Displaying 3 results from an estimated 3 matches for "devm_munmap_pag".
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devm_munmap_pages
2019 Aug 15
3
[PATCH 04/15] mm: remove the pgmap field from struct hmm_vma_walk
...use of information they get through the
> fault or snapshot function until checking for racing notifier
> under lock.
Hmm that first assumption is not guaranteed by the dev_pagemap core.
The dev_pagemap end of life model is "disable, invalidate, drain" so
it's possible to call devm_munmap_pages() while pages are still mapped
it just won't complete the teardown of the pagemap until the last
reference is dropped. New references are blocked during this teardown.
However, if the driver is validating the liveness of the mapping in
the mmu-notifier path and blocking new references it sou...
2019 Aug 15
0
[PATCH 04/15] mm: remove the pgmap field from struct hmm_vma_walk
...hrough the
> > fault or snapshot function until checking for racing notifier
> > under lock.
>
> Hmm that first assumption is not guaranteed by the dev_pagemap core.
> The dev_pagemap end of life model is "disable, invalidate, drain" so
> it's possible to call devm_munmap_pages() while pages are still mapped
> it just won't complete the teardown of the pagemap until the last
> reference is dropped. New references are blocked during this teardown.
>
> However, if the driver is validating the liveness of the mapping in
> the mmu-notifier path and block...
2019 Aug 15
2
[PATCH 04/15] mm: remove the pgmap field from struct hmm_vma_walk
On Thu, Aug 15, 2019 at 11:07 AM Jerome Glisse <jglisse at redhat.com> wrote:
>
> On Wed, Aug 14, 2019 at 07:48:28AM -0700, Dan Williams wrote:
> > On Wed, Aug 14, 2019 at 6:28 AM Jason Gunthorpe <jgg at mellanox.com> wrote:
> > >
> > > On Wed, Aug 14, 2019 at 09:38:54AM +0200, Christoph Hellwig wrote:
> > > > On Tue, Aug 13, 2019 at 06:36:33PM