linux-kernel - Re: [PATCH 09/11] writeback: separate starting of sync vs opportunistic writeback

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Date:	Wed, 16 Sep 2009 15:05:06 +0200
From:	Jan Kara <jack@...e.cz>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	chris.mason@...cle.com, hch@...radead.org, tytso@....edu,
	akpm@...ux-foundation.org, jack@...e.cz, trond.myklebust@....uio.no
Subject: Re: [PATCH 09/11] writeback: separate starting of sync vs
	opportunistic writeback

On Tue 15-09-09 20:16:55, Jens Axboe wrote:
> bdi_start_writeback() is currently split into two paths, one for
> WB_SYNC_NONE and one for WB_SYNC_ALL. Add bdi_sync_writeback()
> for WB_SYNC_ALL writeback and let bdi_start_writeback() handle
> only WB_SYNC_NONE.
> 
> Push down the writeback_control allocation and only accept the
> parameters that make sense for each function. This cleans up
> the API considerably.
  Nice cleanup!

> @@ -771,6 +798,8 @@ static long wb_check_old_data_flush(struct bdi_writeback *wb)
>  		struct wb_writeback_args args = {
>  			.nr_pages	= nr_pages,
>  			.sync_mode	= WB_SYNC_NONE,
> +			.for_kupdate	= 1,
> +			.range_cyclic	= 1,
>  		};
>  
>  		return wb_writeback(wb, &args);
  This chunk should be in patch number 4.

									Honza
-- 
Jan Kara <jack@...e.cz>
SUSE Labs, CR
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