Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751929AbdHENj5 (ORCPT ); Sat, 5 Aug 2017 09:39:57 -0400 Received: from verein.lst.de ([213.95.11.211]:34396 "EHLO newverein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751241AbdHENjz (ORCPT ); Sat, 5 Aug 2017 09:39:55 -0400 Date: Sat, 5 Aug 2017 15:39:54 +0200 From: Christoph Hellwig To: "Richard W.M. Jones" Cc: Christoph Hellwig , linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, "Martin K. Petersen" , pbonzini@redhat.com Subject: Re: Increased memory usage with scsi-mq Message-ID: <20170805133954.GA17694@lst.de> References: <20170804210035.GA10017@redhat.com> <20170805084436.GA14264@lst.de> <20170805092704.GD20914@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170805092704.GD20914@redhat.com> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1203 Lines: 33 For now can you apply this testing patch to the guest kernel? diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c index 9be211d68b15..0cbe2c882e1c 100644 --- a/drivers/scsi/virtio_scsi.c +++ b/drivers/scsi/virtio_scsi.c @@ -818,7 +818,7 @@ static struct scsi_host_template virtscsi_host_template_single = { .eh_timed_out = virtscsi_eh_timed_out, .slave_alloc = virtscsi_device_alloc, - .can_queue = 1024, + .can_queue = 64, .dma_boundary = UINT_MAX, .use_clustering = ENABLE_CLUSTERING, .target_alloc = virtscsi_target_alloc, @@ -839,7 +839,7 @@ static struct scsi_host_template virtscsi_host_template_multi = { .eh_timed_out = virtscsi_eh_timed_out, .slave_alloc = virtscsi_device_alloc, - .can_queue = 1024, + .can_queue = 64, .dma_boundary = UINT_MAX, .use_clustering = ENABLE_CLUSTERING, .target_alloc = virtscsi_target_alloc, @@ -983,7 +983,7 @@ static int virtscsi_probe(struct virtio_device *vdev) shost->max_id = num_targets; shost->max_channel = 0; shost->max_cmd_len = VIRTIO_SCSI_CDB_SIZE; - shost->nr_hw_queues = num_queues; + shost->nr_hw_queues = 1; #ifdef CONFIG_BLK_DEV_INTEGRITY if (virtio_has_feature(vdev, VIRTIO_SCSI_F_T10_PI)) {