Differences

This shows you the differences between two versions of the page.

--- start [2020/06/11 20:00]
Ira Weiny [Filesystems]
+++ start [2020/06/12 15:58]
Ira Weiny [Filesystems]
@@ Line 455: / Line 455: @@
 </code>
-Where **[dax_mount_options]** depends on the kernel support you have and the desired behavior.  **For kernel version less than 5.8 the legacy '-o dax' option must be used.**  In 5.8 new mount options were introduced.  See [[fs_mount_options|fs_mount_options]] for details.
+Where **[dax_mount_options]** depends on the kernel support you have and the desired behavior.  See [[fs_mount_options|fs_mount_options]] for details.
 Check the kernel log to ensure the DAX mount option was honored; mount does not print this information. Example failures:
@@ Line 483: / Line 483: @@
 ==== iostats ====
 ----
-iostats are disabled by default due to performance overhead (e.g., 12M IOPS dropping 25% to 9M IOPS). However, they can be enabled in sysfs if desired.
+iostats are disabled by default due to performance overhead (e.g., 12M IOPS dropping 25% to 9M IOP
+S). However, they can be enabled in sysfs if desired.
 As of kernel 4.5, iostats are only collected for the base pmem device, not per-partition. Also, I/Os that go through DAX paths (rw_page, rw_bytes, and direct_access functions) are not counted, so nothing is collected for:

Persistent Memory Wiki