summaryrefslogtreecommitdiff
path: root/blktrace.c
diff options
context:
space:
mode:
authorEdward Shishkin <edward@redhat.com>2009-12-15 18:48:12 +0100
committerJens Axboe <jens.axboe@oracle.com>2010-04-20 09:51:52 +0200
commita8d834fbba5310cfc745aeff463e65ae200eaa8b (patch)
tree3c23a47586c05ee868d1e1c8f3afa106c7067b5c /blktrace.c
parente41bf0ffcf5a2ec016493c25737896a03bfbafba (diff)
downloadblktrace-a8d834fbba5310cfc745aeff463e65ae200eaa8b.tar.gz
blktrace-a8d834fbba5310cfc745aeff463e65ae200eaa8b.tar.bz2
blktrace: update blkiomon doc
Fixup for 499398. Description of problem: blkiomon does not understand the output of blktrace when working with logical volume device (it is quiet, while working with physical device it prints IO statistics as expected). BUG (or design feature?): /dev/dm-* and /dev/md* don't see BLK_TC_COMPLETE actions: /* we need an older D trace and a younger C trace */ if (t_old->bit.action & BLK_TC_ACT(BLK_TC_ISSUE) && t_young->bit.action & BLK_TC_ACT(BLK_TC_COMPLETE)) { /* matching D and C traces - update statistics */ match++; blkiomon_account(&t_old->bit, &t_young->bit); blkiomon_free_trace(t_stored); return t; } Possible solution: Update documentation. Signed-off-by: Edward Shishkin <edward@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'blktrace.c')
0 files changed, 0 insertions, 0 deletions