From: Christoph Hellwig <hch@infradead.org>
To: Jane Chu <jane.chu@oracle.com>
Cc: david@fromorbit.com, djwong@kernel.org, dan.j.williams@intel.com,
hch@infradead.org, vishal.l.verma@intel.com,
dave.jiang@intel.com, agk@redhat.com, snitzer@redhat.com,
dm-devel@redhat.com, ira.weiny@intel.com, willy@infradead.org,
vgoyal@redhat.com, linux-fsdevel@vger.kernel.org,
nvdimm@lists.linux.dev, linux-kernel@vger.kernel.org,
linux-xfs@vger.kernel.org
Subject: Re: [PATCH v5 2/7] dax: introduce dax device flag DAXDEV_RECOVERY
Date: Wed, 2 Feb 2022 05:23:05 -0800 [thread overview]
Message-ID: <YfqFuUsvuUUUWKfu@infradead.org> (raw)
In-Reply-To: <20220128213150.1333552-3-jane.chu@oracle.com>
On Fri, Jan 28, 2022 at 02:31:45PM -0700, Jane Chu wrote:
> +int dax_prep_recovery(struct dax_device *dax_dev, void **kaddr)
> +{
> + if (dax_recovery_capable(dax_dev)) {
> + set_bit(DAXDEV_RECOVERY, (unsigned long *)kaddr);
> + return 0;
> + }
> + return -EINVAL;
Setting a random bit on a passed in memory address looks a little
dangerous to me.
Also I'd return early for the EINVAL case to make the flow a little
more clear.
next prev parent reply other threads:[~2022-02-02 13:23 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-28 21:31 [PATCH v5 0/7] DAX poison recovery Jane Chu
2022-01-28 21:31 ` [PATCH v5 1/7] mce: fix set_mce_nospec to always unmap the whole page Jane Chu
2022-02-02 13:21 ` Christoph Hellwig
2022-02-02 21:20 ` Jane Chu
2022-02-02 23:07 ` Jane Chu
2022-02-03 13:42 ` Christoph Hellwig
2022-02-04 5:23 ` Dan Williams
2022-02-06 8:30 ` Jane Chu
2022-01-28 21:31 ` [PATCH v5 2/7] dax: introduce dax device flag DAXDEV_RECOVERY Jane Chu
2022-02-02 13:23 ` Christoph Hellwig [this message]
2022-02-02 21:27 ` Jane Chu
2022-02-03 13:43 ` Christoph Hellwig
2022-02-04 5:17 ` Dan Williams
2022-02-04 5:32 ` Dan Williams
2022-02-06 8:29 ` Jane Chu
2022-01-28 21:31 ` [PATCH v5 3/7] dm: make dm aware of target's DAXDEV_RECOVERY capability Jane Chu
2022-02-04 5:34 ` Dan Williams
2022-02-06 8:27 ` Jane Chu
2022-01-28 21:31 ` [PATCH v5 4/7] dax: add dax_recovery_write to dax_op and dm target type Jane Chu
2022-02-02 13:34 ` Christoph Hellwig
2022-02-02 22:03 ` Jane Chu
2022-02-04 6:03 ` Dan Williams
2022-02-06 8:25 ` Jane Chu
2022-01-28 21:31 ` [PATCH v5 5/7] pmem: add pmem_recovery_write() dax op Jane Chu
2022-02-02 13:43 ` Christoph Hellwig
2022-02-02 22:13 ` Jane Chu
2022-02-04 6:21 ` Dan Williams
2022-02-06 8:08 ` Jane Chu
2022-01-28 21:31 ` [PATCH v5 6/7] dax: add recovery_write to dax_iomap_iter in failure path Jane Chu
2022-02-02 13:44 ` Christoph Hellwig
2022-02-02 22:18 ` Jane Chu
2022-01-28 21:31 ` [PATCH v5 7/7] pmem: fix pmem_do_write() avoid writing to 'np' page Jane Chu
2022-02-02 13:28 ` Christoph Hellwig
2022-02-02 21:31 ` Jane Chu
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