= In-Reply-To: <20101101180059.GJ25817@basil.fritz.box> Sender: linux-numa-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="utf-8" To: Andi Kleen Cc: Lee Schermerhorn , Tim Pepper , linux-numa@vger.kernel.org Andi/Lee/Tim/Scott/Cliff/Jiahua, Thankx a lot for your valuable inputs/advices. __ Tharindu R Bamunuarachchi. On Mon, Nov 1, 2010 at 11:30 PM, Andi Kleen wrote= : >> Because the SLIT on the IBM platform has distances > 20. =C2=A0Looks= like IBM >> is populating the SLIT on those platforms with "real" values. =C2=A0= The HP >> bios is not supplying a slit, letting the remote distances default t= o >> 20. =C2=A0That is the threshold for setting zone_reclaim_mode. =C2=A0= A patch was >> submitted recently to bump the threshold to ~30. =C2=A0Now that vend= ors are >> starting to populate the SLIT with values > 20, we've begun to see t= he >> behavior that you experienced. > > I think it's intentional by the vendors: they use it a way to make > Linux behave like they want. > > -Andi >