Re: [PATCH v2]Btrfs: pwrite blocked when writing from the mmaped buffer of the same page
From: Johannes Hirte <hidden>
Date: 2011-02-22 22:27:03
On Friday 11 February 2011 05:39:39 Zhong, Xin wrote:
Hi, Could you paste the output of sysrq+t here? Thanks!
Sorry for the long delay. I've attached the dmesg output of sysrq-t from 2.6.38-rc3 and rc4 as the behavior differs between both versions. With rc3 it don't need any interaction. I start 'emerge sys-devel/libgcrypt', the tasks hangs and top shows a svn process eating 100% CPU. With rc4 the system hangs too but the CPU load stays low. When I try to cancel the emerge process (ctrl c) the CPU load goes up and top shows the svn process together with a flush- btrfs task, eating the CPU.
Attachments
- sysrq-t-38-rc.tar.bz2 [application/x-bzip-compressed-tar] 45354 bytes