---
> Changes since v1:
> - Enable HAVE_RCU_TABLE_FREE unconditionally to avoid different code pathes
> for no reason [Linus Torvalds]
Acked-by: Kirill A. Shutemov
--
Kirill A. Shutemov
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On Wed, Aug 23, 2017 at 04:03:53PM -0700, Linus Torvalds wrote:
> On Wed, Aug 23, 2017 at 3:36 PM, Kirill A. Shutemov
> wrote:
> >
> > Below is test cases that allocates a lot of page tables and measuare
> > fork/exit time. (I'm not entirely sure it's the b
On Wed, Aug 23, 2017 at 08:27:18PM +, Linus Torvalds wrote:
> On Wed, Aug 23, 2017 at 12:59 PM, Kirill A. Shutemov
> wrote:
> >
> > In this case we need performance numbers for !PARAVIRT kernel.
>
> Yes.
>
> > Numbers for tight loop of "mmap(MAP_POPULAT
s.
Numbers for tight loop of "mmap(MAP_POPULATE); munmap()" might be
interesting too for worst case scenario.
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sh |= (*func)(mm, virt_to_page(pmd), PT_PMD);
- xen_pmd_walk(mm, pmd, func, last && i == nr - 1, limit);
+ flush |= xen_pmd_walk(mm, pmd, func,
+ last && i == nr - 1, limit);
}
return flush;
}
@@ -650,7 +651,8 @@ static int xen_p4d_walk(struct mm_struct *mm, p4d_t *p4d,
pud = pud_offset(&p4d[i], 0);
if (PTRS_PER_PUD > 1)
flush |= (*func)(mm, virt_to_page(pud), PT_PUD);
- xen_pud_walk(mm, pud, func, last && i == nr - 1, limit);
+ flush |= xen_pud_walk(mm, pud, func,
+ last && i == nr - 1, limit);
}
return flush;
}
@@ -706,7 +708,7 @@ static int __xen_pgd_walk(struct mm_struct *mm, pgd_t *pgd,
p4d = p4d_offset(&pgd[i], 0);
if (PTRS_PER_P4D > 1)
flush |= (*func)(mm, virt_to_page(p4d), PT_P4D);
- xen_p4d_walk(mm, p4d, func, i == nr - 1, limit);
+ flush |= xen_p4d_walk(mm, p4d, func, i == nr - 1, limit);
}
/* Do the top level last, so that the callbacks can use it as
--
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fbe 100644
> --- a/arch/x86/xen/xen-pvh.S
> +++ b/arch/x86/xen/xen-pvh.S
> @@ -87,7 +87,7 @@ ENTRY(pvh_start_xen)
> wrmsr
>
> /* Enable pre-constructed page tables. */
> - mov $_pa(init_level4_pgt), %eax
> + mov $_pa(
On Fri, Feb 20, 2015 at 10:47:52AM +, Andrew Cooper wrote:
> On 20/02/15 01:49, Linus Torvalds wrote:
> > On Thu, Feb 19, 2015 at 5:05 PM, Kirill A. Shutemov
> > wrote:
> >> I'm feeling I miss very basic background on how Xen works, but why does it
> >>
Adjusting pte_protnone() and pmd_protnone() to check for the absence of
> _PAGE_PRESENT allows 64-bit Xen PV guests to work correctly again (see
> following patch), but I'm not sure if NUMA_BALANCING would correctly
> work with this change.
--
Kirill A. Shutemov
__
