Don Morris f17a590085 ufs: Avoid M_WAITOK allocations when building a dirhash ... At this point the directory's vnode lock is held, so blocking while waiting for free pages makes the system more susceptible to deadlock in low memory conditions. This is particularly problematic on NUMA systems as UMA currently implements a strict first-touch policy. ufsdirhash_build() already uses M_NOWAIT for other allocations and already handled failures for the block array allocation, so just convert to M_NOWAIT. PR: 253992 Reviewed by: markj, mckusick, vangyzen MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D29045		2021-05-20 11:25:45 -04:00
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ffs	Fix handling of embedded symbolic links (and history lesson).	2021-05-16 17:04:11 -07:00
ufs	ufs: Avoid M_WAITOK allocations when building a dirhash	2021-05-20 11:25:45 -04:00