From owner-svn-src-all@FreeBSD.ORG Sun Oct 26 23:25:44 2014 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id DF4199D6; Sun, 26 Oct 2014 23:25:43 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id CB9BB400; Sun, 26 Oct 2014 23:25:43 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.9/8.14.9) with ESMTP id s9QNPh3D089179; Sun, 26 Oct 2014 23:25:43 GMT (envelope-from mav@FreeBSD.org) Received: (from mav@localhost) by svn.freebsd.org (8.14.9/8.14.9/Submit) id s9QNPhae089172; Sun, 26 Oct 2014 23:25:43 GMT (envelope-from mav@FreeBSD.org) Message-Id: <201410262325.s9QNPhae089172@svn.freebsd.org> X-Authentication-Warning: svn.freebsd.org: mav set sender to mav@FreeBSD.org using -f From: Alexander Motin Date: Sun, 26 Oct 2014 23:25:43 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r273711 - head/sys/cam/ctl X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 26 Oct 2014 23:25:44 -0000 Author: mav Date: Sun Oct 26 23:25:42 2014 New Revision: 273711 URL: https://svnweb.freebsd.org/changeset/base/273711 Log: Allocate buffer for READ BUFFER/WRITE BUFFER commands on demand. These commands are rare, but consume additional 256KB RAM per LUN. MFC after: 1 week Modified: head/sys/cam/ctl/ctl.c head/sys/cam/ctl/ctl_private.h Modified: head/sys/cam/ctl/ctl.c ============================================================================== --- head/sys/cam/ctl/ctl.c Sun Oct 26 21:17:44 2014 (r273710) +++ head/sys/cam/ctl/ctl.c Sun Oct 26 23:25:42 2014 (r273711) @@ -4735,6 +4735,7 @@ ctl_free_lun(struct ctl_lun *lun) ctl_tpc_lun_shutdown(lun); mtx_destroy(&lun->lun_lock); free(lun->lun_devid, M_CTL); + free(lun->write_buffer, M_CTL); if (lun->flags & CTL_LUN_MALLOCED) free(lun, M_CTL); @@ -5726,7 +5727,7 @@ ctl_read_buffer(struct ctl_scsiio *ctsio len = scsi_3btoul(cdb->length); buffer_offset = scsi_3btoul(cdb->offset); - if (buffer_offset + len > sizeof(lun->write_buffer)) { + if (buffer_offset + len > CTL_WRITE_BUFFER_SIZE) { ctl_set_invalid_field(ctsio, /*sks_valid*/ 1, /*command*/ 1, @@ -5739,14 +5740,19 @@ ctl_read_buffer(struct ctl_scsiio *ctsio if ((cdb->byte2 & RWB_MODE) == RWB_MODE_DESCR) { descr[0] = 0; - scsi_ulto3b(sizeof(lun->write_buffer), &descr[1]); + scsi_ulto3b(CTL_WRITE_BUFFER_SIZE, &descr[1]); ctsio->kern_data_ptr = descr; len = min(len, sizeof(descr)); } else if ((cdb->byte2 & RWB_MODE) == RWB_MODE_ECHO_DESCR) { ctsio->kern_data_ptr = echo_descr; len = min(len, sizeof(echo_descr)); - } else + } else { + if (lun->write_buffer == NULL) { + lun->write_buffer = malloc(CTL_WRITE_BUFFER_SIZE, + M_CTL, M_WAITOK); + } ctsio->kern_data_ptr = lun->write_buffer + buffer_offset; + } ctsio->kern_data_len = len; ctsio->kern_total_len = len; ctsio->kern_data_resid = 0; @@ -5784,7 +5790,7 @@ ctl_write_buffer(struct ctl_scsiio *ctsi len = scsi_3btoul(cdb->length); buffer_offset = scsi_3btoul(cdb->offset); - if (buffer_offset + len > sizeof(lun->write_buffer)) { + if (buffer_offset + len > CTL_WRITE_BUFFER_SIZE) { ctl_set_invalid_field(ctsio, /*sks_valid*/ 1, /*command*/ 1, @@ -5800,6 +5806,10 @@ ctl_write_buffer(struct ctl_scsiio *ctsi * malloc it and tell the caller the data buffer is here. */ if ((ctsio->io_hdr.flags & CTL_FLAG_ALLOCATED) == 0) { + if (lun->write_buffer == NULL) { + lun->write_buffer = malloc(CTL_WRITE_BUFFER_SIZE, + M_CTL, M_WAITOK); + } ctsio->kern_data_ptr = lun->write_buffer + buffer_offset; ctsio->kern_data_len = len; ctsio->kern_total_len = len; Modified: head/sys/cam/ctl/ctl_private.h ============================================================================== --- head/sys/cam/ctl/ctl_private.h Sun Oct 26 21:17:44 2014 (r273710) +++ head/sys/cam/ctl/ctl_private.h Sun Oct 26 23:25:42 2014 (r273711) @@ -384,6 +384,8 @@ struct ctl_devid { */ #define NUM_TARGET_PORT_GROUPS 2 +#define CTL_WRITE_BUFFER_SIZE 262144 + struct tpc_list; struct ctl_lun { struct mtx lun_lock; @@ -417,7 +419,7 @@ struct ctl_lun { int pr_key_count; uint32_t pr_res_idx; uint8_t res_type; - uint8_t write_buffer[262144]; + uint8_t *write_buffer; struct ctl_devid *lun_devid; TAILQ_HEAD(tpc_lists, tpc_list) tpc_lists; };