[PATCH 2 1/2] dax: change bdev_dax_supported() to take a block_device as input
by Dave Jiang
This is in preparation to support DAX for realtime device on XFS.
bdev_dax_supported() will be taking a block_device as input instead of
a superblock. The only place a super_block is used in this function is
providing the id for debug outputs. Also __bdev_dax_supported()
will be removed since it just directly calls bdev_dax_supported()
and is not reference by any other code.
Signed-off-by: Dave Jiang <dave.jiang(a)intel.com>
---
drivers/dax/super.c | 33 ++++++++++++++++-----------------
fs/ext2/super.c | 2 +-
fs/ext4/super.c | 2 +-
fs/xfs/xfs_ioctl.c | 2 +-
fs/xfs/xfs_super.c | 2 +-
include/linux/dax.h | 8 ++------
6 files changed, 22 insertions(+), 27 deletions(-)
diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index 473af694ad1c..3bdf6787b6df 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -70,11 +70,10 @@ struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev)
return fs_dax_get_by_host(bdev->bd_disk->disk_name);
}
EXPORT_SYMBOL_GPL(fs_dax_get_by_bdev);
-#endif
/**
- * __bdev_dax_supported() - Check if the device supports dax for filesystem
- * @sb: The superblock of the device
+ * bdev_dax_supported() - Check if the device supports dax for filesystem
+ * @sb: The block_device of the device
* @blocksize: The block size of the device
*
* This is a library function for filesystems to check if the block device
@@ -82,9 +81,8 @@ EXPORT_SYMBOL_GPL(fs_dax_get_by_bdev);
*
* Return: negative errno if unsupported, 0 if supported.
*/
-int __bdev_dax_supported(struct super_block *sb, int blocksize)
+int bdev_dax_supported(struct block_device *bdev, int blocksize)
{
- struct block_device *bdev = sb->s_bdev;
struct dax_device *dax_dev;
pgoff_t pgoff;
int err, id;
@@ -93,22 +91,22 @@ int __bdev_dax_supported(struct super_block *sb, int blocksize)
long len;
if (blocksize != PAGE_SIZE) {
- pr_debug("VFS (%s): error: unsupported blocksize for dax\n",
- sb->s_id);
+ pr_debug("bdev (%d:%d): error: unsupported blocksize for dax\n",
+ MAJOR(bdev->bd_dev), MINOR(bdev->bd_dev));
return -EINVAL;
}
err = bdev_dax_pgoff(bdev, 0, PAGE_SIZE, &pgoff);
if (err) {
- pr_debug("VFS (%s): error: unaligned partition for dax\n",
- sb->s_id);
+ pr_debug("bdev (%d:%d): error: unaligned partition for dax\n",
+ MAJOR(bdev->bd_dev), MINOR(bdev->bd_dev));
return err;
}
dax_dev = dax_get_by_host(bdev->bd_disk->disk_name);
if (!dax_dev) {
- pr_debug("VFS (%s): error: device does not support dax\n",
- sb->s_id);
+ pr_debug("bdev (%d:%d): error: device does not support dax\n",
+ MAJOR(bdev->bd_dev), MINOR(bdev->bd_dev));
return -EOPNOTSUPP;
}
@@ -119,8 +117,8 @@ int __bdev_dax_supported(struct super_block *sb, int blocksize)
put_dax(dax_dev);
if (len < 1) {
- pr_debug("VFS (%s): error: dax access failed (%ld)\n",
- sb->s_id, len);
+ pr_debug("bdev (%d:%d): error: dax access failed (%ld)\n",
+ MAJOR(bdev->bd_dev), MINOR(bdev->bd_dev), len);
return len < 0 ? len : -EIO;
}
@@ -128,15 +126,16 @@ int __bdev_dax_supported(struct super_block *sb, int blocksize)
|| pfn_t_devmap(pfn))
/* pass */;
else {
- pr_debug("VFS (%s): error: dax support not enabled\n",
- sb->s_id);
+ pr_debug("bdev (%d:%d): error: dax support not enabled\n",
+ MAJOR(bdev->bd_dev), MINOR(bdev->bd_dev));
return -EOPNOTSUPP;
}
return 0;
}
-EXPORT_SYMBOL_GPL(__bdev_dax_supported);
-#endif
+EXPORT_SYMBOL_GPL(bdev_dax_supported);
+#endif /* CONFIG_FS_DAX */
+#endif /* CONFIG_BLOCK */
enum dax_device_flags {
/* !alive + rcu grace period == no new operations / mappings */
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 38f9222606ee..a0de090b18d5 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -958,7 +958,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
blocksize = BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size);
if (sbi->s_mount_opt & EXT2_MOUNT_DAX) {
- err = bdev_dax_supported(sb, blocksize);
+ err = bdev_dax_supported(sb->s_bdev, blocksize);
if (err) {
ext2_msg(sb, KERN_ERR,
"DAX unsupported by block device. Turning off DAX.");
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 18873ea89e08..7ebc8d5cab8c 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3712,7 +3712,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
" that may contain inline data");
sbi->s_mount_opt &= ~EXT4_MOUNT_DAX;
}
- err = bdev_dax_supported(sb, blocksize);
+ err = bdev_dax_supported(sb->s_bdev, blocksize);
if (err) {
ext4_msg(sb, KERN_ERR,
"DAX unsupported by block device. Turning off DAX.");
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 20dc65fef6a4..5fd4d50eb1c6 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -1102,7 +1102,7 @@ xfs_ioctl_setattr_dax_invalidate(
if (fa->fsx_xflags & FS_XFLAG_DAX) {
if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
return -EINVAL;
- if (bdev_dax_supported(sb, sb->s_blocksize) < 0)
+ if (bdev_dax_supported(sb->s_bdev, sb->s_blocksize) < 0)
return -EINVAL;
}
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 1dacccc367f8..e8a687232614 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1652,7 +1652,7 @@ xfs_fs_fill_super(
xfs_warn(mp,
"DAX enabled. Warning: EXPERIMENTAL, use at your own risk");
- error = bdev_dax_supported(sb, sb->s_blocksize);
+ error = bdev_dax_supported(sb->s_bdev, sb->s_blocksize);
if (error) {
xfs_alert(mp,
"DAX unsupported by block device. Turning off DAX.");
diff --git a/include/linux/dax.h b/include/linux/dax.h
index 5258346c558c..a31a7e3f929b 100644
--- a/include/linux/dax.h
+++ b/include/linux/dax.h
@@ -40,11 +40,7 @@ static inline void put_dax(struct dax_device *dax_dev)
int bdev_dax_pgoff(struct block_device *, sector_t, size_t, pgoff_t *pgoff);
#if IS_ENABLED(CONFIG_FS_DAX)
-int __bdev_dax_supported(struct super_block *sb, int blocksize);
-static inline int bdev_dax_supported(struct super_block *sb, int blocksize)
-{
- return __bdev_dax_supported(sb, blocksize);
-}
+int bdev_dax_supported(struct block_device *bdev, int blocksize);
static inline struct dax_device *fs_dax_get_by_host(const char *host)
{
@@ -58,7 +54,7 @@ static inline void fs_put_dax(struct dax_device *dax_dev)
struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev);
#else
-static inline int bdev_dax_supported(struct super_block *sb, int blocksize)
+static inline int bdev_dax_supported(struct block_device *bdev, int blocksize)
{
return -EOPNOTSUPP;
}
2 years, 7 months
[PATCH 1/2] ndctl: add check for update firmware supported
by Dave Jiang
Adding generic and intel support function to allow check if update firmware
is supported by the kernel.
Signed-off-by: Dave Jiang <dave.jiang(a)intel.com>
---
ndctl/lib/firmware.c | 11 +++++++++++
ndctl/lib/intel.c | 24 ++++++++++++++++++++++++
ndctl/lib/libndctl.sym | 1 +
ndctl/lib/private.h | 1 +
ndctl/libndctl.h | 1 +
ndctl/update.c | 4 ++++
6 files changed, 42 insertions(+)
diff --git a/ndctl/lib/firmware.c b/ndctl/lib/firmware.c
index f6deec5d..78d753ca 100644
--- a/ndctl/lib/firmware.c
+++ b/ndctl/lib/firmware.c
@@ -107,3 +107,14 @@ ndctl_cmd_fw_xlat_firmware_status(struct ndctl_cmd *cmd)
else
return FW_EUNKNOWN;
}
+
+NDCTL_EXPORT bool
+ndctl_dimm_fw_update_supported(struct ndctl_dimm *dimm)
+{
+ struct ndctl_dimm_ops *ops = dimm->ops;
+
+ if (ops && ops->fw_update_supported)
+ return ops->fw_update_supported(dimm);
+ else
+ return false;
+}
diff --git a/ndctl/lib/intel.c b/ndctl/lib/intel.c
index cee5204c..7d976c50 100644
--- a/ndctl/lib/intel.c
+++ b/ndctl/lib/intel.c
@@ -650,6 +650,29 @@ intel_dimm_cmd_new_lss(struct ndctl_dimm *dimm)
return cmd;
}
+static bool intel_dimm_fw_update_supported(struct ndctl_dimm *dimm)
+{
+ struct ndctl_ctx *ctx = ndctl_dimm_get_ctx(dimm);
+
+ if (!ndctl_dimm_is_cmd_supported(dimm, ND_CMD_CALL)) {
+ dbg(ctx, "unsupported cmd: %d\n", ND_CMD_CALL);
+ return false;
+ }
+
+ /*
+ * We only need to check FW_GET_INFO. If that isn't supported then
+ * the others aren't either.
+ */
+ if (test_dimm_dsm(dimm, ND_INTEL_FW_GET_INFO)
+ == DIMM_DSM_UNSUPPORTED) {
+ dbg(ctx, "unsupported function: %d\n",
+ ND_INTEL_FW_GET_INFO);
+ return false;
+ }
+
+ return true;
+}
+
struct ndctl_dimm_ops * const intel_dimm_ops = &(struct ndctl_dimm_ops) {
.cmd_desc = intel_cmd_desc,
.new_smart = intel_dimm_cmd_new_smart,
@@ -703,4 +726,5 @@ struct ndctl_dimm_ops * const intel_dimm_ops = &(struct ndctl_dimm_ops) {
.fw_fquery_get_fw_rev = intel_cmd_fw_fquery_get_fw_rev,
.fw_xlat_firmware_status = intel_cmd_fw_xlat_firmware_status,
.new_ack_shutdown_count = intel_dimm_cmd_new_lss,
+ .fw_update_supported = intel_dimm_fw_update_supported,
};
diff --git a/ndctl/lib/libndctl.sym b/ndctl/lib/libndctl.sym
index af9b7d54..cc580f9c 100644
--- a/ndctl/lib/libndctl.sym
+++ b/ndctl/lib/libndctl.sym
@@ -344,4 +344,5 @@ global:
ndctl_cmd_fw_fquery_get_fw_rev;
ndctl_cmd_fw_xlat_firmware_status;
ndctl_dimm_cmd_new_ack_shutdown_count;
+ ndctl_dimm_fw_update_supported;
} LIBNDCTL_13;
diff --git a/ndctl/lib/private.h b/ndctl/lib/private.h
index 015eeb2d..ae4454cf 100644
--- a/ndctl/lib/private.h
+++ b/ndctl/lib/private.h
@@ -325,6 +325,7 @@ struct ndctl_dimm_ops {
unsigned long long (*fw_fquery_get_fw_rev)(struct ndctl_cmd *);
enum ND_FW_STATUS (*fw_xlat_firmware_status)(struct ndctl_cmd *);
struct ndctl_cmd *(*new_ack_shutdown_count)(struct ndctl_dimm *);
+ bool (*fw_update_supported)(struct ndctl_dimm *);
};
struct ndctl_dimm_ops * const intel_dimm_ops;
diff --git a/ndctl/libndctl.h b/ndctl/libndctl.h
index 9db775ba..08030d35 100644
--- a/ndctl/libndctl.h
+++ b/ndctl/libndctl.h
@@ -625,6 +625,7 @@ unsigned int ndctl_cmd_fw_start_get_context(struct ndctl_cmd *cmd);
unsigned long long ndctl_cmd_fw_fquery_get_fw_rev(struct ndctl_cmd *cmd);
enum ND_FW_STATUS ndctl_cmd_fw_xlat_firmware_status(struct ndctl_cmd *cmd);
struct ndctl_cmd *ndctl_dimm_cmd_new_ack_shutdown_count(struct ndctl_dimm *dimm);
+bool ndctl_dimm_fw_update_supported(struct ndctl_dimm *dimm);
#ifdef __cplusplus
} /* extern "C" */
diff --git a/ndctl/update.c b/ndctl/update.c
index 0f0f0d81..72f5839b 100644
--- a/ndctl/update.c
+++ b/ndctl/update.c
@@ -454,6 +454,10 @@ static int get_ndctl_dimm(struct update_context *uctx, void *ctx)
ndctl_dimm_foreach(bus, dimm) {
if (!util_dimm_filter(dimm, uctx->dimm_id))
continue;
+ if (!ndctl_dimm_fw_update_supported(dimm)) {
+ error("DIMM firmware update not supported by the kernel.");
+ return -ENOTSUP;
+ }
uctx->dimm = dimm;
return 0;
}
2 years, 7 months
[PATCH v4 0/3] minimal DAX support for XFS realtime device
by Dave Jiang
Darrick,
After reading the comments from you, Dave Chinner, and Dan, it looks like
the dyanmic S_DAX flag support won't be coming or not any time soon at the
least. Here are the the collection of patches so far to address yours and
Dave C's comments for minimal support. Please let me know what else I am
missing. Thanks!
v3:
- Removed setting of error return in ext2 and ext4 per Ross's comments
- Rebased against 4.16-rc1 with updates
---
Darrick J. Wong (1):
fs: allow per-device dax status checking for filesystems
Dave Jiang (2):
dax: change bdev_dax_supported() to support boolean returns
xfs: reject removal of realtime flag when datadev doesn't support DAX
drivers/dax/super.c | 27 ++++++++++++++-------------
fs/ext2/super.c | 3 +--
fs/ext4/super.c | 3 +--
fs/xfs/xfs_ioctl.c | 18 +++++++++++++++++-
fs/xfs/xfs_iops.c | 30 +++++++++++++++++++++++++-----
fs/xfs/xfs_super.c | 11 +++++++++--
include/linux/dax.h | 18 +++++++++++++-----
7 files changed, 80 insertions(+), 30 deletions(-)
--
2 years, 7 months
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2 years, 7 months
[PATCH v4 00/12] vfio, dax: prevent long term filesystem-dax pins and other fixes
by Dan Williams
The following series implements...
Changes since v3 [1]:
* Kill IS_DAX() in favor of explicit IS_FSDAX() and IS_DEVDAX() helpers.
Jan noted, "having IS_DAX() and IS_FSDAX() doing almost the same, just
not exactly the same, is IMHO a recipe for confusion", and I agree. A
nice side effect of this elimination is a cleanup to remove occasions of
"#ifdef CONFIG_FS_DAX" in C files, it is all moved to header files
now. (Jan)
---
The vfio interface, like RDMA, wants to setup long term (indefinite)
pins of the pages backing an address range so that a guest or userspace
driver can perform DMA to the with physical address. Given that this
pinning may lead to filesystem operations deadlocking in the
filesystem-dax case, the pinning request needs to be rejected.
The longer term fix for vfio, RDMA, and any other long term pin user, is
to provide a 'pin with lease' mechanism. Similar to the leases that are
hold for pNFS RDMA layouts, this userspace lease gives the kernel a way
to notify userspace that the block layout of the file is changing and
the kernel is revoking access to pinned pages.
Related to this change is the discovery that vma_is_fsdax() was causing
device-dax inode detection to fail. That lead to series of fixes and
cleanups to make sure that S_DAX is defined correctly in the
CONFIG_FS_DAX=n + CONFIG_DEV_DAX=y case.
---
Dan Williams (12):
dax: fix vma_is_fsdax() helper
dax: introduce IS_DEVDAX() and IS_FSDAX()
ext2, dax: finish implementing dax_sem helpers
ext2, dax: define ext2_dax_*() infrastructure in all cases
ext4, dax: define ext4_dax_*() infrastructure in all cases
ext2, dax: replace IS_DAX() with IS_FSDAX()
ext4, dax: replace IS_DAX() with IS_FSDAX()
xfs, dax: replace IS_DAX() with IS_FSDAX()
mm, dax: replace IS_DAX() with IS_DEVDAX() or IS_FSDAX()
fs, dax: kill IS_DAX()
dax: fix S_DAX definition
vfio: disable filesystem-dax page pinning
drivers/vfio/vfio_iommu_type1.c | 18 ++++++++++++++--
fs/ext2/ext2.h | 6 +++++
fs/ext2/file.c | 19 +++++------------
fs/ext2/inode.c | 10 ++++-----
fs/ext4/file.c | 18 +++++-----------
fs/ext4/inode.c | 4 ++--
fs/ext4/ioctl.c | 2 +-
fs/ext4/super.c | 2 +-
fs/iomap.c | 2 +-
fs/xfs/xfs_file.c | 14 ++++++-------
fs/xfs/xfs_ioctl.c | 4 ++--
fs/xfs/xfs_iomap.c | 6 +++--
fs/xfs/xfs_reflink.c | 2 +-
include/linux/dax.h | 12 ++++++++---
include/linux/fs.h | 43 ++++++++++++++++++++++++++++-----------
mm/fadvise.c | 3 ++-
mm/filemap.c | 4 ++--
mm/huge_memory.c | 4 +++-
mm/madvise.c | 3 ++-
19 files changed, 102 insertions(+), 74 deletions(-)
2 years, 7 months
[PATCH v6 0/3] minimal DAX support for XFS realtime device
by Dave Jiang
Darrick,
After reading the comments from you, Dave Chinner, and Dan, it looks like
the dyanmic S_DAX flag support won't be coming or not any time soon at the
least. Here are the the collection of patches so far to address yours and
Dave C's comments for minimal support. Please let me know what else I am
missing. Thanks!
v6:
- Removed excess () per Christoph comment.
v5:
- Removed sb parameter for bdev_dax_supported() since we only use it for
debug output per Christoph comment.
v4:
- Removed setting of error return in ext2 and ext4 per Ross's comments
- Rebased against 4.16-rc1 with updates
---
Darrick J. Wong (1):
fs: allow per-device dax status checking for filesystems
Dave Jiang (2):
dax: change bdev_dax_supported() to support boolean returns
xfs: reject removal of realtime flag when datadev doesn't support DAX
drivers/dax/super.c | 44 ++++++++++++++++++++++----------------------
fs/ext2/super.c | 3 +--
fs/ext4/super.c | 3 +--
fs/xfs/xfs_ioctl.c | 17 ++++++++++++++++-
fs/xfs/xfs_iops.c | 30 +++++++++++++++++++++++++-----
fs/xfs/xfs_super.c | 10 ++++++++--
include/linux/dax.h | 12 ++++--------
7 files changed, 77 insertions(+), 42 deletions(-)
--
2 years, 7 months
[PATCH] dax: ->direct_access does not sleep anymore
by Boaz Harrosh
In Patch:
[7a862fb] brd: remove dax support
Dan Williams has removed the only might_sleep
implementation of ->direct_access.
So we no longer need to check for it.
CC: Dan Williams <dan.j.williams(a)intel.com>
Signed-off-by: Boaz Harrosh <boazh(a)netapp.com>
---
drivers/dax/super.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index 3ec8046..0a75550 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -236,12 +236,6 @@ long dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, long nr_pages,
{
long avail;
- /*
- * The device driver is allowed to sleep, in order to make the
- * memory directly accessible.
- */
- might_sleep();
-
if (!dax_dev)
return -EOPNOTSUPP;
--
2.5.5
2 years, 8 months
转发:/ 战略驱动的流程与组织变革
by 薄林牧
linux-nvdimm//
战略驱动的流程与组织变革
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主讲老师
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曾为上千家知名大中型企业及细分行业快速发展的中小企业提供专业的流程优化培训服务，并带领公司咨询团队为几百家企业
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陈博士还领导杰成团队开发了国内首套流程审计的要素和标准，以及流程和制度体系管理IT平台（EPROS），帮助流程管理部
门在公司内系统地推进流程规划、流程设计、流程发布、员工应用以及流程持续优化等工作。
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5、企业流程成熟度测评——从现状到未来
二、流程架构再造——以客户为中心重构流程系统
1、传统流程架构的缺陷
2、流程架构再造的步骤
识别支撑战略目标实现的关键业务能力
通过再造流程架构开发关键业务能力
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2、流程管理的组织设置与运作模式
3、流程管理工作的流程化与制度化
4、流程建设的考核与激励
5、流程审计运作机制——确保流程的有效执行
6、流程优化运作机制——确保流程的持续优化
7、流程管理IT平台导入与应用
《战略驱动的流程与组织变革》
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2 years, 8 months
[PATCH v3 0/6] vfio, dax: prevent long term filesystem-dax pins and other fixes
by Dan Williams
Changes since v2 [1]:
* Fix yet more compile breakage in the FS_DAX=n and DEV_DAX=y case.
(0day robot)
[1]: https://lists.01.org/pipermail/linux-nvdimm/2018-February/014046.html
---
The vfio interface, like RDMA, wants to setup long term (indefinite)
pins of the pages backing an address range so that a guest or userspace
driver can perform DMA to the with physical address. Given that this
pinning may lead to filesystem operations deadlocking in the
filesystem-dax case, the pinning request needs to be rejected.
The longer term fix for vfio, RDMA, and any other long term pin user, is
to provide a 'pin with lease' mechanism. Similar to the leases that are
hold for pNFS RDMA layouts, this userspace lease gives the kernel a way
to notify userspace that the block layout of the file is changing and
the kernel is revoking access to pinned pages.
---
Dan Williams (6):
dax: fix vma_is_fsdax() helper
dax: fix dax_mapping() definition in the FS_DAX=n + DEV_DAX=y case
xfs, dax: introduce IS_FSDAX()
dax: fix S_DAX definition
dax: short circuit vma_is_fsdax() in the CONFIG_FS_DAX=n case
vfio: disable filesystem-dax page pinning
drivers/vfio/vfio_iommu_type1.c | 18 +++++++++++++++---
fs/xfs/xfs_file.c | 14 +++++++-------
fs/xfs/xfs_ioctl.c | 4 ++--
fs/xfs/xfs_iomap.c | 6 +++---
fs/xfs/xfs_reflink.c | 2 +-
include/linux/dax.h | 9 ++++++---
include/linux/fs.h | 8 ++++++--
7 files changed, 40 insertions(+), 21 deletions(-)
2 years, 8 months
[PATCH v2 0/5] vfio, dax: prevent long term filesystem-dax pins and other fixes
by Dan Williams
Changes since v1 [1]:
* Fix the detection of device-dax file instances in vma_is_fsdax().
(Haozhong, Gerd)
* Fix compile breakage in the FS_DAX=n and DEV_DAX=y case. (0day robot)
[1]: https://lists.01.org/pipermail/linux-nvdimm/2018-February/014046.html
---
The vfio interface, like RDMA, wants to setup long term (indefinite)
pins of the pages backing an address range so that a guest or userspace
driver can perform DMA to the with physical address. Given that this
pinning may lead to filesystem operations deadlocking in the
filesystem-dax case, the pinning request needs to be rejected.
The longer term fix for vfio, RDMA, and any other long term pin user, is
to provide a 'pin with lease' mechanism. Similar to the leases that are
hold for pNFS RDMA layouts, this userspace lease gives the kernel a way
to notify userspace that the block layout of the file is changing and
the kernel is revoking access to pinned pages.
---
Dan Williams (5):
dax: fix vma_is_fsdax() helper
dax: fix dax_mapping() definition in the FS_DAX=n + DEV_DAX=y case
dax: fix S_DAX definition
dax: short circuit vma_is_fsdax() in the CONFIG_FS_DAX=n case
vfio: disable filesystem-dax page pinning
drivers/vfio/vfio_iommu_type1.c | 18 +++++++++++++++---
include/linux/dax.h | 9 ++++++---
include/linux/fs.h | 6 ++++--
3 files changed, 25 insertions(+), 8 deletions(-)
2 years, 8 months
