From mboxrd@z Thu Jan 1 00:00:00 1970 From: Josef Bacik Subject: Re: [btrfs-transacti] & btrfs-endio-wri] - WAS: Re: [btrfs-delalloc-] Date: Thu, 30 Jun 2011 13:13:02 -0400 Message-ID: <4E0CAE9E.7000406@redhat.com> References: <4E084786.2070200@corp.mail.ru> <201106271521.54497.hka@qbs.com.pl> <4E0B46CA.2030205@corp.mail.ru> <4E0B4F67.30702@redhat.com> <4E0C8443.7070109@corp.mail.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Cc: Proskurin Kirill To: Btrfs mailing list Return-path: In-Reply-To: <4E0C8443.7070109@corp.mail.ru> List-ID: On 06/30/2011 10:12 AM, Proskurin Kirill wrote: > On 06/29/2011 08:14 PM, Josef Bacik wrote: >>> Ok - I upgrade to 2.6.39-2 but it is seems to all things get worse. >>> Now I see [btrfs-transacti]& btrfs-endio-wri] 80-100% all the time and >>> io performance looks like lower then before. >>> >>> Our scribe daemon in state D most of the time with half of a normal >>> load. Only kernel was changed. >>> >>> Any performance tune recommendation? >>> >> >> Can you get sysrq+w while this problem is happening so we can see whats >> going on? Thanks, > > I attached sysrq+w. Hope it helps. > Heh so it just looks like you are writing a bunch of stuff, that's not particularly helpful. What does this program do generically? How full is your fs? Do you have snapshots/subvolumes? If so how many? Thanks, Josef