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Re: kern/55268: tmpfs is slow

The following reply was made to PR kern/55268; it has been noted by GNATS.

From: Andrew Doran <>
Subject: Re: kern/55268: tmpfs is slow
Date: Fri, 15 May 2020 22:53:29 +0000

 It's a little better now but there is still a major problem with lock
 contention and context switch storms during fault processing because of a
 mix of reader/writer holds on the uobject locks.
 I guess it's something to do with tmpfs pages always being marked
 UVM_PAGE_STATUS_UNKNOWN unless committed to swap and that affecting the
 fault type.

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