Re: caching the request queue was Re: interims VFS queue

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On Sat, Oct 29, 2011 at 01:49:16PM +0200, Andi Kleen wrote:
> On Sat, Oct 29, 2011 at 06:58:56AM -0400, Christoph Hellwig wrote:
> > On Fri, Oct 28, 2011 at 03:09:36PM -0700, Andrew Morton wrote:
> > > 1: What happened with Andi's "dio: optimize cache misses in the
> > >    submission path"?  (Against which I have checkpatch fixes and
> > >    #include linux/prefetch.h, btw)
> > 
> > It has mostly been merged, including all whitespace fixes and some
> > folding.  What is missing is the last two patchees because I don't
> > want to put the request_queue caching in until the remaining
> > lifetime issues for the request queue are sorted out, and the last
> > patch (which would need prefetch.h) depends on it.
> 
> I asked Jens in person and he seemed ok with with the queue 
> caching. Jens can you ack?

If you are caching queue in block device, you probably need to take
queue reference too using blk_get_queue().

Thanks
Vivek
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