Re: [PATCH -next] locking/rwsem: don't spin in heavy contention

[Ming Lei]

On Sat, Mar 7, 2015 at 5:54 AM, Dave Chinner <david@xxxxxxxxxxxxx> wrote:
>
> If you're getting stuff there, I'd be looking for a bug in ext4, not
> the rwsem code. There's no way there should be enough unwritten
> extent conversion pending to lock up the system for that length of
> time. Especially considering the test has concurrent truncates

The time is taken for spinning rwsem, so it is really a rwsem problem,
and Jason Low has posted one patch to fix it.

Thanks,
Ming Lei
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