Re: LFENCE instruction (was: [rfc][patch 3/3] x86: optimise barriers)

2007-10-16 Thread Herbert Xu
Nick Piggin <[EMAIL PROTECTED]> wrote: > > Also, for non-wb memory. I don't think the Intel document referenced > says anything about this, but the AMD document says that loads can pass > loads (page 8, rule b). > > This is why our rmb() is still an lfence. BTW, Xen (in particular, the code in dr

Re: [PATCH 12/12] xfs: eagerly remove vmap mappings to avoid upsetting Xen

2007-10-16 Thread David Chinner
On Mon, Oct 15, 2007 at 01:48:52PM -0700, Jeremy Fitzhardinge wrote: > XFS leaves stray mappings around when it vmaps memory to make it > virtually contigious. This upsets Xen if one of those pages is being > recycled into a pagetable, since it finds an extra writable mapping of > the page. > > T

Re: [PATCH 04/12] Clean up duplicate includes in arch/i386/xen/

2007-10-16 Thread Jesper Juhl
On 15/10/2007, Jeremy Fitzhardinge <[EMAIL PROTECTED]> wrote: > This patch cleans up duplicate includes in > arch/i386/xen/ > Just for the record; this patch is From: Jesper Juhl <[EMAIL PROTECTED]> > Signed-off-by: Jesper Juhl <[EMAIL PROTECTED]> > Signed-off-by: Jeremy Fitzhardinge <[EM