From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org (ozlabs.org [IPv6:2401:3900:2:1::2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id D32CC1A0118 for ; Mon, 7 Mar 2016 14:00:27 +1100 (AEDT) Message-ID: <1457319627.19197.1.camel@ellerman.id.au> Subject: Re: Problems with swapping in v4.5-rc on POWER From: Michael Ellerman To: Hugh Dickins Cc: "Aneesh Kumar K.V" , Paul Mackerras , linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org Date: Mon, 07 Mar 2016 14:00:27 +1100 In-Reply-To: References: <877fhttmr1.fsf@linux.vnet.ibm.com> <1456984266.28236.1.camel@ellerman.id.au> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Fri, 2016-03-04 at 09:58 -0800, Hugh Dickins wrote: > > The alternative bisection was as unsatisfactory as the first: > again it fingered an irrelevant merge (rather than any commit > pulled in by that merge) as the bad commit. > > It seems this issue is too intermittent for bisection to be useful, > on my load anyway. Darn. Thanks for trying. > The best I can do now is try v4.4 for a couple of days, to verify that > still comes out good (rather than the machine going bad coincident with > v4.5-rc), then try v4.5-rc7 to verify that that still comes out bad. Thanks, that would still be helpful. > I'll report back on those; but beyond that, I'll have to leave it to you. I haven't had any luck here :/ Can you give us a more verbose description of your test setup? - G5, which exact model? - 4k pages, no THP. - how much ram & swap? - building linus' tree, make -j ? - source and output on tmpfs? (how big?) - what device is the swap device? (you said SSD I think?) - anything else I've forgotten? Oh and can you send us your bisect logs, we can at least trust the bad results I think. cheers