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Date: Wed, 25 Oct 2017 11:20:42 -0700 From: Jens Axboe <axboe@...nel.dk> To: Ingo Molnar <mingo@...nel.org>, Byungchul Park <byungchul.park@....com> Cc: peterz@...radead.org, johan@...nel.org, tglx@...utronix.de, linux-kernel@...r.kernel.org, linux-mm@...ck.org, tj@...nel.org, johannes.berg@...el.com, oleg@...hat.com, amir73il@...il.com, david@...morbit.com, darrick.wong@...cle.com, linux-xfs@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-block@...r.kernel.org, hch@...radead.org, idryomov@...il.com, kernel-team@....com Subject: Re: [PATCH v5 9/9] block: Assign a lock_class per gendisk used for wait_for_completion() On 10/25/2017 03:13 AM, Ingo Molnar wrote: > > * Byungchul Park <byungchul.park@....com> wrote: > >> Darrick posted the following warning and Dave Chinner analyzed it: >> >>> ====================================================== >>> WARNING: possible circular locking dependency detected >>> 4.14.0-rc1-fixes #1 Tainted: G W > >> Reported-by: Darrick J. Wong <darrick.wong@...cle.com> >> Analyzed-by: Dave Chinner <david@...morbit.com> >> Signed-off-by: Byungchul Park <byungchul.park@....com> >> --- >> block/bio.c | 2 +- >> block/genhd.c | 10 ++-------- >> include/linux/genhd.h | 22 ++++++++++++++++++++-- >> 3 files changed, 23 insertions(+), 11 deletions(-) > > Ok, this patch looks good to me now, I'll wait to get an Ack or Nak from Jens for > these changes. > > Jens: this patch has some dependencies in prior lockdep changes, so I'd like to > carry it in the locking tree for a v4.15 merge. Looks fine to me, you can add my reviewed-by and carry it in your tree. -- Jens Axboe
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