Displaying 9 results from an estimated 9 matches for "iov_iter_get_pages_use_gup".
2019 Jul 24
20
[PATCH 00/12] block/bio, fs: convert put_page() to put_user_page*()
...stand alone.
Testing: not much beyond build and boot testing has been done yet. And
I'm not set up to even exercise all of it (especially the IB parts) at
run time.
Anyway, changes here are:
* Store, in the iov_iter, a "came from gup (get_user_pages)" parameter.
Then, use the new iov_iter_get_pages_use_gup() to retrieve it when
it is time to release the pages. That allows choosing between put_page()
and put_user_page*().
* Pass in one more piece of information to bio_release_pages: a "from_gup"
parameter. Similar use as above.
* Change the block layer, and several file systems, to u...
2019 Jul 24
20
[PATCH 00/12] block/bio, fs: convert put_page() to put_user_page*()
...stand alone.
Testing: not much beyond build and boot testing has been done yet. And
I'm not set up to even exercise all of it (especially the IB parts) at
run time.
Anyway, changes here are:
* Store, in the iov_iter, a "came from gup (get_user_pages)" parameter.
Then, use the new iov_iter_get_pages_use_gup() to retrieve it when
it is time to release the pages. That allows choosing between put_page()
and put_user_page*().
* Pass in one more piece of information to bio_release_pages: a "from_gup"
parameter. Similar use as above.
* Change the block layer, and several file systems, to u...
2019 Aug 05
2
[PATCH 00/12] block/bio, fs: convert put_page() to put_user_page*()
On 7/23/19 11:17 PM, Christoph Hellwig wrote:
> On Tue, Jul 23, 2019 at 09:25:06PM -0700, john.hubbard at gmail.com wrote:
>> * Store, in the iov_iter, a "came from gup (get_user_pages)" parameter.
>> Then, use the new iov_iter_get_pages_use_gup() to retrieve it when
>> it is time to release the pages. That allows choosing between put_page()
>> and put_user_page*().
>>
>> * Pass in one more piece of information to bio_release_pages: a "from_gup"
>> parameter. Similar use as above.
>>
>...
2019 Aug 05
2
[PATCH 00/12] block/bio, fs: convert put_page() to put_user_page*()
On 7/23/19 11:17 PM, Christoph Hellwig wrote:
> On Tue, Jul 23, 2019 at 09:25:06PM -0700, john.hubbard at gmail.com wrote:
>> * Store, in the iov_iter, a "came from gup (get_user_pages)" parameter.
>> Then, use the new iov_iter_get_pages_use_gup() to retrieve it when
>> it is time to release the pages. That allows choosing between put_page()
>> and put_user_page*().
>>
>> * Pass in one more piece of information to bio_release_pages: a "from_gup"
>> parameter. Similar use as above.
>>
>...
2019 Jul 24
0
[PATCH 00/12] block/bio, fs: convert put_page() to put_user_page*()
On Tue, Jul 23, 2019 at 09:25:06PM -0700, john.hubbard at gmail.com wrote:
> * Store, in the iov_iter, a "came from gup (get_user_pages)" parameter.
> Then, use the new iov_iter_get_pages_use_gup() to retrieve it when
> it is time to release the pages. That allows choosing between put_page()
> and put_user_page*().
>
> * Pass in one more piece of information to bio_release_pages: a "from_gup"
> parameter. Similar use as above.
>
> * Change the block la...
2019 Aug 07
0
[PATCH 00/12] block/bio, fs: convert put_page() to put_user_page*()
...4:35PM -0700, John Hubbard wrote:
> On 7/23/19 11:17 PM, Christoph Hellwig wrote:
> > On Tue, Jul 23, 2019 at 09:25:06PM -0700, john.hubbard at gmail.com wrote:
> >> * Store, in the iov_iter, a "came from gup (get_user_pages)" parameter.
> >> Then, use the new iov_iter_get_pages_use_gup() to retrieve it when
> >> it is time to release the pages. That allows choosing between put_page()
> >> and put_user_page*().
> >>
> >> * Pass in one more piece of information to bio_release_pages: a "from_gup"
> >> parameter. Similar us...
2019 Jul 24
0
[PATCH 07/12] vhost-scsi: convert put_page() to put_user_page*()
...host_scsi_cmd *cmd,
size_t offset;
unsigned int npages = 0;
+ /*
+ * Here in all cases we should have an IOVEC which use GUP. If that is
+ * not the case then we will wrongly call put_user_page() and the page
+ * refcount will go wrong (this is in vhost_scsi_release_cmd())
+ */
+ WARN_ON(!iov_iter_get_pages_use_gup(iter));
+
bytes = iov_iter_get_pages(iter, pages, LONG_MAX,
VHOST_SCSI_PREALLOC_UPAGES, &offset);
/* No pages were pinned */
@@ -681,7 +688,7 @@ vhost_scsi_iov_to_sgl(struct vhost_scsi_cmd *cmd, bool write,
while (p < sg) {
struct page *page = sg_page(p++);
if (page)
-...
2019 Jul 24
0
[PATCH 07/12] vhost-scsi: convert put_page() to put_user_page*()
...; unsigned int npages = 0;
>
> + /*
> + * Here in all cases we should have an IOVEC which use GUP. If that is
> + * not the case then we will wrongly call put_user_page() and the page
> + * refcount will go wrong (this is in vhost_scsi_release_cmd())
> + */
> + WARN_ON(!iov_iter_get_pages_use_gup(iter));
> +
> bytes = iov_iter_get_pages(iter, pages, LONG_MAX,
> VHOST_SCSI_PREALLOC_UPAGES, &offset);
> /* No pages were pinned */
> @@ -681,7 +688,7 @@ vhost_scsi_iov_to_sgl(struct vhost_scsi_cmd *cmd, bool write,
> while (p < sg) {
> struct page *pa...
2019 Jul 25
0
[PATCH 00/12] block/bio, fs: convert put_page() to put_user_page*()
...ond build and boot testing has been done yet. And
> I'm not set up to even exercise all of it (especially the IB parts) at
> run time.
>
> Anyway, changes here are:
>
> * Store, in the iov_iter, a "came from gup (get_user_pages)" parameter.
> Then, use the new iov_iter_get_pages_use_gup() to retrieve it when
> it is time to release the pages. That allows choosing between put_page()
> and put_user_page*().
>
> * Pass in one more piece of information to bio_release_pages: a "from_gup"
> parameter. Similar use as above.
>
> * Change the block la...