https://github.com/torvalds/linux
Revision a75e9ccabd925d16954739bd977c54695c9310d0 authored by Srinivas Eeda on 31 January 2012, 05:51:22 UTC, committed by Joel Becker on 04 July 2012, 06:27:15 UTC
When ocfs2dc thread holds dc_task_lock spinlock and receives soft IRQ it deadlock itself trying to get same spinlock in ocfs2_wake_downconvert_thread. Below is the stack snippet. The patch disables interrupts when acquiring dc_task_lock spinlock. ocfs2_wake_downconvert_thread ocfs2_rw_unlock ocfs2_dio_end_io dio_complete ..... bio_endio req_bio_endio .... scsi_io_completion blk_done_softirq __do_softirq do_softirq irq_exit do_IRQ ocfs2_downconvert_thread [kthread] Signed-off-by: Srinivas Eeda <srinivas.eeda@oracle.com> Signed-off-by: Joel Becker <jlbec@evilplan.org>
1 parent 16865b7
Tip revision: a75e9ccabd925d16954739bd977c54695c9310d0 authored by Srinivas Eeda on 31 January 2012, 05:51:22 UTC
ocfs2: use spinlock irqsave for downconvert lock.patch
ocfs2: use spinlock irqsave for downconvert lock.patch
Tip revision: a75e9cc
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