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Commit 2f408420 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block 

* 'for-linus' of git://git.kernel.dk/linux-2.6-block: (34 commits)
  cfq-iosched: Fix the incorrect timeslice accounting with forced_dispatch
  loop: Update mtime when writing using aops
  block: expose the statistics in blkio.time and blkio.sectors for the root cgroup
  backing-dev: Handle class_create() failure
  Block: Fix block/elevator.c elevator_get() off-by-one error
  drbd: lc_element_by_index() never returns NULL
  cciss: unlock on error path
  cfq-iosched: Do not merge queues of BE and IDLE classes
  cfq-iosched: Add additional blktrace log messages in CFQ for easier debugging
  i2o: Remove the dangerous kobj_to_i2o_device macro
  block: remove 16 bytes of padding from struct request on 64bits
  cfq-iosched: fix a kbuild regression
  block: make CONFIG_BLK_CGROUP visible
  Remove GENHD_FL_DRIVERFS
  block: Export max number of segments and max segment size in sysfs
  block: Finalize conversion of block limits functions
  block: Fix overrun in lcm() and move it to lib
  vfs: improve writeback_inodes_wb()
  paride: fix off-by-one test
  drbd: fix al-to-on-disk-bitmap for 4k logical_block_size
  ...
parents 2f10ffcf 3440c49f

Documentation/DocBook/tracepoint.tmpl

+13 −0
Original line number Diff line number Diff line
@@ -16,6 +16,15 @@ 
     </address>

    </affiliation>

   </author>

   <author>

    <firstname>William</firstname>

    <surname>Cohen</surname>

    <affiliation>

     <address>

      <email>wcohen@redhat.com</email>

     </address>

    </affiliation>

   </author>

  </authorgroup>



  <legalnotice>
@@ -91,4 +100,8 @@ 
!Iinclude/trace/events/signal.h

  </chapter>



  <chapter id="block">

   <title>Block IO</title>

!Iinclude/trace/events/block.h

  </chapter>

</book>

Documentation/block/biodoc.txt

+2 −2
Original line number Diff line number Diff line
@@ -1162,8 +1162,8 @@ where a driver received a request ala this before: 


As mentioned, there is no virtual mapping of a bio. For DMA, this is

not a problem as the driver probably never will need a virtual mapping.

Instead it needs a bus mapping (pci_map_page for a single segment or

use blk_rq_map_sg for scatter gather) to be able to ship it to the driver. For

Instead it needs a bus mapping (dma_map_page for a single segment or

use dma_map_sg for scatter gather) to be able to ship it to the driver. For

PIO drivers (or drivers that need to revert to PIO transfer once in a

while (IDE for example)), where the CPU is doing the actual data

transfer a virtual mapping is needed. If the driver supports highmem I/O,

block/Kconfig

+2 −1
Original line number Diff line number Diff line
@@ -78,8 +78,9 @@ config BLK_DEV_INTEGRITY 
	Protection.  If in doubt, say N.



config BLK_CGROUP

	tristate

	tristate "Block cgroup support"

	depends on CGROUPS

	depends on CFQ_GROUP_IOSCHED

	default n

	---help---

	Generic block IO controller cgroup interface. This is the common

block/blk-settings.c

+1 −10
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ 
#include <linux/blkdev.h>

#include <linux/bootmem.h>	/* for max_pfn/max_low_pfn */

#include <linux/gcd.h>

#include <linux/lcm.h>

#include <linux/jiffies.h>

#include <linux/gfp.h>
@@ -462,16 +463,6 @@ void blk_queue_stack_limits(struct request_queue *t, struct request_queue *b) 
}

EXPORT_SYMBOL(blk_queue_stack_limits);



static unsigned int lcm(unsigned int a, unsigned int b)

{

	if (a && b)

		return (a * b) / gcd(a, b);

	else if (b)

		return b;



	return a;

}



/**

 * blk_stack_limits - adjust queue_limits for stacked devices

 * @t:	the stacking driver limits (top device)

block/blk-sysfs.c

+25 −0
Original line number Diff line number Diff line
@@ -107,6 +107,19 @@ static ssize_t queue_max_sectors_show(struct request_queue *q, char *page) 
	return queue_var_show(max_sectors_kb, (page));

}



static ssize_t queue_max_segments_show(struct request_queue *q, char *page)

{

	return queue_var_show(queue_max_segments(q), (page));

}



static ssize_t queue_max_segment_size_show(struct request_queue *q, char *page)

{

	if (test_bit(QUEUE_FLAG_CLUSTER, &q->queue_flags))

		return queue_var_show(queue_max_segment_size(q), (page));



	return queue_var_show(PAGE_CACHE_SIZE, (page));

}



static ssize_t queue_logical_block_size_show(struct request_queue *q, char *page)

{

	return queue_var_show(queue_logical_block_size(q), page);
@@ -281,6 +294,16 @@ static struct queue_sysfs_entry queue_max_hw_sectors_entry = { 
	.show = queue_max_hw_sectors_show,

};



static struct queue_sysfs_entry queue_max_segments_entry = {

	.attr = {.name = "max_segments", .mode = S_IRUGO },

	.show = queue_max_segments_show,

};



static struct queue_sysfs_entry queue_max_segment_size_entry = {

	.attr = {.name = "max_segment_size", .mode = S_IRUGO },

	.show = queue_max_segment_size_show,

};



static struct queue_sysfs_entry queue_iosched_entry = {

	.attr = {.name = "scheduler", .mode = S_IRUGO | S_IWUSR },

	.show = elv_iosched_show,
@@ -356,6 +379,8 @@ static struct attribute *default_attrs[] = { 
	&queue_ra_entry.attr,

	&queue_max_hw_sectors_entry.attr,

	&queue_max_sectors_entry.attr,

	&queue_max_segments_entry.attr,

	&queue_max_segment_size_entry.attr,

	&queue_iosched_entry.attr,

	&queue_hw_sector_size_entry.attr,

	&queue_logical_block_size_entry.attr,