Hi Dave,
I suspected after initial testing a problem in TTY and applied two patches.
After more testing the root cause was a problem in JBD2.
A patch from Eric helped!
Follow the thread in [1] for more details.
If you are on Linux-Next (next-20130118) you need the following three patches.
Ilya Zykov (2):
tty: Correct tty buffer flush.
tty: Add driver unthrottle in ioctl(...,TCFLSH,..).
Eric Sandeen (1):
jbd2: don't wake kjournald unnecessarily
Hope this helps you.
Regards,
- Sedat -
[0] http://marc.info/?t=135862023700004&r=1&w=2
[1] http://marc.info/?l=linux-serial&m=135860500714909&w=2
[2] http://git.kernel.org/?p=linux/kernel/git/gregkh/tty.git;a=commitdiff;h=a1bf9584429d61b7096f93ae09325e1ba538e9e8
[3] http://patchwork.ozlabs.org/patch/207237/
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