On Tue, 19 Apr 2011 05:08:05 -0700 Chris Mason wrote:
Excerpts from Cheng Shao's message of 2011-04-18 17:49:29 -0400:
Hi there,
I'm periodically having issues with btrfs running in a Ubuntu VM using
VirtualBox. After the VM has been running for a while (a couple days),
any write operation seems getting stuck. The read seems totally fine.
I tried a simple dd of a 4M file and it got stuck after writing 131K
worth of data.
I don't know if this is btrfs related, or it is due to some bug in
VritualBox. Could you guys provide information on how to debug this
(collecting logs, getting dumps etc.)? Thanks a lot!
Which kernel are you running?
Not reproducible with Linux 2.6.38.2-9.fc15.x86_64, Fedora 15 beta2, VirtualBox
4.06 on a Mac OS X host.
Unrelated to btrfs but related to VirtualBox write hang, I did experience
numerous hangs during installation of F15, which were apparently* resolved with
kernel parameter clocksource=jiffies which is not related to btrfs, and was not
previously required for F14 with earlier versions of VirtualBox.
Chris Murphy
* I say apparently with a sample of 8 failures without the option and 1 success
with the option.--
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