Date: Wed, 24 Feb 2010 15:09:16 -0500 (EST)
From: Alan Stern <stern@rowland.harvard.edu>
To: Jens Axboe <jens.axboe@oracle.com>
cc: linux-pm <linux-pm@lists.linux-foundation.org>,
       linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: Testing for dirty buffers on a block device
In-Reply-To: <20100224190942.GG1025@kernel.dk>
Message-ID: <Pine.LNX.4.44L0.1002241503300.1253-100000@iolanthe.rowland.org>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 929
Lines: 23

On Wed, 24 Feb 2010, Jens Axboe wrote:

> > > But if you wanted, I guess the only way would be to lookup
> > > dirty/writeback pages on the bdev inode mapping. For that you'd need the
> > > bdev, not the gendisk or the queue though.
> > 
> > I can get the bdev from the gendisk by calling bdget_disk() with a 
> > partition number of 0, right?  What would the next step be?  Would this 
> > check for dirty pages associated with any of the partitions or would it 
> > only look at pages associated with the inode for the entire disk?
> 
> It would cover the entire bdev.

Okay, so once I've got the bdev, how do I look up the dirty/writeback 
pages on the inode mapping?

Alan Stern

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/