https://bugzilla.novell.com/show_bug.cgi?id=823797
https://bugzilla.novell.com/show_bug.cgi?id=823797#c8
Andrew Holland changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEEDINFO |NEW
InfoProvider|andrew.holland@nordicteleco |
|m.fi |
--- Comment #8 from Andrew Holland 2013-06-25 03:21:50 UTC ---
Interestingly, discard_max_bytes does not exist for /sys/block/sdc:
mysql1:/home/andrew # cd /sys/block/sdc
mysql1:/sys/block/sdc # du
0 ./sdc1/power
0 ./sdc1/trace
0 ./sdc1/holders
0 ./sdc1
0 ./power
0 ./queue/iosched
0 ./queue
0 ./trace
0 ./slaves
0 ./holders
0 .
mysql1:/sys/block/sdc # cd queue
mysql1:/sys/block/sdc/queue # ls -la
total 0
drwxr-xr-x 3 root root 0 Jun 25 14:11 .
drwxr-xr-x 8 root root 0 Jun 13 14:56 ..
-rw-r--r-- 1 root root 4096 Jun 25 14:11 add_random
-r--r--r-- 1 root root 4096 Jun 25 14:11 discard_granularity
-r--r--r-- 1 root root 4096 Jun 25 14:11 discard_max_bytes
-r--r--r-- 1 root root 4096 Jun 25 14:11 discard_zeroes_data
-r--r--r-- 1 root root 4096 Jun 25 14:11 hw_sector_size
drwxr-xr-x 2 root root 0 Jun 25 14:11 iosched
-rw-r--r-- 1 root root 4096 Jun 25 14:11 iostats
-r--r--r-- 1 root root 4096 Jun 25 14:11 logical_block_size
-r--r--r-- 1 root root 4096 Jun 25 14:11 max_hw_sectors_kb
-r--r--r-- 1 root root 4096 Jun 25 14:11 max_integrity_segments
-rw-r--r-- 1 root root 4096 Jun 25 14:11 max_sectors_kb
-r--r--r-- 1 root root 4096 Jun 25 14:11 max_segment_size
-r--r--r-- 1 root root 4096 Jun 25 14:11 max_segments
-r--r--r-- 1 root root 4096 Jun 25 14:11 minimum_io_size
-rw-r--r-- 1 root root 4096 Jun 25 14:11 nomerges
-rw-r--r-- 1 root root 4096 Jun 25 14:11 nr_requests
-r--r--r-- 1 root root 4096 Jun 25 14:11 optimal_io_size
-r--r--r-- 1 root root 4096 Jun 25 14:11 physical_block_size
-rw-r--r-- 1 root root 4096 Jun 25 14:11 read_ahead_kb
-rw-r--r-- 1 root root 4096 Jun 25 14:11 rotational
-rw-r--r-- 1 root root 4096 Jun 25 14:11 rq_affinity
-rw-r--r-- 1 root root 4096 Jun 25 14:11 scheduler
-r--r--r-- 1 root root 4096 Jun 25 14:11 write_same_max_bytes
- so there is no "discard_max_bytes"
The remainder are:
sdc/queue/discard_max_bytes: 15728640
sdc/discard_alignment: 0
sdc1/discard_alignment: 14680064
sdc1/alignment_offset: 0
---
mysql1:/sys/block/sdc/queue # cat discard_granularity
15728640
mysql1:/sys/block/sdc/queue # cd ..
mysql1:/sys/block/sdc # cat discard_alignment
0
mysql1:/sys/block/sdc/sdc1 # cat discard_alignment
14680064
mysql1:/sys/block/sdc/sdc1 # cat alignment_offset
0
---
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