[Bug 198920] [PATCH] www/squid: src/ipc/mem/Segment.cc patch to prevent memory pages flushing

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=198920

--- Comment #3 from emz at norma.perm.ru ---
MAP_NOSYNC is FreeBSD-specific, Linux syscall simply doesn't have this flag.
I used the "regression" term because without this flag PostgreSQL was terribly
slow. On the other hand, squid isn't a database engine, it has lesser i/o
density, but I though - if it still does use the mmap() call - why not.

I didn't ask any of the squid developers, but I think I can ask Amos Jeffries,
one of the main squid developers.

But the main idea was "MAP_NOSYNC definitely cannot slow down squid, in fact,
it's supposed to boost it up, so why not".

I will update this bug with whatever Amos will reply.

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