On Tue, Feb 19, 2008 at 07:46:10PM +1100, Nick Piggin wrote:
On Sunday 17 February 2008 06:22, Christoph Lameter wrote:
On Fri, 15 Feb 2008, Andrew Morton wrote:
flush_cache_page(vma, address, pte_pfn(*pte));
entry = ptep_clear_flush(vma, address, pte);
On Saturday 16 February 2008 14:37, Andrew Morton wrote:
On Thu, 14 Feb 2008 22:49:02 -0800 Christoph Lameter [EMAIL PROTECTED]
wrote:
Two callbacks to remove individual pages as done in rmap code
invalidate_page()
Called from the inner loop of rmap walks to invalidate pages.
On Fri, Feb 15, 2008 at 07:37:36PM -0800, Andrew Morton wrote:
The | is obviously deliberate. But no explanation is provided telling us
why we still call the callback if ptep_clear_flush_young() said the page
was recently referenced. People who read your code will want to understand
this.
On Fri, 15 Feb 2008, Andrew Morton wrote:
@@ -287,7 +288,8 @@ static int page_referenced_one(struct pa
if (vma-vm_flags VM_LOCKED) {
referenced++;
*mapcount = 1; /* break early from loop */
- } else if (ptep_clear_flush_young(vma, address, pte))
+ }
On Thu, 14 Feb 2008 22:49:02 -0800 Christoph Lameter [EMAIL PROTECTED] wrote:
Two callbacks to remove individual pages as done in rmap code
invalidate_page()
Called from the inner loop of rmap walks to invalidate pages.
age_page()
Called for the determination of the page
Two callbacks to remove individual pages as done in rmap code
invalidate_page()
Called from the inner loop of rmap walks to invalidate pages.
age_page()
Called for the determination of the page referenced status.
If we do not care about page referenced status then an age_page
Two callbacks to remove individual pages as done in rmap code
invalidate_page()
Called from the inner loop of rmap walks to invalidate pages.
age_page()
Called for the determination of the page referenced status.
If we do not care about page referenced status then an age_page
This is the second part of a patch posted to patch 1/6.
Index: git-linus/mm/rmap.c
===
--- git-linus.orig/mm/rmap.c2008-01-30 11:55:56.0 -0600
+++ git-linus/mm/rmap.c 2008-01-30 12:01:28.0 -0600
@@ -476,8 +476,10
I don't understand how this is intended to work. I think the page flag
needs to be maintained by the mmu_notifier subsystem.
Let's assume we have a mapping that has a grant from xpmem and an
additional grant from kvm. The exporters are not important, the fact
that there may be two is.
Assume
Callbacks to remove individual pages if the subsystem has an
rmap capability. The pagelock is held but no spinlocks are held.
The refcount of the page is elevated so that dropping the refcount
in the subsystem will not directly free the page.
The callbacks occur after the Linux rmaps have been
Callbacks to remove individual pages if the subsystem has an
rmap capability. The pagelock is held but no spinlocks are held.
The refcount of the page is elevated so that dropping the refcount
in the subsystem will not directly free the page.
The callbacks occur after the Linux rmaps have been
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