linux-kernel - Re: [PATCH 0/11] Per-bdi writeback flusher threads v9

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Message-ID: <20090529170742.GI11363@kernel.dk>
Date:	Fri, 29 May 2009 19:07:43 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Artem Bityutskiy <Artem.Bityutskiy@...ia.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	"tytso@....edu" <tytso@....edu>,
	"chris.mason@...cle.com" <chris.mason@...cle.com>,
	"david@...morbit.com" <david@...morbit.com>,
	"hch@...radead.org" <hch@...radead.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"jack@...e.cz" <jack@...e.cz>,
	"yanmin_zhang@...ux.intel.com" <yanmin_zhang@...ux.intel.com>,
	"richard@....demon.co.uk" <richard@....demon.co.uk>,
	"damien.wyart@...e.fr" <damien.wyart@...e.fr>
Subject: Re: [PATCH 0/11] Per-bdi writeback flusher threads v9

On Fri, May 29 2009, Artem Bityutskiy wrote:
> Jens Axboe wrote:
>>> diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
>>> index 2349e2c..d1ac967 100644
>>> --- a/fs/ubifs/super.c
>>> +++ b/fs/ubifs/super.c
>>> @@ -1929,6 +1929,9 @@ static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
>>> 	err  = bdi_init(&c->bdi);
>>> 	if (err)
>>> 		goto out_close;
>>> +	err = bdi_register(&c->bdi, NULL, "ubifs");
>>> +	if (err)
>>> +		goto out_close;
>>
>> Not quite right, you need to call bdi_destroy() if you have done the
>> init.
>
> Right, bdi_destroy() is already there for long time.
> I'm confused.
>
>> I committed this one this morning:
>>
>> http://git.kernel.dk/?p=linux-2.6-block.git;a=commit;h=570a2fe1df85741988ad0ca22aa406744436e281
>
> Hmm, it is the same as my patch, but you do
> +       err = bdi_register(&c->bdi);
> while I do
> +	err = bdi_register(&c->bdi, NULL, "ubifs");

Oops, that's my bad. If you combine the two, we should have a working
patch :-)

>> But feel free to commit/submit to the ubifs tree directly, then it'll
>> disappear from my tree once it is merged.
>
> Yeah, I think it can go via my tree. I'd merge it at
> 2.6.31 window. This change does not depend on your
> work anyway.

Right, I'll just carry the fixup patches meanwhile as well, but wont
upstream them.

-- 
Jens Axboe

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