From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-x233.google.com (mail-pf0-x233.google.com [IPv6:2607:f8b0:400e:c00::233]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 831971A0406 for ; Thu, 25 Feb 2016 16:36:24 +1100 (AEDT) Received: by mail-pf0-x233.google.com with SMTP id x65so26495595pfb.1 for ; Wed, 24 Feb 2016 21:36:24 -0800 (PST) Date: Wed, 24 Feb 2016 21:36:13 -0800 (PST) From: Hugh Dickins To: Michael Ellerman cc: Hugh Dickins , "Aneesh Kumar K.V" , linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org Subject: Re: Problems with swapping in v4.5-rc on POWER In-Reply-To: <1456373550.30375.3.camel@ellerman.id.au> Message-ID: References: <1456373550.30375.3.camel@ellerman.id.au> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Thu, 25 Feb 2016, Michael Ellerman wrote: > > I do run tests on G5, but obviously not rigorously enough. I kicked off a few > kernel builds on mine and it survived, though once it hits swap it's almost > unusably slow. I'll leave it running overnight and see if I hit anything. Oh yes, I'd forgotten how unusably slow: I tend to forget that I slipped an SSD in there some while back, just for the swapping: slow, but not unusable. Thanks, I'm hoping you will be able to reproduce it yourself. Hugh