>> Additionally, ps and killall also hang in D state reading from proc.
>
> This is a side-effect of extra locking introduced into procfs to
> safeguard certain operations against memory corruption.
Doesn't that strike you as a Very Bad Thing? The tools we might use
to look for a problem lock up because of the problem.
Could there be a short timeout added? (such as HZ/100 jiffies)
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