Re: [XenPPC] copy_page speedup using dcbz on target

[poff <poff@xxxxxxxxxxxxxx>]

> So do you have a patch for copy_page()?

In Xen for PPC, the only copy_page() is in arch/powerpc/mm.c:

extern void copy_page(void *dp, void *sp)
{
    if (on_systemsim()) {
        systemsim_memcpy(dp, sp, PAGE_SIZE);
    } else {
        memcpy(dp, sp, PAGE_SIZE);
    }
}


1) Also copy_page is not referenced in current Xen sources?

2) dcbz depends on cacheability and cache alignment.
   Should a newname be given to this version of copy_page()?

3) Useful when PPC must do page copies in place of 'page flipping'.

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