Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759048Ab0HET34 (ORCPT ); Thu, 5 Aug 2010 15:29:56 -0400 Received: from mail1.microsoft.com ([131.107.115.212]:18155 "EHLO smtp.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932107Ab0HET3r convert rfc822-to-8bit (ORCPT ); Thu, 5 Aug 2010 15:29:47 -0400 From: Hank Janssen To: "'linux-kernel@vger.kernel.org'" , "'devel@driverdev.osuosl.org'" , "'virtualization@lists.osdl.org'" CC: "'gregkh@suse.de'" , Haiyang Zhang Subject: [PATCH 1/5] staging: hv: Fixed bounce kmap problem by using correct index Thread-Topic: [PATCH 1/5] staging: hv: Fixed bounce kmap problem by using correct index Thread-Index: Acs00pgoD64hHMxYTeeK8EUNasjiLg== Date: Thu, 5 Aug 2010 19:29:44 +0000 Message-ID: <8AFC7968D54FB448A30D8F38F259C56223FEC87F@TK5EX14MBXC114.redmond.corp.microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [157.54.123.12] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1606 Lines: 45 From: Hank Janssen Fixed bounce offset kmap problem by using correct index. The symptom of the problem is that in some NAS appliances this problem represents Itself by a unresponsive VM under a load with many clients writing small files. Signed-off-by:Hank Janssen Signed-off-by:Haiyang Zhang Cc: stable --- drivers/staging/hv/storvsc_drv.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/hv/storvsc_drv.c b/drivers/staging/hv/storvsc_drv.c index 075b61b..3b9ccb0 100644 --- a/drivers/staging/hv/storvsc_drv.c +++ b/drivers/staging/hv/storvsc_drv.c @@ -495,7 +495,7 @@ static unsigned int copy_to_bounce_buffer(struct scatterlist *orig_sgl, /* ASSERT(orig_sgl[i].offset + orig_sgl[i].length <= PAGE_SIZE); */ - if (j == 0) + if (bounce_addr == 0) bounce_addr = (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), KM_IRQ0); while (srclen) { @@ -556,7 +556,7 @@ static unsigned int copy_from_bounce_buffer(struct scatterlist *orig_sgl, destlen = orig_sgl[i].length; /* ASSERT(orig_sgl[i].offset + orig_sgl[i].length <= PAGE_SIZE); */ - if (j == 0) + if (bounce_addr == 0) bounce_addr = (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), KM_IRQ0); while (destlen) { -- 1.6.0.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/