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Message-Id: <1193416643.7486.8.camel@heimdal.trondhjem.org>
Date:	Fri, 26 Oct 2007 12:37:23 -0400
From:	Trond Myklebust <trond.myklebust@....uio.no>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Kay Sievers <kay.sievers@...y.org>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Jens Axboe <jens.axboe@...cle.com>,
	Fengguang Wu <fengguang.wu@...il.com>, greg@...ah.com,
	Miklos Szeredi <miklos@...redi.hu>
Subject: Re: per BDI dirty limit (was Re: -mm merge plans for 2.6.24)


On Fri, 2007-10-26 at 16:48 +0200, Peter Zijlstra wrote:

> Miklos, Trond: could you suggest a better fmt for the bdi_init_fmt() for your
> respective filesystems?
<snip>
> Index: linux-2.6-2/fs/nfs/client.c
> ===================================================================
> --- linux-2.6-2.orig/fs/nfs/client.c
> +++ linux-2.6-2/fs/nfs/client.c
> @@ -678,7 +678,7 @@ static int nfs_probe_fsinfo(struct nfs_s
>  		goto out_error;
>  
>  	nfs_server_set_fsinfo(server, &fsinfo);
> -	error = bdi_init(&server->backing_dev_info);
> +	error = bdi_init_fmt(&server->backing_dev_info, "nfs-%s-%p", clp->cl_hostname, server);

In our debugging printks, we usually use the superblock->s_id, but that
only gets initialised later.

I'd suggest passing the 'dev_name' from *_get_sb() into
*_create_server().

Cheers
  Trond

-
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