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| author | Thorsten Knabe <linux@thorsten-knabe.de> | 2014-08-23 15:47:38 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-14 08:59:49 -0800 |
| commit | c8f712403473828d7a72882025114ef42491b1ae (patch) | |
| tree | 6753651ab7f5539c76f2e25777b71babdad2aa50 /lib/prio_heap.c | |
| parent | 119947ac0a0929f3602d6015c49116ea67cbc617 (diff) | |
um: ubd: Fix for processes stuck in D state forever
commit 2a2361228c5e6d8c1733f00653481de918598e50 upstream.
Starting with Linux 3.12 processes get stuck in D state forever in
UserModeLinux under sync heavy workloads. This bug was introduced by
commit 805f11a0d5 (um: ubd: Add REQ_FLUSH suppport).
Fix bug by adding a check if FLUSH request was successfully submitted to
the I/O thread and keeping the FLUSH request on the request queue on
submission failures.
Fixes: 805f11a0d5 (um: ubd: Add REQ_FLUSH suppport)
Signed-off-by: Thorsten Knabe <linux@thorsten-knabe.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib/prio_heap.c')
0 files changed, 0 insertions, 0 deletions