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Commit 10328c44 authored by Steve French's avatar Steve French
Browse files

smb3: only offload decryption of read responses if multiple requests 



No point in offloading read decryption if no other requests on the
wire

Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
Signed-off-by: default avatarRonnie Sahlberg <lsahlber@redhat.com>
parent 496902dc

fs/cifs/cifsfs.c

+6 −3
Original line number Diff line number Diff line
@@ -1503,11 +1503,14 @@ init_cifs(void) 
	}



	/*

	 * BB Consider setting limit!=0 maybe to min(num_of_cores - 1, 3) so we

	 * don't launch too many worker threads

	 * Consider in future setting limit!=0 maybe to min(num_of_cores - 1, 3)

	 * so that we don't launch too many worker threads but

	 * Documentation/workqueue.txt recommends setting it to 0

	 */



	/* WQ_UNBOUND allows decrypt tasks to run on any CPU */

	decrypt_wq = alloc_workqueue("smb3decryptd",

				     WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);

				     WQ_UNBOUND|WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);

	if (!decrypt_wq) {

		rc = -ENOMEM;

		goto out_destroy_cifsiod_wq;

fs/cifs/smb2ops.c

+1 −1
Original line number Diff line number Diff line
@@ -4121,7 +4121,7 @@ receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid, 
	 * use more cores decrypting which can be expensive

	 */



	if ((server->min_offload) &&

	if ((server->min_offload) && (server->in_flight > 1) &&

	    (server->pdu_size >= server->min_offload)) {

		dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);

		if (dw == NULL)