From mboxrd@z Thu Jan 1 00:00:00 1970 From: Edward Shishkin Subject: Re: Question about reiser performance - short system freezes Date: Thu, 24 Feb 2011 19:29:24 +0100 Message-ID: <4D66A384.9000005@gmail.com> References: <4D65A3F7.22052.1288FE@jafojtik.seznam.cz>, <4D664A0E.8020900@gmail.com> <4D65CEAF.31101.5A677E@jafojtik.seznam.cz> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4D65CEAF.31101.5A677E@jafojtik.seznam.cz> Sender: reiserfs-devel-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: Jaroslav Fojtik Cc: reiserfs-devel@vger.kernel.org On 02/24/2011 04:21 AM, Jaroslav Fojtik wrote: > Dear Edward Shishkin, > >>> May be that my comment might be userfull for your reiser development: >>> >>> I am facing following performance issue. The reiser works without data loss, >>> but system sometimes hangs for 15s, mouse cursor is frozen and after this >>> period it continues to work without any problem. It is strange, because I have 6 cores >>> and all of them seems to be locked and waiting for something. >>> >>> Hanging occurs during intensive file search like find, or first phase >>> of rsync. >>> >>> It seems to me that both reiser3 and reiser4 suffer by this issue. >>> I have found BKL inside reiser3, but reiser4 seems to be without BKL. >>> >>> It is also strange that OS resides on different partition that should not >>> be affected by reiser locking. >>> >>> May be that it could be problem large say 600GB HDD partition. But these partitins >>> are normal nowadays. >>> >>> Is there any idea how to overcome this issue? >>> >> >> Which kernel version? > > I have tested these kernels: 2.6.32.11 and 2.6.34. Hello Jaroslav. It might be a regression that have been fixed in the latest kernels. Consider upgrading to .37. If it doesn't disappear, then please send the SysRq-w output. Thanks, Edward.