Hi,
I'd like to participate in LSF/MM and would like to present/discuss
ideas for introducing I/O scheduling support to blk-mq.
Motiviation for this is to be able use scsi-mq even on systems that
have slow (spinning) devices attached to the SCSI stack.
I think the presentation/discussion should
On Wed, Feb 10, 2016 at 08:47:15PM +0100, Markus Trippelsdorf wrote:
> On 2016.02.10 at 20:34 +0100, Andreas Herrmann wrote:
> > On Tue, Feb 09, 2016 at 06:41:56PM +0100, Markus Trippelsdorf wrote:
> > > > Recently Johannes sent a patch to enable scsi-mq per driver, see
> &
On Tue, Feb 09, 2016 at 06:41:56PM +0100, Markus Trippelsdorf wrote:
> On 2016.02.09 at 18:12 +0100, Andreas Herrmann wrote:
> > [CC-ing linux-block and linux-scsi and adding some comments]
> >
> > On Mon, Feb 01, 2016 at 11:43:40PM +0100, Andreas Herrmann wrote:
> &
[CC-ing linux-block and linux-scsi and adding some comments]
On Mon, Feb 01, 2016 at 11:43:40PM +0100, Andreas Herrmann wrote:
> This introduces a new blk_mq hw attribute time_slice_us which allows
> to specify a time slice in usecs.
>
> Default value is 0 and implies no modificati
On Fri, Apr 06, 2007 at 03:30:52AM +0200, mahesh wrote:
> Where can I find documents for Linux SCSI mid layer
How about
Documentation/scsi/scsi_mid_low_api.txt
Documentation/scsi/scsi_eh.txt
and Documentation/scsi in general as a start?
Regards,
Andreas
--
AMD Saxony, Dresden, Germany
O
On Thu, Feb 08, 2007 at 03:40:03PM +0100, Heiko Carstens wrote:
> On Wed, Feb 07, 2007 at 05:06:43PM +0100, Andreas Herrmann wrote:
> > On Wed, Feb 07, 2007 at 01:17:57PM +0100, Swen Schillig wrote:
> > > From: Swen Schillig <[EMAIL PROTECTED]>
> > >
> >
On Wed, Feb 07, 2007 at 01:17:57PM +0100, Swen Schillig wrote:
> From: Swen Schillig <[EMAIL PROTECTED]>
>
> Invalid locking order. Kernel hangs after trying to take two locks
> which are dependend on each other. Introducing temporary variable
> to free requests. Free lock after requests are copie
On Sat, Sep 03, 2005 at 14:53:00, Christoph Hellwig wrote:
> Please don't do this. We have proper midlayer handling (plus FC
> transport
> class wrappers) to handle that case without introducing a big mess in
> the
> driver. Please take a look at fc_remote_port_{block,unblock}
Thanks for t
James,
I wished I would have put patch 1/7 at the end of the patch series ;-(
Because if patch 1 is not applied the other patches won't apply without
rejects.
I am on vacation for 1 week and I am not able to recreate the patches
before 12th of September.
Do you see any problems to bring the new
On Sat, 2005-09-03 13:45:01, James Bottomley wrote:
> But that's not what the patch does. It short circuits the error
> handler
> globally, not just in the cable pulled case.
> For any error induced timeout, you're going to follow this logic. In
> particular, if the device itself actua
On 03.09.2005 14:56 Arjan van de Ven <[EMAIL PROTECTED]> wrote:
> > zfcp: introduce eh_timed_out handler
> >
> > This handler is required to avoid offlined SCSI devices in a
multipath
> > setup if scsi commands time out on cable pulls lasting longer than
30
> > seconds.
> hmm why i
eature.
Signed-off-by: Andreas Herrmann <[EMAIL PROTECTED]>
zfcp_dbf.c | 11 +
zfcp_def.h | 13 +-
zfcp_erp.c | 95 +-
zfcp_ext.h |3
zfcp_fsf.c | 330 +--
zfcp: shorten eh_bus_reset and eh_host_reset handlers
Signed-off-by: Andreas Herrmann <[EMAIL PROTECTED]>
diff -Nup linux-2.6.13/drivers/s390/scsi-orig/zfcp_scsi.c
linux-2.6.13/drivers/s390/scsi/zfcp_scsi.c
--- linux-2.6.13/drivers/s390/scsi-orig/zfcp_scsi.c 2005-09-03
12:21:58.000
zfcp: remove function zfcp_fsf_req_wait_and_cleanup
Signed-off-by: Andreas Herrmann <[EMAIL PROTECTED]>
zfcp_ext.h |1 -
zfcp_fsf.c | 46 --
zfcp_scsi.c | 21 +
3 files changed, 9 insertions(+), 59 deletions(-)
dif
before all fsf_requests of that unit are completely processed.)
Signed-off-by: Andreas Herrmann <[EMAIL PROTECTED]>
zfcp_aux.c |8 +---
zfcp_def.h | 69 +---
zfcp_fsf.c | 101 +---
zfcp_
zfcp: fix race conditions when accessing erp_action lists
o always use locking when changing erp_action lists,
o avoid escalation to ERP_ACTION_REOPEN_PORT_FORCED if erp_action is
still in use for ERP_ACTION_REOPEN_PORT
Signed-off-by: Andreas Herrmann <[EMAIL PROTECTED]>
diff -Nup
zfcp: introduce eh_timed_out handler
This handler is required to avoid offlined SCSI devices in a multipath
setup if scsi commands time out on cable pulls lasting longer than 30
seconds.
Signed-off-by: Andreas Herrmann <[EMAIL PROTECTED]>
diff -Nup linux-2.6.13/drivers/s390/scs
Hi,
Following a series of 7 patches (based on 2.6.13) to update the zfcp
device driver. Patches contain bugfixes, some cleanups and new
features. Overall diffstat of all patches is:
Makefile |2
zfcp_aux.c | 188 -
zfcp_dbf.c | 999 +
On 29.08.2005 13:03 Christoph Hellwig <[EMAIL PROTECTED]> wrote:
> > Won't work for all zSeries FC host adapters because they are
> > virtualized and you can have several virtual adapters using the same
> > WWPN/WWNN. Using LUN masking and zoning it is not possible to
> > configure the SA
On 29.08.2005 10:48 Christoph Hellwig <[EMAIL PROTECTED]> worte:
> Never use scsi_add_device with the fc_transport code.
fc_remote_port_add
> will do a proper lun scan if the added rport is a scsi target.
Won't work for all zSeries FC host adapters because they are
virtualized and you can ha
Hi,
What is the correct sequence to register and deregister host/rport/scsi_devices
at the scsi stack?
ZFCP's sequence is like follows:
scsi_add_host
fc_remote_port_add (if port succesfully configured/opened in/by zfcp)
scsi_add_device (if unit successfully configured/opened in/by zfcp)
If a zf
On 27.08.2005 19:38 James Bottomley <[EMAIL PROTECTED]> wrote:
> > this patch fixes a severe problem with 2.6.13-rc7.
> >
> > Due to recent SCSI changes it is not possible to add any
> > LUNs to the zfcp device driver anymore. With registration
> > of remote ports this is fixed.
> >
then please integrate it
in 2.6.13.1
Thanks a lot.
Regards,
Andreas
Signed-off-by: Andreas Herrmann <[EMAIL PROTECTED]>
diffstat:
zfcp_aux.c | 29 +++--
zfcp_ccw.c | 10 ++
zfcp_def.h |2 +-
zfcp_erp.c | 25 ++---
zfcp
Simon Derr <[EMAIL PROTECTED]> wrote:
> It is sufficient to have a few HBAs and to insmod/rmmod the driver a
few
> times.
> Since the host_no is choosen with a mere counter increment
> in scsi_host_alloc():
> shost->host_no = scsi_host_next_hn++; /* XXX(hch): still rac
Lars Marowsky-Bree <[EMAIL PROTECTED]>
21.04.2005 21:54
> On 2005-04-21T09:42:05, Patrick Mansfield <[EMAIL PROTECTED]> wrote:
> > On Tue, Apr 19, 2005 at 07:19:53PM +0200, Andreas Herrmann wrote:
> >
> > We need a patch like Mike
rc3) will fix the problem.
Sorry, for any inconvenience.
Regards,
Andreas
zfcp: fix compile error
Signed-off-by: Andreas Herrmann <[EMAIL PROTECTED]>
diff -bBrauN linux-2.6.x/drivers/s390/scsi-orig/zfcp_aux.c
linux-2.6.x/drivers/s390/scsi/zfcp_aux.c
--- linux-2.6.x/drivers/s390/scsi-orig/zfcp_a
??? <[EMAIL PROTECTED]> wrote:
20.04.2005 03:17
> what multipath are you using? Software, or hardware,
> or both?
We are using udm with evms (Linux on zSeries).
Hardware setup is:
- switched fabric FC-SAN,
- 4 paths to each FC-LUN on the ESS 800
All 4 paths are "failing fast" du
Hi,
I have question(s) regarding the fastfail operation of the SCSI stack.
Performing multipath-tests with an IBM ESS I encountered problems.
During certain operations on an ESS (quiesce/resume and such) requests
on all paths fail temporarily with an data underrun (resid is set in
the FCP-respons
Hi,
Am I right in the assumption that scsi_cmnd->resid is just of use for
requests initiated by sg?
How does the SCSI-stack handle normal (non-sg) requests for SCSI disks
for which a scsi_cmnd->resid is set? AFAIK, resid is ignored by
sd. So, such requests are returned to the block layer althoug
Douglas Gilbert <[EMAIL PROTECTED]> wrote:
> underflow- LLD should place (DID_ERROR << 16) in 'result' if
> actual number of bytes transferred is less than this
> figure. Not many LLDs implement this check and some
> that do just
Hi,
Documentation/scsi/scsi_mid_low_api.txt says:
resid- an LLD should set this signed integer to the ...
underflow- LLD should place (DID_ERROR << 16) in 'result' if ...
ZFCP is setting resid and DID_ERROR if an underrun is indicated in the
FCP-response.
In som
Hi,
This patch mainly introduces support for point-2-point
topology.
Regards,
Andreas
From: Heiko Carstens <[EMAIL PROTECTED]>
From: Maxim Shchetynin <[EMAIL PROTECTED]>
From: Andreas Herrmann <[EMAIL PROTECTED]>
zfcp changes:
- add support for point-2-point topology
- c
Hi,
Patch converts zfcp to use compat_ioctl.
Thanks to Cristoph who reminded me to adapt zfcp.
Regards,
Andreas
zfcp changes: convert zfcp to compat_ioctl
Signed-off-by: Andreas Herrmann <[EMAIL PROTECTED]>
= zfcp_aux.c 1.19 vs edited =
--- 1.19/drivers/s390/scsi/zfcp_aux.c
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