- 07 Aug, 2010 40 commits
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FUJITA Tomonori authored
scsi-ml builds flush requests via q->prepare_flush_fn(), however, builds discard requests via q->prep_rq_fn. Using two different mechnisms for the similar requests (building commands in SCSI ULD) doesn't make sense. Handing both via q->prep_rq_fn makes the code design simpler. Signed-off-by:
FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: James Bottomley <James.Bottomley@suse.de> Reviewed-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Jens Axboe <jaxboe@fusionio.com>
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FUJITA Tomonori authored
This is preparation for removing q->prepare_flush_fn. Temporarily, blk_queue_ordered() permits QUEUE_ORDERED_DO_PREFLUSH and QUEUE_ORDERED_DO_POSTFLUSH without prepare_flush_fn. Signed-off-by:
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FUJITA Tomonori authored
SCSI-ml needs a way to mark a request as flush request in q->prepare_flush_fn because it needs to identify them later (e.g. in q->request_fn or prep_rq_fn). queue_flush sets REQ_HARDBARRIER in rq->cmd_flags however the block layer also sends normal REQ_TYPE_FS requests with REQ_HARDBARRIER. So SCSI-ml can't use REQ_HARDBARRIER to identify flush requests. We could change the block layer to clear REQ_HARDBARRIER bit before sending non flush requests to the lower layers. However, intorudcing the new flag looks cleaner (surely easier). Signed-off-by:
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FUJITA Tomonori authored
- sd_done isn't called for pc request so we never call the code. - we use sd_unprep to free discard page now. Signed-off-by:
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FUJITA Tomonori authored
This fixes discard page leak by using q->unprep_rq_fn facility. q->unprep_rq_fn is called when all the data buffer (req->bio and scsi_data_buffer) in the request is freed. sd_unprep() uses rq->buffer to free discard page allocated in sd_prepare_discard(). Signed-off-by:
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James Bottomley authored
Reviewed-by:
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Joe Perches authored
- add pr_fmt. - convert printks to pr_<level> - add if (0) and printf argument checking to cdinfo - coalesce consecutive printks to single pr_ - fix a typo "back ground" to "background" - convert printks without level to pr_info - remove VIOCD_ prefixes and use pr_fmt/pr_<level> - add a missing newline to an OS/400 message Signed-off-by:
Joe Perches <joe@perches.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Folded in tab indentation fix from Andrew. Signed-off-by:
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Jens Axboe authored
Didn't cause a merge conflict, so fixed this one up manually post merge. Signed-off-by: -
Randy Dunlap authored
Fix extra brace typo that is causing build errors. Signed-off-by:
Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by:
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Andi Kleen authored
No real bugs I believe, just some dead code, and some shut up code. Signed-off-by:
Andi Kleen <ak@linux.intel.com> Cc: Eric Paris <eparis@redhat.com> Signed-off-by:
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Andi Kleen authored
Just some dead code. Signed-off-by:
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Christoph Hellwig authored
Allocating a fixed payload for discard requests always was a horrible hack, and it's not coming to byte us when adding support for discard in DM/MD. So change the code to leave the allocation of a payload to the lowlevel driver. Unfortunately that means we'll need another hack, which allows us to update the various block layer length fields indicating that we have a payload. Instead of hiding this in sd.c, which we already partially do for UNMAP support add a documented helper in the core block layer for it. Signed-off-by:
Mike Snitzer <snitzer@redhat.com> Signed-off-by:
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Christoph Hellwig authored
Move all code for the writeback thread into fs/fs-writeback.c instead of splitting it over two functions in two files. Signed-off-by:
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Christoph Hellwig authored
The wb_list member of struct backing_device_info always has exactly one element. Just use the direct bdi->wb pointer instead and simplify some code. Also remove bdi_task_init which is now trivial to prepare for the next patch. Signed-off-by:
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Christoph Hellwig authored
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Jens Axboe authored
On compilation, gcc correctly detects that we do not handle all types: In function ‘blk_done’: warning: enumeration value ‘REQ_TYPE_FS’ not handled in switch warning: enumeration value ‘REQ_TYPE_SENSE’ not handled in switch warning: enumeration value ‘REQ_TYPE_PM_SUSPEND’ not handled in switch warning: enumeration value ‘REQ_TYPE_PM_RESUME’ not handled in switch warning: enumeration value ‘REQ_TYPE_PM_SHUTDOWN’ not handled in switch warning: enumeration value ‘REQ_TYPE_LINUX_BLOCK’ not handled in switch warning: enumeration value ‘REQ_TYPE_ATA_TASKFILE’ not handled in switch warning: enumeration value ‘REQ_TYPE_ATA_PC’ not handled in switch which is a bit pointless since this is at the end of the request processessing. Add a default case that just breaks out. Signed-off-by: -
Christoph Hellwig authored
Remove the current bio flags and reuse the request flags for the bio, too. This allows to more easily trace the type of I/O from the filesystem down to the block driver. There were two flags in the bio that were missing in the requests: BIO_RW_UNPLUG and BIO_RW_AHEAD. Also I've renamed two request flags that had a superflous RW in them. Note that the flags are in bio.h despite having the REQ_ name - as blkdev.h includes bio.h that is the only way to go for now. Signed-off-by:
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Christoph Hellwig authored
Remove all the trivial wrappers for the cmd_type and cmd_flags fields in struct requests. This allows much easier grepping for different request types instead of unwinding through macros. Signed-off-by:
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FUJITA Tomonori authored
Architectures don't need to define ISA_DMA_THRESHOLD anymore. Signed-off-by:
James Bottomley <James.Bottomley@suse.de> Acked-by:
David Howells <dhowells@redhat.com> Signed-off-by:
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FUJITA Tomonori authored
block uses ISA_DMA_THRESHOLD for BLK_BOUNCE_ISA. Only SCSI uses ISA_DMA_THRESHOLD for ancient drivers with non-zero unchecked_isa_dma. Nowadays drivers (and subsystems) use dma_mask properly instead of ISA_DMA_THRESHOLD. Documentation/scsi/scsi_mid_low_api.txt says: unchecked_isa_dma - 1=>only use bottom 16 MB of ram (ISA DMA addressing restriction), 0=>can use full 32 bit (or better) DMA address space So block simply uses DMA_BIT_MASK(24) for BLK_BOUNCE_ISA for SCSI. Signed-off-by: -
FUJITA Tomonori authored
We can safely remove ISA_DMA_THRESHOLD usage in aha1542. aha1542 uses ISA_DMA_THRESHOLD to see if: - the buffers in scatter/list are below 16MB. - scsi_host is below 16MB. Both checkings were added in the ancient times but aren't necessary nowadays since we properly bounce the buffers and allocate scsi_host below 16MB with non-zero unchecked_isa_dma. Signed-off-by:
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Christoph Hellwig authored
A barrier request should by defintion have priority in get_request and let the queue be unplugged immediately as it's blocking all forward progress due to the queue draining. Most filesystems already get this implicitly by the way how submit_bh treats the buffer_ordered flag, and gfs2 sets it explicitly. But btrfs and XFS are still forgetting to set the flag, as is blkdev_issue_flush and some places in DM/MD. For XFS on metadata heavy workloads this gives a consistent speedup in the 2-3% range. Signed-off-by:
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Stephen Hemminger authored
Convert assertions to use WARN(). There are several error checks in the code for things that should never happen. Convert them to standard warnings so kerneloops.org will see them. Signed-off-by:
Stephen Hemminger <shemminger@vyatta.com> Signed-off-by:
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Stephen Hemminger authored
Convert wait loops to use wait_event_ macros. Signed-off-by:
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Stephen Hemminger authored
Ioctl cmd value is unsigned, so change normalize_ioctl Signed-off-by:
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Stephen Hemminger authored
As reported by sparse, cmos attribute is local. Signed-off-by:
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Stephen Hemminger authored
The usage_count was being protected by a lock which was only there to create an atomic counter. Signed-off-by:
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Stephen Hemminger authored
The first thing the floppy does is read block 0 to test geometry and to test for disk presence. If disk is not present this causes a console warning message about failed I/O. Set flag to silence. Signed-off-by:
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Stephen Hemminger authored
These routines are all big enough that is better to let the compiler decide to inline or not. Signed-off-by:
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Stephen Hemminger authored
Set debug jiffies offset at initialization. Avoids wierd values showing up if debugging enabled. Signed-off-by:
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Mike Miller authored
Change the command padding on 32-bit systems to 0 since setting it to 32 has the identical effect. Signed-off-by:
Mike Miller <mike.miller@hp.com> Cc: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by:
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Mike Miller authored
Remove a debug statement left behind by accident Ths debug statement got left behind. It was commented out after use but not deleted. Signed-off-by:
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Mike Miller authored
The definition of next_command also ended up in wrong place It ended up inside an "#ifdef CONFIG_PROCFS". Already caught by Randy Dunlap and a couple others. Tried to put it somewhere that made sense. Signed-off-by:
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Mike Miller authored
call to put_controller_in_performant_mode was in the wrong place The call inadvertently ended up in an error path. Signed-off-by:
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Mike Miller authored
Make sure we register the performant mode interrupt Another blunder. Seemed to work because the call to put_controller_into_performant_mode was never called. Signed-off-by:
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Jens Axboe authored
The code for nonrot, random, and io stats are completely identical. Signed-off-by: -
Jens Axboe authored
There are two reasons for doing this: - On SSD disks, the completion times aren't as random as they are for rotational drives. So it's questionable whether they should contribute to the random pool in the first place. - Calling add_disk_randomness() has a lot of overhead. This adds /sys/block/<dev>/queue/add_random that will allow you to switch off on a per-device basis. The default setting is on, so there should be no functional changes from this patch. Signed-off-by: -
Mike Miller authored
Add support for new controllers due out next year. HP must continue to support new controllers in older distros. All vendors require support be upstream. These controllers support only 16 commands in simple mode but can support up to 1024 in performant mode. See patch 5/6/ We have no marketing names yet. Signed-off-by:
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Mike Miller authored
Add a mode of controller operation called Performant Mode. Even though cciss has been deprecated in favor of hpsa there are new controllers due out next year that HP must support in older vendor distros. Vendors require all fixes/features be upstream. These new controllers support only 16 commands in simple mode but support up to 1024 in performant mode. This requires us to add this support at this late date. The performant mode transport minimizes host PCI accesses by performinf many completions per read. PCI writes are posted so the host can write then immediately get off the bus not waiting for the writwe to complete to the target. In the context of performant mode the host read out to a controller pulls all posted writes into host memory ensuring the reply queue is coherent. Signed-off-by:
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Mike Miller authored
Change the return type of our interrupt access routines to bool from unsigned long. It makes more sense that way. Signed-off-by:
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