080b310015
4756 metaslab_group_preload() could deadlock Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Christopher Siden <christopher.siden@delphix.com> Reviewed by: Dan McDonald <danmcd@omniti.com> Reviewed by: Saso Kiselkov <saso.kiselkov@nexenta.com> Approved by: Garrett D'Amore <garrett@damore.org> The metaslab_group_preload() function grabs the mg_lock and then later tries to grab the metaslab lock. This lock ordering may lead to a deadlock since other consumers of the mg_lock will grab the metaslab lock first. References: https://www.illumos.org/issues/4756 https://github.com/illumos/illumos-gate/commit/30beaff Ported-by: Prakash Surya <surya1@llnl.gov> Signed-off-by: Prakash Surya <surya1@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #2488 |
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