kib a7c71037df Add the "nocache" nullfs mount option, which disables the caching of ... the free nullfs vnodes, switching nullfs behaviour to pre-r240285. The option is mostly intended as the last-resort when higher pressure on the vnode cache due to doubling of the vnode counts is not desirable. Note that disabling the cache costs more than 2x wall time in the metadata-hungry scenarious. The default is "cache". Tested and benchmarked by: pho (previous version) MFC after: 2 weeks		2013-01-03 19:17:57 +00:00
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null_subr.c	Add the "nocache" nullfs mount option, which disables the caching of	2013-01-03 19:17:57 +00:00
null_vfsops.c	Add the "nocache" nullfs mount option, which disables the caching of	2013-01-03 19:17:57 +00:00
null_vnops.c	Add the "nocache" nullfs mount option, which disables the caching of	2013-01-03 19:17:57 +00:00
null.h	Add the "nocache" nullfs mount option, which disables the caching of	2013-01-03 19:17:57 +00:00