Argh. That hang took a lot longer to show up than last time, didn't it? Wonder if I might have fixed part of the problem. On Tue, Apr 30, 2013 at 9:13 AM, Juha Aatrokoski <jha@xxxxxxxxxxx> wrote: > On Fri, 26 Apr 2013, Juha Aatrokoski wrote: >> >> On Sun, 21 Apr 2013, Juha Aatrokoski wrote: >>> >>> On Sat, 20 Apr 2013, Kent Overstreet wrote: >>>> >>>> On Thu, Apr 18, 2013 at 02:42:59PM +0300, Juha Aatrokoski wrote: >>>>> >>>>> I ran into the same bug as Heiko Wundram reported a while back: >>>>> after a few (2-4) days of normal desktop usage, bcache hangs and >>>>> dstat shows continuous 50MB/s write to the cache SSD partition with >>>>> one CPU core maxed out in IO wait. I remembered Kent's answer to the >>>>> later message, and at least echoing 0 to writeback_running did >>>>> nothing in my system. The bcache device consists of an SSD partition >>>>> and two disks in md raid0, and there is dmcrypt on top of bcache. >>>>> >>>>> The branch was bcache patched to a 3.7.10 (Gentoo) kernel. Is bcache >>>>> the correct branch, or should I be using bcache-for-upstream? (There >>>>> are many branches in the git repo, but I can't find any >>>>> documentation/description on what they are and who should use them.) >>>>> >>>>> I had to revert back to the previous setup, which was bcache-3.2 >>>>> patched to a 3.6.11 kernel and which doesn't have the problem. But >>>>> it looks like bcache-3.2 cannot be trivially (i.e. without more >>>>> detailed knowledge about bcache and the bio subsystem) ported to 3.7 >>>>> kernels, so I guess I'll be stuck with 3.6 until the bug is fixed. >>>> >>>> >>>> So, I'm not having any luck with reproducing it, but I do have a >>>> possible fix in the bcache-testing branch - any chance you can give that >>>> a try and let me know if it works? >>> >>> >>> OK, I'll test it when I have time, which may not be until next weekend. >> >> >> I just patched my 3.7.10 Gentoo kernel with the latest bcache branch >> (which I understand should have the fix for this) and rebooted. I'll let you >> know if the problem still persists. > > > No luck, same symptoms after four days running the latest bcache branch. > -- 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
