Re: tty breakage in X (Was: tty vs workqueue oddities)

[Andreas Schwab]

Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> writes:

> It looks like the patch is causing some major malfunctions of the X
> server for me, possibly related to PTYs. For example, cat'ing a large
> file in a gnome terminal hangs the kernel for -minutes- in a loop of
> what looks like flush_to_ldisc/workqueue code, (some ftrace data in the
> quoted bits further down). 

Btw., do you already have d72bce0 ("rcu: Cure load woes")?  Although
that is about an independent bug, it appears to amplify this issue a
lot.

Andreas.

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Andreas Schwab, schwab@xxxxxxxxxxxxxx
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