| Message ID | 20240530142417.146696-4-ofir.gal@volumez.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v2,1/4] net: introduce helper sendpages_ok() | expand |
Am 30.05.24 um 16:24 schrieb Ofir Gal: > Currently _drbd_send_page() use sendpage_ok() in order to enable > MSG_SPLICE_PAGES, it check the first page of the iterator, the iterator > may represent contiguous pages. > > MSG_SPLICE_PAGES enables skb_splice_from_iter() which checks all the > pages it sends with sendpage_ok(). > > When _drbd_send_page() sends an iterator that the first page is > sendable, but one of the other pages isn't skb_splice_from_iter() warns > and aborts the data transfer. > > Using the new helper sendpages_ok() in order to enable MSG_SPLICE_PAGES > solves the issue. > > Signed-off-by: Ofir Gal <ofir.gal@volumez.com> > --- > drivers/block/drbd/drbd_main.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c > index 113b441d4d36..a5dbbf6cce23 100644 > --- a/drivers/block/drbd/drbd_main.c > +++ b/drivers/block/drbd/drbd_main.c > @@ -1550,7 +1550,7 @@ static int _drbd_send_page(struct drbd_peer_device *peer_device, struct page *pa > * put_page(); and would cause either a VM_BUG directly, or > * __page_cache_release a page that would actually still be referenced > * by someone, leading to some obscure delayed Oops somewhere else. */ > - if (!drbd_disable_sendpage && sendpage_ok(page)) > + if (!drbd_disable_sendpage && sendpages_ok(page, len, offset)) > msg.msg_flags |= MSG_NOSIGNAL | MSG_SPLICE_PAGES; > > drbd_update_congested(peer_device->connection); Acked-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com>
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index 113b441d4d36..a5dbbf6cce23 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -1550,7 +1550,7 @@ static int _drbd_send_page(struct drbd_peer_device *peer_device, struct page *pa * put_page(); and would cause either a VM_BUG directly, or * __page_cache_release a page that would actually still be referenced * by someone, leading to some obscure delayed Oops somewhere else. */ - if (!drbd_disable_sendpage && sendpage_ok(page)) + if (!drbd_disable_sendpage && sendpages_ok(page, len, offset)) msg.msg_flags |= MSG_NOSIGNAL | MSG_SPLICE_PAGES; drbd_update_congested(peer_device->connection);
Currently _drbd_send_page() use sendpage_ok() in order to enable MSG_SPLICE_PAGES, it check the first page of the iterator, the iterator may represent contiguous pages. MSG_SPLICE_PAGES enables skb_splice_from_iter() which checks all the pages it sends with sendpage_ok(). When _drbd_send_page() sends an iterator that the first page is sendable, but one of the other pages isn't skb_splice_from_iter() warns and aborts the data transfer. Using the new helper sendpages_ok() in order to enable MSG_SPLICE_PAGES solves the issue. Signed-off-by: Ofir Gal <ofir.gal@volumez.com> --- drivers/block/drbd/drbd_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)