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Re: [PATCH 1/8] xfs: use per-filesystem I/O completion workqueues

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: [PATCH 1/8] xfs: use per-filesystem I/O completion workqueues
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Tue, 21 Feb 2012 15:58:11 +1100
Cc: xfs@xxxxxxxxxxx
In-reply-to: <20120221003906.124899527@xxxxxxxxxxxxxxxxxxxxxx>
References: <20120221003824.415885674@xxxxxxxxxxxxxxxxxxxxxx> <20120221003906.124899527@xxxxxxxxxxxxxxxxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)
On Mon, Feb 20, 2012 at 07:38:25PM -0500, Christoph Hellwig wrote:
> The new concurrency managed workqueues are cheap enough that we can create
> per-filesystem instead of global workqueues.  This allows us to remove the
> trylock or defer scheme on the ilock, which is not helpful once we have
> outstanding log reservations until finishing a size update.
> 
> Also allow the default concurrency on this workqueues so that I/O completions
> blocking on the ilock for one inode do not block process for another inode.
> 
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>

Looks good.

Reviewed-by: Dave Chinner <dchinner@xxxxxxxxxx>
-- 
Dave Chinner
david@xxxxxxxxxxxxx

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