Hello Ted,
Based on your commit message 0ae45f63d4e, I I wrote the documentation
below for MS_LAZYTIME, to go into the mount(2) man page. Could you
please check it over and let me know if it's accurate. In particular,
I added pieces marked with "*" below that were not part of the commit
message and I'd like confirmation that they're accurate.
Thanks,
Michael
[[
MS_LAZYTIME (since Linux 3.20)
Only update filetimes (atime, mtime, ctime) on the in-
memory version of the file inode. The on-disk time‐
stamps are updated only when:
(a) the inode needs to be updated for some change unre‐
lated to file timestamps;
(b) the application employs fsync(2), syncfs(2), or
sync(2);
(c) an undeleted inode is evicted from memory; or
* (d) more than 24 hours have passed since the i-node was
* written to disk.
This mount option significantly reduces writes to the
inode table for workloads that perform frequent random
writes to preallocated files.
* As at Linux 3.20, this option is supported only on ext4.
]]
--
Michael Kerrisk Linux man-pages maintainer;
http://www.kernel.org/doc/man-pages/
Author of "The Linux Programming Interface", http://blog.man7.org/
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