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authorMark Johnston <markj@freebsd.org>2020-06-30 15:35:29 -0400
committerBrian Behlendorf <behlendorf1@llnl.gov>2020-07-06 11:53:31 -0700
commit6e0056171234b84450af2afbb6594bd3b09422b5 (patch)
tree89ea4c7e98ddc130bc23004ad944c54ba78a3bc2 /cmd
parenta4b0a74c7f346cab0a9ae3f8f55bd1a372e14336 (diff)
Add a "try" operation for range locks
zfs_rangelock_tryenter() bails immediately instead of waiting for the lock to become available. This will be used to resolve a deadlock in the FreeBSD page-in code. No functional change intended. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Ryan Moeller <ryan@ixsystems.com> Signed-off-by: Mark Johnston <markj@FreeBSD.org> Closes #10519
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