Re: dm-crypt parallelization patches

From: Vivek Goyal
Date: Tue Apr 09 2013 - 15:14:14 EST

On Tue, Apr 09, 2013 at 11:57:21AM -0700, Tejun Heo wrote:

> And destroy all per-ioc and cgroup logics in block layer in the
> process.

Oh, I am in no-way suggesting don't use bio_associate_current(). I am
just trying to analyze the performance issue right now and saying that
as far as performance is concenred, one will get it back even if one
does not use bio_associate_current().

Yes but one needs to use bio_associate_current() to make sure bio's
are attributed to right cgroup and associate bio to right task. This
should help solving the long standing issue of task losing its ioprio
if dm-crypt target is in the stack.

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