Excerpts from Mitch Harder's message of 2011-02-24 10:55:15 -0500: > 2011/2/24 Maria Wikström <ma...@ponstudios.se>: > > 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. > > > > I believe I've been experiencing this issue also. However, my problem > usually results in a "No space left on device" error rather than a > lock-up or crash. But I've bisected my issue to this patch, and my > "btrfs fi show" and "btrfs fi df" looks similar to others who've > posted to this tread with all my space being allocated, but not used. >
Sorry, which patch did you bisect the problem down to? > I've been playing around with ftrace to try to get some information on > the issue. Since I'm getting a soft error, I can used a command like > "echo 1 > tracing_on; emerge -1av openmotif; echo 0 > tracing_on" to > end the trace as soon as the build fails. > > The traces are probably too large for the M/L (~275kb compressed), so > I've put them up on my local server in case anybody can find them > useful: > > http://dontpanic.dyndns.org/emerge-openmotif-ftrace.gz > > I'm still only capturing the tail end of the problem, but maybe > someone will find these insightful. > > Let me know if you want me to increase the ftrace buffer size or > insert some trace_printk debugging statements. Thanks, I'll take a look. -chris -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
