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For 32-bit machines rollback the default number of vnode pager pbufs

Description

For 32-bit machines rollback the default number of vnode pager pbufs
back to the lever before r343030. For 64-bit machines reduce it slightly,
too. Together with r343030 I bumped the limit up to the value we use at
Netflix to serve 100 Gbit/s of sendfile traffic, and it probably isn't a
good default.

Provide a loader tunable to change vnode pager pbufs count. Document it.

Details

Committed
glebiusFeb 15 2019, 11:36 PM
Parents
rS344187: FUSE: Refresh cached file size when it changes (lookup)
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