linux-toradex.git/include/linux/bio.h, branch v2.6.23.12

BLOCK: Hide the contents of linux/bio.h if CONFIG_BLOCK=n

2007-08-11T20:34:49+00:00

Hide the contents of linux/bio.h if CONFIG_BLOCK=n as there shouldn't be
compiled code that uses it.

Signed-off-by: David Howells 
Cc: James Bottomley 
Signed-off-by: Andrew Morton 
Signed-off-by: Jens Axboe

[BLOCK] Don't pin lots of memory in mempools

2007-04-30T07:08:17+00:00

Currently we scale the mempool sizes depending on memory installed
in the machine, except for the bio pool itself which sits at a fixed
256 entry pre-allocation.

There's really no point in "optimizing" this OOM path, we just need
enough preallocated to make progress. A single unit is enough, lets
scale it down to 2 just to be on the safe side.

This patch saves ~150kb of pinned kernel memory on a 32-bit box.

Signed-off-by: Jens Axboe

[PATCH] optimize o_direct on block devices

2006-12-13T17:05:50+00:00

Implement block device specific .direct_IO method instead of going through
generic direct_io_worker for block device.

direct_io_worker() is fairly complex because it needs to handle O_DIRECT on
file system, where it needs to perform block allocation, hole detection,
extents file on write, and tons of other corner cases.  The end result is
that it takes tons of CPU time to submit an I/O.

For block device, the block allocation is much simpler and a tight triple
loop can be written to iterate each iovec and each page within the iovec in
order to construct/prepare bio structure and then subsequently submit it to
the block layer.  This significantly speeds up O_D on block device.

[akpm@osdl.org: small speedup]
Signed-off-by: Ken Chen 
Cc: Christoph Hellwig 
Cc: Zach Brown 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] Document bi_sector and sector_t

2006-10-04T17:32:09+00:00

Signed-Off-By: Roger Gammans 
Signed-off-by: Jens Axboe

[PATCH] Allow file systems to differentiate between data and meta reads

2006-09-30T18:29:42+00:00

We can use this information for making more intelligent priority
decisions, and it will also be useful for blktrace.

Signed-off-by: Jens Axboe

[PATCH] Fix "biovec-(256)" in /proc/slabinfo

2006-06-25T17:01:26+00:00

Stringify does what it was told to do.

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

[SCSI] Convert SCSI mid-layer to scsi_execute_async

2005-12-15T03:03:35+00:00

Add scsi helpers to create really-large-requests and convert
scsi-ml to scsi_execute_async().

Per Jens's previous comments, I placed this function in scsi_lib.c.
I made it follow all the queue's limits - I think I did at least :), so
I removed the warning on the function header.

I think the scsi_execute_* functions should eventually take a request_queue
and be placed some place where the dm-multipath hw_handler can use them
if that failover code is going to stay in the kernel. That conversion
patch will be sent in another mail though.

Signed-off-by: Mike Christie 
Signed-off-by: James Bottomley

[PATCH] gfp_t: fs/*

2005-10-28T15:16:47+00:00

 - ->releasepage() annotated (s/int/gfp_t), instances updated
 - missing gfp_t in fs/* added
 - fixed misannotation from the original sweep caught by bitwise checks:
   XFS used __nocast both for gfp_t and for flags used by XFS allocator.
   The latter left with unsigned int __nocast; we might want to add a
   different type for those but for now let's leave them alone.  That,
   BTW, is a case when __nocast use had been actively confusing - it had
   been used in the same code for two different and similar types, with
   no way to catch misuses.  Switch of gfp_t to bitwise had caught that
   immediately...

One tricky bit is left alone to be dealt with later - mapping->flags is
a mix of gfp_t and error indications.  Left alone for now.

Signed-off-by: Al Viro 
Signed-off-by: Linus Torvalds

[PATCH] gfp flags annotations - part 1

2005-10-08T22:00:57+00:00

 - added typedef unsigned int __nocast gfp_t;

 - replaced __nocast uses for gfp flags with gfp_t - it gives exactly
   the same warnings as far as sparse is concerned, doesn't change
   generated code (from gcc point of view we replaced unsigned int with
   typedef) and documents what's going on far better.

Signed-off-by: Al Viro 
Signed-off-by: Linus Torvalds

[PATCH] include/linux/bio.h: "extern inline" -> "static inline"

2005-09-10T17:06:35+00:00

"extern inline" doesn't make much sense.

Signed-off-by: Adrian Bunk 
Acked-by: Jens Axboe 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds