mån 2011-02-21 klockan 09:51 +0800 skrev Zhong, Xin: > The backtrace in your attachment looks like a known bug of 2.6.37 which have > already been fixed in 2.6.38. I have no idea why latest btrfs still hang in > your environment if there's no debug info... >
Haha, yes that's very hard :) 2.6.38-rc6 and btrfs-unstable behaves the same way. I can close the process with ctrl+c and it disappear a few seconds later. There is no CPU usage. Reading works because I can start htop and watch "svn info" disappear, but everything writing to btrfs slows down to a crawl. It takes about 1 minute to log in. So I had to put the logs on an other partition using ext3 to get the output from sysrq+t. // Maria > -----Original Message----- > From: Maria Wikström [mailto:ma...@ponstudios.se] > Sent: Friday, February 18, 2011 7:32 PM > To: Zhong, Xin > Cc: Johannes Hirte; linux-btrfs@vger.kernel.org > Subject: RE: [PATCH v2]Btrfs: pwrite blocked when writing from the mmaped > buffer of the same page > > > Seems like my reply got eaten by the lists spam filter, so I resend with > attachment compressed. Should have thought of that :p > > > fre 2011-02-11 klockan 12:39 +0800 skrev Zhong, Xin: > > Hi, > > > > Could you paste the output of sysrq+t here? Thanks! > > Yes, it's in the attachment. I tried latest btrfs from git (last commit Mon > Feb 14 00:45:29 2011 +0000) but it hang so bad that I couldn't get the output > from sysrq+t to hit the disk. So the output is from vanilla > 2.6.37 > > // Maria > > > -----Original Message----- > > From: Johannes Hirte [mailto:johannes.hi...@fem.tu-ilmenau.de] > > Sent: Wednesday, February 02, 2011 7:35 AM > > To: Zhong, Xin > > Cc: Maria Wikström; linux-btrfs@vger.kernel.org > > Subject: Re: [PATCH v2]Btrfs: pwrite blocked when writing from the > > mmaped buffer of the same page > > > > On Friday 28 January 2011 04:53:24 Zhong, Xin wrote: > > > Could you describe the steps to recreate it? > > > It will be a great help for me to look further. Thanks! > > > > It's a little strange. I have to systems with btrfs, both > > Gentoo-based. One is affected by this bug the other is not. On the > > affected system it is enough to do a 'emerge dev-libs/libgcrypt' that > > should normaly compile and install libgcrypt. The emerge command is > > part of portage, the package management of Gentoo. > > The strace output looks similar to the one from Maria: > > >
2.6.38-rc6_sysrq-t.txt.tar.bz2
Description: application/bzip-compressed-tar
btrfs-unstable_sysrq-t.txt.tar.bz2
Description: application/bzip-compressed-tar
