kcm: do not sense pfmemalloc status in kcm_sendpage()

edumazet · kuba-moo · commit ee15e1f38dc2 · 2022-10-27T11:25:13.000-07:00
Similar to changes done in TCP in blamed commit. We should not sense pfmemalloc status in sendpage() methods. Fixes: 3261400 ("tcp: TX zerocopy should not sense pfmemalloc status") Signed-off-by: Eric Dumazet <edumazet@google.com> Link: https://lore.kernel.org/r/20221027040637.1107703-1-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
diff --git a/net/kcm/kcmsock.c b/net/kcm/kcmsock.c
@@ -839,7 +839,7 @@ static ssize_t kcm_sendpage(struct socket *sock, struct page *page,
 	}
 
 	get_page(page);
-	skb_fill_page_desc(skb, i, page, offset, size);
+	skb_fill_page_desc_noacc(skb, i, page, offset, size);
 	skb_shinfo(skb)->flags |= SKBFL_SHARED_FRAG;
 
 coalesced:

Original file line number	Diff line number	Diff line change
`@@ -839,7 +839,7 @@ static ssize_t kcm_sendpage(struct socket sock, struct page page,`
`839`	`839`	`}`
`840`	`840`
`841`	`841`	`get_page(page);`
`842`		`- skb_fill_page_desc(skb, i, page, offset, size);`
	`842`	`+ skb_fill_page_desc_noacc(skb, i, page, offset, size);`
`843`	`843`	`skb_shinfo(skb)->flags \|= SKBFL_SHARED_FRAG;`
`844`	`844`
`845`	`845`	`coalesced:`