From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To: Dan Williams <dan.j.williams@intel.com>,
Arnd Bergmann <arnd@arndb.de>, Dave Chinner <david@fromorbit.com>
Cc: linux-kernel@vger.kernel.org,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Vishal Verma <vishal.l.verma@intel.com>,
Dave Jiang <dave.jiang@intel.com>,
Matthew Wilcox <willy@infradead.org>,
Russell King <linux@armlinux.org.uk>,
linux-arch@vger.kernel.org, linux-cxl@vger.kernel.org,
linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
linux-xfs@vger.kernel.org, dm-devel@lists.linux.dev,
nvdimm@lists.linux.dev, linux-s390@vger.kernel.org,
Alasdair Kergon <agk@redhat.com>,
Mike Snitzer <snitzer@kernel.org>,
Mikulas Patocka <mpatocka@redhat.com>
Subject: [PATCH v4 03/12] dm: Treat alloc_dax() -EOPNOTSUPP failure as non-fatal
Date: Thu, 8 Feb 2024 13:49:04 -0500 [thread overview]
Message-ID: <20240208184913.484340-4-mathieu.desnoyers@efficios.com> (raw)
In-Reply-To: <20240208184913.484340-1-mathieu.desnoyers@efficios.com>
In preparation for checking whether the architecture has data cache
aliasing within alloc_dax(), modify the error handling of dm alloc_dev()
to treat alloc_dax() -EOPNOTSUPP failure as non-fatal.
For the transition, consider that alloc_dax() returning NULL is the
same as returning -EOPNOTSUPP.
Fixes: d92576f1167c ("dax: does not work correctly with virtual aliasing caches")
Suggested-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: Mike Snitzer <snitzer@kernel.org>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: linux-arch@vger.kernel.org
Cc: linux-cxl@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-mm@kvack.org
Cc: linux-xfs@vger.kernel.org
Cc: dm-devel@lists.linux.dev
Cc: nvdimm@lists.linux.dev
---
drivers/md/dm.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 23c32cd1f1d8..2fc22cae9089 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -2054,6 +2054,7 @@ static void cleanup_mapped_device(struct mapped_device *md)
static struct mapped_device *alloc_dev(int minor)
{
int r, numa_node_id = dm_get_numa_node();
+ struct dax_device *dax_dev;
struct mapped_device *md;
void *old_md;
@@ -2122,15 +2123,15 @@ static struct mapped_device *alloc_dev(int minor)
md->disk->private_data = md;
sprintf(md->disk->disk_name, "dm-%d", minor);
- if (IS_ENABLED(CONFIG_FS_DAX)) {
- md->dax_dev = alloc_dax(md, &dm_dax_ops);
- if (IS_ERR(md->dax_dev)) {
- md->dax_dev = NULL;
+ dax_dev = alloc_dax(md, &dm_dax_ops);
+ if (IS_ERR_OR_NULL(dax_dev)) {
+ if (IS_ERR(dax_dev) && PTR_ERR(dax_dev) != -EOPNOTSUPP)
goto bad;
- }
- set_dax_nocache(md->dax_dev);
- set_dax_nomc(md->dax_dev);
- if (dax_add_host(md->dax_dev, md->disk))
+ } else {
+ set_dax_nocache(dax_dev);
+ set_dax_nomc(dax_dev);
+ md->dax_dev = dax_dev;
+ if (dax_add_host(dax_dev, md->disk))
goto bad;
}
--
2.39.2
next prev parent reply other threads:[~2024-02-08 18:49 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-08 18:49 [PATCH v4 00/12] Introduce cpu_dcache_is_aliasing() to fix DAX regression Mathieu Desnoyers
2024-02-08 18:49 ` [PATCH v4 01/12] nvdimm/pmem: Fix leak on dax_add_host() failure Mathieu Desnoyers
2024-02-08 21:21 ` Andrew Morton
2024-02-08 22:04 ` Mathieu Desnoyers
2024-02-08 22:12 ` Andrew Morton
2024-02-08 22:16 ` Mathieu Desnoyers
2024-02-08 21:28 ` Dan Williams
2024-02-08 18:49 ` [PATCH v4 02/12] nvdimm/pmem: Treat alloc_dax() -EOPNOTSUPP failure as non-fatal Mathieu Desnoyers
2024-02-08 21:32 ` Dan Williams
2024-02-08 22:07 ` Mathieu Desnoyers
2024-02-08 18:49 ` Mathieu Desnoyers [this message]
2024-02-08 21:34 ` [PATCH v4 03/12] dm: " Dan Williams
2024-02-08 22:07 ` Mathieu Desnoyers
2024-02-08 18:49 ` [PATCH v4 04/12] dcssblk: Handle alloc_dax() -EOPNOTSUPP failure Mathieu Desnoyers
2024-02-08 21:36 ` Dan Williams
2024-02-08 22:08 ` Mathieu Desnoyers
2024-02-08 18:49 ` [PATCH v4 05/12] virtio: Treat alloc_dax() -EOPNOTSUPP failure as non-fatal Mathieu Desnoyers
2024-02-08 21:37 ` Dan Williams
2024-02-08 22:09 ` Mathieu Desnoyers
2024-02-08 18:49 ` [PATCH v4 06/12] dax: Check for data cache aliasing at runtime Mathieu Desnoyers
2024-02-08 21:39 ` Dan Williams
2024-02-08 22:10 ` Mathieu Desnoyers
2024-02-08 22:37 ` Dan Williams
2024-02-08 22:42 ` Mathieu Desnoyers
2024-02-09 1:01 ` Dan Williams
2024-02-08 18:49 ` [PATCH v4 07/12] Introduce cpu_dcache_is_aliasing() across all architectures Mathieu Desnoyers
2024-02-08 21:52 ` Dan Williams
2024-02-08 18:49 ` [PATCH v4 08/12] dax: Fix incorrect list of data cache aliasing architectures Mathieu Desnoyers
2024-02-08 21:52 ` Dan Williams
2024-02-08 18:49 ` [PATCH v4 09/12] nvdimm/pmem: Cleanup alloc_dax() error handling Mathieu Desnoyers
2024-02-08 21:55 ` Dan Williams
2024-02-08 22:12 ` Mathieu Desnoyers
2024-02-08 18:49 ` [PATCH v4 10/12] dm: " Mathieu Desnoyers
2024-02-08 18:49 ` [PATCH v4 11/12] dcssblk: " Mathieu Desnoyers
2024-02-08 18:49 ` [PATCH v4 12/12] virtio: " Mathieu Desnoyers
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