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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: Mark Tinguely <tinguely@xxxxxxx>
Date: Tue, 28 Feb 2012 10:13:17 -0600
Cc: xfs@xxxxxxxxxxx
In-reply-to: <20120221003906.124899527@xxxxxxxxxxxxxxxxxxxxxx>
References: <20120221003824.415885674@xxxxxxxxxxxxxxxxxxxxxx> <20120221003906.124899527@xxxxxxxxxxxxxxxxxxxxxx>
User-agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:9.0) Gecko/20120122 Thunderbird/9.0
On 02/20/12 18:38, 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: Mark Tinguely <tinguely@xxxxxxx>

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