not likely. solaris VM is like SVR4, right ?(or rather, the other
way round). their writes go through page cache. their buffer cache
is usually used only for filesystem metadata. so there's no reason
to do a copy. but they have other overheads like having to map the
page into kernel space before doing IO (unlike linux which maps all
physical mem, so this step is trivial).
I believe they have the same buffercache/pagecache issues we do.
If you look in the Solaris header files (/usr/include/sys/buf.h to be
exact) they have a page struct pointer in the buffer structure which
seems to support my theory. It's just a theory, I could be wrong.
Later,
David S. Miller
davem@redhat.com
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