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2cb992a99c
When we have some LWBs closed and their ZIOs ready to be issued, we can not afford sleeping on config lock if somebody else try to lock it as writer, or it will cause a deadlock. To solve it, move spa_config_enter() from zil_lwb_write_issue() to zil_lwb_write_close() under zl_issuer_lock to enforce lock ordering with other threads. Now if we can't immediately lock config, issue all previously closed LWBs so that they could drop their config locks after completion, and only then allow sleeping on our lock. Reviewed-by: Mark Maybee <mark.maybee@delphix.com> Reviewed-by: Prakash Surya <prakash.surya@delphix.com> Reviewed-by: George Wilson <george.wilson@delphix.com> Signed-off-by: Alexander Motin <mav@FreeBSD.org> Sponsored by: iXsystems, Inc. Closes #15078 Closes #15080 |
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