linux-kernel - [PATCH 0/5] Bug fix for recent batching change

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Date:   Wed, 27 Jul 2022 15:05:55 -0600
From:   Logan Gunthorpe <logang@...tatee.com>
To:     linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org,
        Song Liu <song@...nel.org>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Guoqing Jiang <guoqing.jiang@...ux.dev>,
        Stephen Bates <sbates@...thlin.com>,
        Martin Oliveira <Martin.Oliveira@...eticom.com>,
        David Sloan <David.Sloan@...eticom.com>,
        Logan Gunthorpe <logang@...tatee.com>
Subject: [PATCH 0/5] Bug fix for recent batching change

Hey,

We hit another bug on my recent batching patch. In this case the
bug has never been hit with the current md/md-next branch but
some other patches we were working on changed the timing such
that we hit this bug. It is theoretically possible to hit in
the md/md-next batch so this patchset contains a fix.

The fix is the last commit. The first four commits are some
basic refactoring that makes the final commit a bit easier.

A git repo is here and is based on current md/md-next (7a6f9e9cf1):

   https://github.com/sbates130272/linux-p2pmem raid5_batch_quiesce

Thanks,

Logan

--

Logan Gunthorpe (5):
  md/raid5: Refactor raid5_get_active_stripe()
  md/raid5: Make is_inactive_blocked() helper
  md/raid5: Drop unnecessary call to r5c_check_stripe_cache_usage()
  md/raid5: Move stripe_request_ctx up
  md/raid5: Ensure batch_last is released before sleeping for quiesce

 drivers/md/raid5.c | 162 ++++++++++++++++++++++++++++-----------------
 drivers/md/raid5.h |   2 +-
 2 files changed, 101 insertions(+), 63 deletions(-)


base-commit: 7a6f9e9cf1befa0a1578501966d3c9b0cae46727
--
2.30.2