Bug #11608
add DKIOC ioctl to report drive UNMAP support
Start date:
Due date:
% Done:
100%
Estimated time:
Difficulty:
Medium
Tags:
Gerrit CR:
Description
We added SCSI UNMAP support with bug 1700, but there is currently no way for upstack code to detect if a drive supports UNMAP. Having this capability would be useful for the ZoL port of the ZFS TRIM code (bug 6363). I'm going to implement a new DKIOC ioctl which would report the SD_THIN_PROV_ENABLED status from un_thin_flags.
Updated by Jerry Jelinek over 1 year ago
To test this, I ran a simple program which issues the ioctl and reports the results. I ran it against a regular disk (which reports no trim support) and an SSD (which reports trim support).
Updated by Electric Monk over 1 year ago
- Status changed from New to Closed
- % Done changed from 0 to 100
git commit efe44a0312f417787c2d6992582ad06b1b98cd8d
commit efe44a0312f417787c2d6992582ad06b1b98cd8d
Author: Jerry Jelinek <jerry.jelinek@joyent.com>
Date: 2019-08-27T13:58:24.000Z
11608 add DKIOC ioctl to report drive UNMAP support
Reviewed by: Igor Kozhukhov <igor@dilos.org>
Reviewed by: Toomas Soome <tsoome@me.com>
Reviewed by: Kody Kantor <kody.kantor@joyent.com>
Approved by: Dan McDonald <danmcd@joyent.com>