diff options
| author | George.Wilson <[email protected]> | 2013-04-29 15:49:23 -0700 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2013-05-01 17:05:52 -0700 |
| commit | cc92e9d0c3e67a7e66c844466f85696a087bf60a (patch) | |
| tree | 97f27cdfb4a662dee0de0d916e7c92cc0e03a605 /include/sys/zfs_context.h | |
| parent | 57f5a2008e2e6acf58934cf43c5fdca0faffa73e (diff) | |
3246 ZFS I/O deadman thread
Reviewed by: Matt Ahrens <[email protected]>
Reviewed by: Eric Schrock <[email protected]>
Reviewed by: Christopher Siden <[email protected]>
Approved by: Garrett D'Amore <[email protected]>
NOTES: This patch has been reworked from the original in the
following ways to accomidate Linux ZFS implementation
*) Usage of the cyclic interface was replaced by the delayed taskq
interface. This avoids the need to implement new compatibility
code and allows us to rely on the existing taskq implementation.
*) An extern for zfs_txg_synctime_ms was added to sys/dsl_pool.h
because declaring externs in source files as was done in the
original patch is just plain wrong.
*) Instead of panicing the system when the deadman triggers a
zevent describing the blocked vdev and the first pending I/O
is posted. If the panic behavior is desired Linux provides
other generic methods to panic the system when threads are
observed to hang.
*) For reference, to delay zios by 30 seconds for testing you can
use zinject as follows: 'zinject -d <vdev> -D30 <pool>'
References:
illumos/illumos-gate@283b84606b6fc326692c03273de1774e8c122f9a
https://www.illumos.org/issues/3246
Ported-by: Brian Behlendorf <[email protected]>
Closes #1396
Diffstat (limited to 'include/sys/zfs_context.h')
| -rw-r--r-- | include/sys/zfs_context.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/sys/zfs_context.h b/include/sys/zfs_context.h index 53080f382..a23bfdcf8 100644 --- a/include/sys/zfs_context.h +++ b/include/sys/zfs_context.h @@ -25,6 +25,7 @@ /* * Copyright 2011 Nexenta Systems, Inc. All rights reserved. * Copyright (c) 2012, Joyent, Inc. All rights reserved. + * Copyright (c) 2012 by Delphix. All rights reserved. */ #ifndef _SYS_ZFS_CONTEXT_H @@ -400,6 +401,8 @@ extern taskq_t *taskq_create(const char *, int, pri_t, int, int, uint_t); #define taskq_create_sysdc(a, b, d, e, p, dc, f) \ (taskq_create(a, b, maxclsyspri, d, e, f)) extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t); +extern taskqid_t taskq_dispatch_delay(taskq_t *, task_func_t, void *, uint_t, + clock_t); extern void taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t, taskq_ent_t *); extern int taskq_empty_ent(taskq_ent_t *); @@ -407,6 +410,7 @@ extern void taskq_init_ent(taskq_ent_t *); extern void taskq_destroy(taskq_t *); extern void taskq_wait(taskq_t *); extern int taskq_member(taskq_t *, kthread_t *); +extern int taskq_cancel_id(taskq_t *, taskqid_t); extern void system_taskq_init(void); extern void system_taskq_fini(void); @@ -523,6 +527,11 @@ extern vnode_t *rootdir; extern void delay(clock_t ticks); +#define SEC_TO_TICK(sec) ((sec) * hz) +#define MSEC_TO_TICK(msec) ((msec) / (MILLISEC / hz)) +#define USEC_TO_TICK(usec) ((usec) / (MICROSEC / hz)) +#define NSEC_TO_TICK(usec) ((usec) / (NANOSEC / hz)) + #define gethrestime_sec() time(NULL) #define gethrestime(t) \ do {\ |