Brian Behlendorf 3b36f8319d Add dbgmsg kstat ... Internally ZFS keeps a small log to facilitate debugging. By default the log is disabled, to enable it set zfs_dbgmsg_enable=1. The contents of the log can be accessed by reading the /proc/spl/kstat/zfs/dbgmsg file. Writing 0 to this proc file clears the log. $ echo 1 >/sys/module/zfs/parameters/zfs_dbgmsg_enable $ echo 0 >/proc/spl/kstat/zfs/dbgmsg $ zpool import tank $ cat /proc/spl/kstat/zfs/dbgmsg 1 0 0x01 -1 0 2492357525542 2525836565501 timestamp message 1441141408 spa=tank async request task=1 1441141408 txg 70 open pool version 5000; software version 5000/5; ... 1441141409 spa=tank async request task=32 1441141409 txg 72 import pool version 5000; software version 5000/5; ... 1441141414 command: lt-zpool import tank Note the zfs_dbgmsg() and dprintf() functions are both now mapped to the same log. As mentioned above the kernel debug log can be accessed though the /proc/spl/kstat/zfs/dbgmsg kstat. For user space consumers log messages are immediately written to stdout after applying the ZFS_DEBUG environment variable. $ ZFS_DEBUG=on ./cmd/ztest/ztest -V Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Ned Bass <bass6@llnl.gov> Closes #3728		2015-09-04 16:08:14 -07:00
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Makefile.am	Initial attempt to document events and payloads.	2014-07-25 11:58:36 -07:00
vdev_id.conf.5	Add extra keyword 'slot' to vdev_id.conf	2015-08-30 10:03:56 -07:00
zfs-events.5	man: fix spelling mistakes in manual	2015-07-01 10:58:31 -07:00
zfs-module-parameters.5	Add dbgmsg kstat	2015-09-04 16:08:14 -07:00
zpool-features.5	Illumos 5027 - zfs large block support	2015-05-11 12:23:16 -07:00