Brian Behlendorf 34e143323e Fix z_wr_iss_h zio_execute() import hang ... Because we need to be more frugal about our stack usage under Linux. The __zio_execute() function was modified to re-dispatch zios to a ZIO_TASKQ_ISSUE thread when we're in a context which is known to be stack heavy. Those two contexts are the sync thread and what ever thread is performing spa initialization. Unfortunately, this change introduced an unlikely bug which can result in a zio being re-dispatched indefinitely and never being executed. If during spa initialization we handle a zio with ZIO_PRIORITY_NOW it will be moved to the high priority queue. When __zio_execute() is called again for the zio it will mis- interpret the context and re-dispatch it again. The system will get stuck spinning re-dispatching the zio and making no forward progress. To fix this rare issue __zio_execute() has been updated not to re-dispatch zios on either the ZIO_TASKQ_ISSUE or ZIO_TASKQ_ISSUE_HIGH task queues. In practice this issue was rarely reported and can usually be fixed by rebooting the system and importing the pool again. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #1455		2013-08-15 15:20:36 -07:00
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avl	Add script for builtin module building.	2012-07-26 13:45:09 -07:00
nvpair	Register correct handlers in nvlist_alloc()	2013-06-20 09:58:15 -07:00
unicode	Add script for builtin module building.	2012-07-26 13:45:09 -07:00
zcommon	Add snapdev=[hidden|visible] dataset property	2013-03-05 12:37:54 -08:00
zfs	Fix z_wr_iss_h zio_execute() import hang	2013-08-15 15:20:36 -07:00
zpios	Refresh links to web site	2013-03-06 15:46:41 -08:00
.gitignore	gitignore: anchor entries at their respective directory	2013-04-02 10:50:17 -07:00
Makefile.in	Add KMODDIR to install target	2013-03-06 15:46:40 -08:00