linux-kernel - Re: [PATCH 40/51] writeback: make bdi_start_background_writeback() take bdi_writeback instead of backing_dev

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Message-ID: <20150702022946.GJ26440@mtj.duckdns.org>
Date:	Wed, 1 Jul 2015 22:29:46 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Jan Kara <jack@...e.cz>
Cc:	axboe@...nel.dk, linux-kernel@...r.kernel.org, hch@...radead.org,
	hannes@...xchg.org, linux-fsdevel@...r.kernel.org,
	vgoyal@...hat.com, lizefan@...wei.com, cgroups@...r.kernel.org,
	linux-mm@...ck.org, mhocko@...e.cz, clm@...com,
	fengguang.wu@...el.com, david@...morbit.com, gthelen@...gle.com,
	khlebnikov@...dex-team.ru
Subject: Re: [PATCH 40/51] writeback: make bdi_start_background_writeback()
 take bdi_writeback instead of backing_dev_info

On Wed, Jul 01, 2015 at 09:50:09AM +0200, Jan Kara wrote:
> Can we add a memcg id of the wb to the tracepoint please? Because just bdi
> needn't be enough when debugging stuff...

Sure, will add cgroup path to identify the actual wb.  css IDs aren't
visible to userland.

Thanks.

-- 
tejun
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