Messages in this thread | | | Date | Tue, 12 Jun 2012 19:52:19 +0800 | From | Fengguang Wu <> | Subject | Re: [PATCH v2] writeback: avoid race when update bandwidth |
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On Tue, Jun 12, 2012 at 07:46:01PM +0800, Wanpeng Li wrote: > From: Wanpeng Li <liwp@linux.vnet.ibm.com> > > "V1 -> V2" > * remove dirty_lock > > Since bdi->wb.list_lock is used to protect the b_* lists, > so the flushers who call wb_writeback to writeback pages will > stuck when bandwidth update policy holds this lock. In order > to avoid this race we can introduce a new bandwidth_lock who > is responsible for protecting bandwidth update policy. > > Signed-off-by: Wanpeng Li <liwp.linux@gmail.com>
Applied with a new title "writeback: use a standalone lock for updating write bandwidth". "race" is sensitive because it often refers to some locking error.
Thank you!
Fengguang
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