lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date:   Mon, 15 Apr 2019 21:09:49 +0000
Subject: [Bug 203247] jbd2 gets stuck at jbd2_journal_commit_transaction

Theodore Tso ( changed:

           What    |Removed                     |Added
             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #11 from Theodore Tso ( ---
Looking at your iostat -x output, /dev/sda is completely utilized:

Device:         rrqm/s   wrqm/s     r/s     w/s    rkB/s    wkB/s 
sda               0.00  1154.00   47.00  836.00   864.00 10076.00    

avgrq-sz avgqu-sz   await r_await w_await  svctm  %util
24.78    136.46     116.05  331.72  103.93   1.13 100.00

Note the 100% utilization and the average queue size of 136.46 I/O requests.  
So as I said, this sounds like I/O overload.   Your workload is simply issuing
more I/O than the disk can handle.   Why is going to be a userspace issue.

If you don't care about stale data (e.g., belonging to deleted files, which may
have privacy issues if you care about GDPR, HIPPA, PCI, etc. mandates) you
could try mounting with the mount option "data=writeback".  It could be that
updating to a newer version of the kernel (4.9.86 is quite antique, and you're
probably missing all sorts of security and otehr bug fixes) and a newer
userspace, and then setting up a new set of file systems formatted with ext4
will also help performance.   Or there might be something going on with
userspace writes to /dev/sda that shouldn't be happening or which could be
optimized away.

But I don't see anything here which is a kernel bug.

You are receiving this mail because:
You are watching the assignee of the bug.

Powered by blists - more mailing lists