From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <006a01c2e1da$e108ddd0$020120b0@jockeXP> From: "Joakim Tjernlund" To: "Dan Malek" Cc: , References: <005401c2e0e4$27a1b6b0$020120b0@jockeXP> <3E63C6BE.6020002@embeddededge.com> Subject: Re: Improved copy_page() function, about 30% speed up for mpc860! Date: Tue, 4 Mar 2003 00:16:10 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: > Joakim Tjernlund wrote: > > > I found a link that may have relevance regarding the dcbz problem , can anybody confirm this? > > http://www.uwsg.iu.edu/hypermail/linux/kernel/0012.0/0529.html > > This is just one of the many different things that happen with various > silicon versions and the use of the cache instructions on the 8xx. > In this particular case, we have fixed this "bug" because it affects > other load/store instructions under some conditions (i.e. this isn't > unique to the cache instructions). OK so this is not it then, but what is it then? Are you 100% that the bug(whatever this may be) is present for mpc860, rev D4 or later? How can I make it bite me on kernel space memory? I can't find that info in the archives, if it's there please give me a hint. I have enabled all kernel functions that uses dcbz for 8xx as well. I even split copy_tofrom_user into copy_from_myuser resp. copy_to_myuser and enabled dcbz in copy_from_myuser and still everything is working just fine. Jocke ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/