Displaying 3 results from an estimated 3 matches for "immeidately".
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2007 Apr 17
3
yum and wildcard problems
I am having trouble using wildcards ("*") with yum in Centos 5. Listing
or installing packages using them just immeidately fails with a "No match"
error, and I'm not sure why. Here is an example. Any comments? I'd love
to fix this.
[root at granta ~]# ps -e | grep yum
2706 ? 00:00:22 yum-updatesd
[root at granta ~]# yum list | grep kern
kernel.x86_64 2.6.18-8.1.1...
2020 Jul 31
1
[PATCH v4 6/6] mm/migrate: remove range invalidation in migrate_vma_pages()
...igrate_vma_setup()
> step and a pte_none() or zero page can't be modified so the only invalidation needed
> is the CPU TLB(s) for clearing the special zero page PTE entry.
No, the secondary MMU was invalidated but the invalidation start/end
range was exited. That means a secondary MMU is immeidately able to
reload the zero page into its MMU cache.
When this code replaces the PTE that has a zero page it also has to
invalidate again so that secondary MMU's are guaranteed to pick up the
new PTE value.
So, I still don't understand how this is safe?
Jason
2020 Jul 28
2
[PATCH v4 6/6] mm/migrate: remove range invalidation in migrate_vma_pages()
On Thu, Jul 23, 2020 at 03:30:04PM -0700, Ralph Campbell wrote:
> When migrating the special zero page, migrate_vma_pages() calls
> mmu_notifier_invalidate_range_start() before replacing the zero page
> PFN in the CPU page tables. This is unnecessary since the range was
> invalidated in migrate_vma_setup() and the page table entry is checked
> to be sure it hasn't changed