Re: [RFC] [PATCH] cache pollution aware __copy_from_user_ll()

linux
2005-08-15T12:16:11Z

Actually, is there any place *other* than write() to the page cache that
warrants a non-temporal store? Network sockets with scatter/gather and
hardware checksum, maybe?

This is pretty much synonomous with what is allowed to go into high
memory, no?

While we're on the subject, for the copy_from_user source, prefetchnta is
probably indicated. If user space hasn't caused it to be cached already
(admittedly, the common case), we *know* the kernel isn't going to look
at that data again.