Any rough idea of performance or memory savings (even in something
artificial like dbench run)?
It's more of a memory savings thing. When I mount with -o noserverino
and run fsstress on the mount, I'd regularly see the size of the
cifs_inode_cache hit 60M or more (on a client with 1G RAM). With this
patch in place, it rarely goes over 2M in size.
Eventually, memory pressure will force the size to go down, but if we
know that they'll never be used again (which is the case with
noserverino), it's better to go ahead and just free them.
I take it this overrides the behavior of the vfs_cache_pressure before
the memory pressure makes reclaiming cache necessary?
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