Bug 36722
| Summary: | TRIM support is broken for Crucial M4 drives | ||
|---|---|---|---|
| Product: | File System | Reporter: | devsk (funtoos) |
| Component: | ext4 | Assignee: | fs_ext4 (fs_ext4) |
| Status: | RESOLVED DOCUMENTED | ||
| Severity: | normal | CC: | alan, mkp |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 2.6.38.8 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
| Attachments: |
dmesg output
BLKDISCARD testing program |
||
Created attachment 60892 [details]
BLKDISCARD testing program
Hi,
thanks for reporting! Could you please provide the output of this simple test program ? Also the output of the following command.
grep $ /sys/block/sda/queue/discard_*
What kernel version are you using ?
Thanks!
-Lukas
I am on 2.6.38.8 $ grep $ /sys/block/sdk/queue/discard_* /sys/block/sdk/queue/discard_granularity:0 /sys/block/sdk/queue/discard_max_bytes:0 /sys/block/sdk/queue/discard_zeroes_data:0 # /tmp/discard /dev/sdk5 discard: Operation not supported Is this because of the LSI card not passing the TRIM onto the drive? Why does hdparm report that TRIM is supported then? hdparm asks the drive directly whereas the LSI card must be able to translate from SCSI to ATA commands. None the LSI cards I have support that functionality yet. You can try sending us the output of: # sg_readcap -l /dev/sdk # sg_vpd -p thpv /dev/sdk -- Martin K. Petersen Oracle Linux Engineering |
Created attachment 60842 [details] dmesg output The TRIM is disabled as per the following messages: # dmesg | grep "discard not" [ 18.614000] EXT4-fs warning (device sdi8): release_blocks_on_commit:2674: discard not supported, disabling [42486.763000] EXT4-fs warning (device sdi11): release_blocks_on_commit:2674: discard not supported, disabling but TRIM support is there: # hdparm -I /dev/sdi | grep TRIM * Data Set Management TRIM supported (limit 8 blocks) * Deterministic read data after TRIM The drive is on this controller and not part of any RAID: # lspci | grep LSI 04:00.0 Serial Attached SCSI controller: LSI Logic / Symbios Logic SAS2008 PCI-Express Fusion-MPT SAS-2 [Falcon] (rev 03) The dmesg is attached. Can someone also say what this message means: [42087.056000] EXT4-fs (sdi11): Unaligned AIO/DIO on inode 654340 by VirtualBox; performance will be poor.