[Bug 209571] ZFS and NVMe performing poorly. TRIM requests stall I/O activity
bugzilla-noreply at freebsd.org
bugzilla-noreply at freebsd.org
Tue Nov 28 22:31:44 UTC 2017
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209571
Warner Losh <imp at FreeBSD.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |imp at FreeBSD.org
--- Comment #4 from Warner Losh <imp at FreeBSD.org> ---
nvd and nda have the opposite problem that da/ada have. ada/da collapse as many
BIO_DELETE commands down into a single TRIM to the device. That's why limiting
helps since huge trims take a long time.
nvd/nda, however, has the opposite problem. They do no trim collapsing at all,
so flood the device with TRIM requests that starve read/write requests.
--
You are receiving this mail because:
You are the assignee for the bug.
More information about the freebsd-fs
mailing list