[Bug 236472] [FUSE] fuse(4) ignores the max_readahead parameter

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236472

            Bug ID: 236472
           Summary: [FUSE] fuse(4) ignores the max_readahead parameter
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: asomers at FreeBSD.org

A FUSE filesystem can request a max_readahead value from the kernel.  The
kernel isn't supposed to readahead by more than that many bytes.  In
particular, if max_readahead==0, then the kernel is supposed to completely
disable readahead.  But fuse(4) currently ignores this value.

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