From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg KH Subject: Re: [PATCH 2/5] staging: hv: Fixed lockup problem with bounce_buffer scatter list Date: Mon, 30 Aug 2010 16:49:02 -0700 Message-ID: <20100830234902.GA22941@kroah.com> References: <8AFC7968D54FB448A30D8F38F259C56223FEC88B@TK5EX14MBXC114.redmond.corp.microsoft.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <8AFC7968D54FB448A30D8F38F259C56223FEC88B@TK5EX14MBXC114.redmond.corp.microsoft.com> Sender: linux-kernel-owner@vger.kernel.org To: Hank Janssen Cc: "'linux-kernel@vger.kernel.org'" , "'devel@driverdev.osuosl.org'" , "'virtualization@lists.osdl.org'" , Haiyang Zhang , "'gregkh@suse.de'" List-Id: virtualization@lists.linuxfoundation.org On Thu, Aug 05, 2010 at 07:29:53PM +0000, Hank Janssen wrote: > From: Hank Janssen > > Fixed lockup problem with bounce_buffer scatter list which caused > crashes in heavy loads. Under heavy loads with many clients we this > problem appear, it causes a kernel Panic. > > Signed-off-by:Hank Janssen > Signed-off-by:Haiyang Zhang > Cc: stable > --- > drivers/staging/hv/storvsc_drv.c | 9 ++++++--- > 1 files changed, 6 insertions(+), 3 deletions(-) > > diff --git a/drivers/staging/hv/storvsc_drv.c b/drivers/staging/hv/storvsc_drv.c > index 3b9ccb0..169d701 100644 > --- a/drivers/staging/hv/storvsc_drv.c > +++ b/drivers/staging/hv/storvsc_drv.c > @@ -615,6 +615,7 @@ static int storvsc_queuecommand(struct scsi_cmnd *scmnd, > unsigned int request_size = 0; > int i; > struct scatterlist *sgl; > + unsigned int sg_count = 0; > > DPRINT_DBG(STORVSC_DRV, "scmnd %p dir %d, use_sg %d buf %p len %d " > "queue depth %d tagged %d", scmnd, scmnd->sc_data_direction, @@ -697,6 +698,7 @@ static int storvsc_queuecommand(struct scsi_cmnd *scmnd, > request->DataBuffer.Length = scsi_bufflen(scmnd); This patch is corrupted. It applies, but doesn't do what you want it to do :( Care to resend? thanks, greg k-h