In iscsci driver, iscsi_tcp_segment_map() uses the following code to check whether the page should or not be handled by sendpage: if (!recv && page_count(sg_page(sg)) >= 1 && !PageSlab(sg_page(sg)))
The "page_count(sg_page(sg)) >= 1 && !PageSlab(sg_page(sg)" part is to make sure the page can be sent to network layer's zero copy path. This part is exactly what sendpage_ok() does. This patch uses use sendpage_ok() in iscsi_tcp_segment_map() to replace the original open coded checks. Signed-off-by: Coly Li <col...@suse.de> Reviewed-by: Lee Duncan <ldun...@suse.com> Acked-by: Martin K. Petersen <martin.peter...@oracle.com> Cc: Vasily Averin <v...@virtuozzo.com> Cc: Cong Wang <amw...@redhat.com> Cc: Mike Christie <micha...@cs.wisc.edu> Cc: Chris Leech <cle...@redhat.com> Cc: Christoph Hellwig <h...@lst.de> Cc: Hannes Reinecke <h...@suse.de> --- drivers/scsi/libiscsi_tcp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/libiscsi_tcp.c b/drivers/scsi/libiscsi_tcp.c index 37e5d4e48c2f..83f14b2c8804 100644 --- a/drivers/scsi/libiscsi_tcp.c +++ b/drivers/scsi/libiscsi_tcp.c @@ -128,7 +128,7 @@ static void iscsi_tcp_segment_map(struct iscsi_segment *segment, int recv) * coalescing neighboring slab objects into a single frag which * triggers one of hardened usercopy checks. */ - if (!recv && page_count(sg_page(sg)) >= 1 && !PageSlab(sg_page(sg))) + if (!recv && sendpage_ok(sg_page(sg))) return; if (recv) { -- 2.26.2