From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f69.google.com (mail-pg0-f69.google.com [74.125.83.69]) by kanga.kvack.org (Postfix) with ESMTP id 69EB56B02BD for ; Sun, 4 Feb 2018 20:42:28 -0500 (EST) Received: by mail-pg0-f69.google.com with SMTP id y62so18669752pgy.0 for ; Sun, 04 Feb 2018 17:42:28 -0800 (PST) Received: from mga14.intel.com (mga14.intel.com. [192.55.52.115]) by mx.google.com with ESMTPS id 71si6091797pfx.376.2018.02.04.17.42.27 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 04 Feb 2018 17:42:27 -0800 (PST) From: "Huang\, Ying" Subject: Re: bisected bd4c82c22c367e is the first bad commit (was [Bug 198617] New: zswap causing random applications to crash) References: <20180130114841.aa2d3bd99526c03c6a5b5810@linux-foundation.org> <20180203013455.GA739@jagdpanzerIV> <20180205013758.GA648@jagdpanzerIV> Date: Mon, 05 Feb 2018 09:42:23 +0800 In-Reply-To: <20180205013758.GA648@jagdpanzerIV> (Sergey Senozhatsky's message of "Mon, 5 Feb 2018 10:37:58 +0900") Message-ID: <87shag43gg.fsf@yhuang-dev.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ascii Sender: owner-linux-mm@kvack.org List-ID: To: Sergey Senozhatsky Cc: huang ying , Andrew Morton , Michal Hocko , Vlastimil Babka , Sergey Senozhatsky , Minchan Kim , Seth Jennings , Dan Streetman , "Kirill A . Shutemov" , linux-mm@kvack.org, LKML Sergey Senozhatsky writes: > Hi, > > On (02/04/18 22:21), huang ying wrote: > [..] >> >> After disabling zswap no crashes at all. >> >> >> >> /etc/systemd/swap.conf >> >> zswap_enabled=1 >> >> zswap_compressor=lz4 # lzo lz4 >> >> zswap_max_pool_percent=25 # 1-99 >> >> zswap_zpool=zbud # zbud z3fold >> > > [..] >> Can you give me some detailed steps to reproduce this? Like the >> kernel configuration file, swap configuration, etc. Any kernel >> WARNING during testing? Can you reproduce this with a real swap >> device instead of zswap? > > No warnings (at least no warnings with my .config). Tested it only with > zram based swap (I'm running swap-less x86 systems, so zram is the easiest > way). It seems it's THP + frontswap that makes things unstable, rather > than THP + swap. > > Kernel zswap boot params: > zswap.enabled=1 zswap.compressor=lz4 zswap.max_pool_percent=10 zswap.zpool=zbud > > Then I add a 4G zram swap and run a silly memory hogger. I don't think > you'll have any problems reproducing it, but just in case I attached my > .config Thanks for your information! I will try to reproduce it today! Best Regards, Huang, Ying > -ss -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org