linux-stable.git/drivers/block/cciss.c, branch linux-2.6.26.y

cciss: read config to obtain max outstanding commands per controller

2008-07-04T17:40:09+00:00

This patch changes the way we determine the maximum number of outstanding
commands for each controller.

Most Smart Array controllers can support up to 1024 commands, the notable
exceptions are the E200 and E200i.

The next generation of controllers which were just added support a mode of
operation called Zero Memory Raid (ZMR).  In this mode they only support
64 outstanding commands.  In Full Function Raid (FFR) mode they support
1024.

We have been setting the queue depth by arbitrarily assigning some value
for each controller.  We needed a better way to set the queue depth to
avoid lots of annoying "fifo full" messages.  So we made the driver a
little smarter.  We now read the config table and subtract 4 from the
returned value.  The -4 is to allow some room for ioctl calls which are
not tracked the same way as io commands are tracked.

Please consider this for inclusion.

Signed-off-by: Mike Miller 
Cc: Jens Axboe 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cciss: fix regression that no device nodes are created if no logical drives are configured.

2008-07-04T17:40:06+00:00

Fix regression in cciss driver that if no logical drives are configured,
no device nodes at all get created.

Signed-off-by: Stephen M. Cameron 
Acked-by: Mike Miller 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cciss: add new hardware support

2008-06-13T01:05:40+00:00

Add support for the next generation of HP Smart Array SAS/SATA
controllers.  Shipping date is late Fall 2008.

Bump the driver version to 3.6.20 to reflect the new hardware support from
patch 1 of this set.

Signed-off-by: Mike Miller 
Cc: Jens Axboe 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cciss: assign PDE->data before gluing PDE into /proc tree

2008-05-01T15:04:02+00:00

Simply replace proc_create and further data assigned with proc_create_data.

Signed-off-by: Denis V. Lunev 
Cc: Alexey Dobriyan 
Cc: Eric W. Biederman 
Acked-by: Mike Miller 
Cc: Greg Kroah-Hartman 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

proc: remove proc_root_driver

2008-04-29T15:06:18+00:00

Use creation by full path: "driver/foo".

Signed-off-by: Alexey Dobriyan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cciss: Fix race between disk-adding code and interrupt handler

2008-04-21T07:50:09+00:00

Fix race condition between cciss_init_one(), cciss_update_drive_info(),
and cciss_check_queues().

Signed-off-by: Stephen M. Cameron 
Signed-off-by: Jens Axboe

cciss: error: implicit declaration of function 'sg_init_table'

2008-04-11T15:06:44+00:00

This patch adds the missing include directive  to the
cciss.c source file.    This was discovered by our release team when building
the kernel for the Alpha architecture.

Errors were found as references to functions 'sg_init_table' and 'sg_page' do
not exist without the include for Alpha.

Signed-off-by: Mike Pagano 
Cc: Jens Axboe 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cciss: remove READ_AHEAD define and use block layer defaults

2008-03-04T10:28:43+00:00

This patch removes the #define READ_AHEAD 1024 from the driver and uses the
block layer defaults, instead. We have found that under certain workloads
the setting can cause a disk connected to the e200 controller to go offline.
If the disk hiccups the link may try to downshift but the controller is
never notified that the link successfully completed the renegotiation.
We've also found that performance using the block layer default of 32 pages
was on par with the 1024 setting. We tried setting it to zero at one time
based on info from our firmware guys but that killed performance. Turns out
we were talking about 2 different read ahead settings.
Please consider this for inclusion.

Signed-off-by: Mike Miller 
Signed-off-by: Jens Axboe

resubmit: cciss: procfs updates to display info about many

2008-03-04T10:14:39+00:00

volumes

This patch allows us to display information about all of the logical volumes
configured on a particular controller without stepping on memory even when
there are many volumes (128 or more) configured.
Please consider this for inclusion.

Signed-off-by: Mike Miller 
Signed-off-by: Jens Axboe

cciss: use upper_32_bits() macro to eliminate warnings

2008-02-06T18:41:03+00:00

Use upper_32_bits(x) macro to handle shifts that may be >= the width of
the data type.

drivers/block/cciss.c: In function 'do_cciss_request':
drivers/block/cciss.c:2655: warning: right shift count >= width of type
drivers/block/cciss.c:2656: warning: right shift count >= width of type
drivers/block/cciss.c:2657: warning: right shift count >= width of type
drivers/block/cciss.c:2658: warning: right shift count >= width of type

Signed-off-by: Randy Dunlap 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds