From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Mason Subject: Re: Hang running fs_mark Date: Thu, 25 Sep 2008 17:04:42 -0400 Message-ID: <1222376682.7028.80.camel@think.oraclecorp.com> References: <20080925175643.GA14205@unused.rdu.redhat.com> <1222367822.7028.55.camel@think.oraclecorp.com> <20080925183435.GB14205@unused.rdu.redhat.com> <1222369531.7028.58.camel@think.oraclecorp.com> <48DBF693.20501@redhat.com> Mime-Version: 1.0 Content-Type: text/plain Cc: Josef Bacik , linux-btrfs@vger.kernel.org To: Ric Wheeler Return-path: In-Reply-To: <48DBF693.20501@redhat.com> List-ID: On Thu, 2008-09-25 at 16:37 -0400, Ric Wheeler wrote: > Chris Mason wrote: > > On Thu, 2008-09-25 at 14:34 -0400, Josef Bacik wrote: > > > >> On Thu, Sep 25, 2008 at 02:37:02PM -0400, Chris Mason wrote: > >> > >>> On Thu, 2008-09-25 at 13:56 -0400, Josef Bacik wrote: > >>> > >>>> Hello, > >>>> > >>>> Reporting this on behalf of ric. He was running the following fs_mark command > >>>> > >>>> ./fs_mark -d /mnt/test -s 20480 -D 64 -t 8 -F > >>>> > >>>> Seems it hung and wasn't making any progress. He managed to get some sysrq-t, > >>>> which is at http://people.redhat.com/jwhiter/fs-mark-hang.txt towards the bottom > >>>> of the document. He could ctrl+c and unmount the fs so its not a hard hang. > >>>> Looks like we've just locked up behind a page lock somewhere. I have to run off > >>>> to class so I can't look into it too deeply so throwing this out there hoping > >>>> somebody else figures it out :). Thanks, > >>>> > >>> Which kernel was this? > It actually cleaned up very nicely after I killed the fs_mark processes > & unmounted the btrfs file system. Before doing that, the box was > sluggish and had the feeling of a system with something that might have > been spinning (but that is just an observation, not measured in any > strict sense). Ok, I have that fs_mark test running here. How far did yours get before it stopped? -chris