> If we have a purely Linux-specific hack to ensure cache coherency,
> that will still corrupt the cache on those *NIX clients that use
> ordinary cache coherency checking (i.e. checking mtime + file size)
> rather than cache invalidation.
Its what Solaris implements and what SunOS back down to 3.x implements. I
wouldnt be suprised if others do likewise ?
> It also avoids a lot of unnecessary cache flushing. Imagine having to
> reread your entire mailbox every time you open the file whether or not
> a new message has arrived. Ugh...
Interesting point.
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