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[XFS] Make sure the threads and shaker in xfs_buf are de-initialized in 

reverse startup order

SGI-PV: 942063
SGI-Modid: xfs-linux:xfs-kern:198651a

Signed-off-by: Christoph Hellwig <hch@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
This commit is contained in:
Christoph Hellwig 2005-11-02 10:15:05 +11:00 committed by Nathan Scott
parent df70b17f88
commit 04d8b28416
1 changed files with 25 additions and 62 deletions
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87
fs/xfs/linux-2.6/xfs_buf.c
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@ -1891,14 +1891,22 @@ xfs_flush_buftarg(
return pincount; return pincount;
} }
STATIC int int __init
xfs_buf_daemons_start(void) pagebuf_init(void)
{ {
int error = -ENOMEM; int error = -ENOMEM;
#ifdef PAGEBUF_TRACE
pagebuf_trace_buf = ktrace_alloc(PAGEBUF_TRACE_SIZE, KM_SLEEP);
#endif
pagebuf_zone = kmem_zone_init(sizeof(xfs_buf_t), "xfs_buf");
if (!pagebuf_zone)
goto out_free_trace_buf;
xfslogd_workqueue = create_workqueue("xfslogd"); xfslogd_workqueue = create_workqueue("xfslogd");
if (!xfslogd_workqueue) if (!xfslogd_workqueue)
goto out; goto out_free_buf_zone;
xfsdatad_workqueue = create_workqueue("xfsdatad"); xfsdatad_workqueue = create_workqueue("xfsdatad");
if (!xfsdatad_workqueue) if (!xfsdatad_workqueue)
@ -1909,82 +1917,37 @@ xfs_buf_daemons_start(void)
error = PTR_ERR(xfsbufd_task); error = PTR_ERR(xfsbufd_task);
goto out_destroy_xfsdatad_workqueue; goto out_destroy_xfsdatad_workqueue;
} }
pagebuf_shake = kmem_shake_register(xfsbufd_wakeup);
if (!pagebuf_shake)
goto out_stop_xfsbufd;
return 0; return 0;
out_stop_xfsbufd:
kthread_stop(xfsbufd_task);
out_destroy_xfsdatad_workqueue: out_destroy_xfsdatad_workqueue:
destroy_workqueue(xfsdatad_workqueue); destroy_workqueue(xfsdatad_workqueue);
out_destroy_xfslogd_workqueue: out_destroy_xfslogd_workqueue:
destroy_workqueue(xfslogd_workqueue); destroy_workqueue(xfslogd_workqueue);
out:
return error;
}
/*
* Note: do not mark as __exit, it is called from pagebuf_terminate.
*/
STATIC void
xfs_buf_daemons_stop(void)
{
kthread_stop(xfsbufd_task);
destroy_workqueue(xfslogd_workqueue);
destroy_workqueue(xfsdatad_workqueue);
}
/*
* Initialization and Termination
*/
int __init
pagebuf_init(void)
{
int error = -ENOMEM;
pagebuf_zone = kmem_zone_init(sizeof(xfs_buf_t), "xfs_buf");
if (!pagebuf_zone)
goto out;
#ifdef PAGEBUF_TRACE
pagebuf_trace_buf = ktrace_alloc(PAGEBUF_TRACE_SIZE, KM_SLEEP);
#endif
error = xfs_buf_daemons_start();
if (error)
goto out_free_buf_zone;
pagebuf_shake = kmem_shake_register(xfsbufd_wakeup);
if (!pagebuf_shake) {
error = -ENOMEM;
goto out_stop_daemons;
}
return 0;
out_stop_daemons:
xfs_buf_daemons_stop();
out_free_buf_zone: out_free_buf_zone:
kmem_zone_destroy(pagebuf_zone);
out_free_trace_buf:
#ifdef PAGEBUF_TRACE #ifdef PAGEBUF_TRACE
ktrace_free(pagebuf_trace_buf); ktrace_free(pagebuf_trace_buf);
#endif #endif
kmem_zone_destroy(pagebuf_zone);
out:
return error; return error;
} }
/*
* pagebuf_terminate.
*
* Note: do not mark as __exit, this is also called from the __init code.
*/
void void
pagebuf_terminate(void) pagebuf_terminate(void)
{ {
xfs_buf_daemons_stop(); kmem_shake_deregister(pagebuf_shake);
kthread_stop(xfsbufd_task);
destroy_workqueue(xfsdatad_workqueue);
destroy_workqueue(xfslogd_workqueue);
kmem_zone_destroy(pagebuf_zone);
#ifdef PAGEBUF_TRACE #ifdef PAGEBUF_TRACE
ktrace_free(pagebuf_trace_buf); ktrace_free(pagebuf_trace_buf);
#endif #endif
kmem_zone_destroy(pagebuf_zone);
kmem_shake_deregister(pagebuf_shake);
} }