Hi Kent and list,
I may have stumbled upon a deadlock in the latest code for bcache. Since
I see this is a hot issue between you and the guys working on dm, you
might want to take a look.
I have compiled your latest commit in master branch
(66f5a1f7311d5cc24bdff876ca2cfed88a3cc5d1) and running it raw on my home
laptop - not using a VM or something.
For benchmarking reasons, I'm using a RAMdisk (brd module) as a cache
set for an HDD disk. These are the steps that I take:
# Load ramdisks with max size 2.5GB (/dev/ram[0-15])
modprobe brd rd_size=2621440
#Format ramdisk as bcache cache set
make-bcache -C /dev/ram0
#Register the cache set
echo /dev/ram0 > /sys/fs/bcache/register
The last command fails to finish. The system hangs and nothing gets to
be written in kern.log.
On the other hand, on another bcache kernel that is installed in the
same system, everything runs smoothly. This kernel was taken from the
bcache-dev branch and based on linux kernel version 3.5.0 rc2.
It is probably not a big issue, but i thought it'd be helpful to share it.
So, is the proposed code somewhere in your git tree? In this case, I
could try it out and check if this problem is solved.
Thanks,
Alex
--
To unsubscribe from this list: send the line "unsubscribe linux-bcache" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
