kib 153d3ae3ae Fix livelock in ufsdirhash_create(). ... When more than one thread enters ufsdirhash_create() for the same directory and the inode dirhash is instantiated, but the dirhash' hash is not, all of them lock the dirhash shared and then try to upgrade. Since there are several threads owning the lock shared, upgrade fails and the same attempt is repeated, ad infinitum. To break the lockstep, lock the dirhash in exclusive mode after the failed try-upgrade. Reported and tested by: pho Sponsored by: Mellanox Technologies MFC after: 1 week		2017-12-07 09:05:34 +00:00
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ffs	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
ufs	Fix livelock in ufsdirhash_create().	2017-12-07 09:05:34 +00:00