| Date | Tue, 8 Jan 2013 13:08:04 -0500 | From | Vivek Goyal <> | Subject | Re: [PATCH 21/24] blkcg: make blkcg_print_blkgs() grab q locks instead of blkcg lock |
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On Fri, Dec 28, 2012 at 12:35:43PM -0800, Tejun Heo wrote: > Instead of holding blkcg->lock while walking ->blkg_list and executing > prfill(), RCU walk ->blkg_list and hold the blkg's queue lock while > executing prfill(). This makes prfill() implementations easier as > stats are mostly protected by queue lock. > > This will be used to implement hierarchical stats. > > Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Vivek
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