Re: [RFT PATCH] blkio: alloc per cpu data from worker threadcontext( Re: kvm deadlock)

[Tejun Heo]

Hello,

On Tue, Dec 20, 2011 at 09:50:24AM -0500, Vivek Goyal wrote:
> So IIUC, existing mempool implementation is not directly usable for my
> requirement and I need to write some code of my own for the caching
> layer which always allocates objects from reserve and fills in the
> pool asynchronously with the help of a worker thread.

I've been looking at it and don't think allowing percpu allocator to
be called from no io path is a good idea.  The on-demand area filling
is tied into vmalloc area management which in turn is tied to arch
page table code and I really want to avoid pre-allocating full chunk -
it can be huge.  I'm trying to extend mempool to cover percpu areas,
so please wait a bit.

Thanks.

-- 
tejun
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