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Subject[GIT PULL] block updates for 2.6.31-rc1
Hi Linus,

Pushing this out before -rc1, since the queue limits block helper will
be required by a DM push soon.

Nothing really major in here, just small fixes or cleanups. The 3
patches from me are preparatory patches from the per-bdi writeback
series.

Please pull.

git://git.kernel.dk/linux-2.6-block.git for-linus

Gui Jianfeng (1):
cfq: cleanup for last_end_request in cfq_data

Jeff Moyer (1):
cfq: remove extraneous '\n' in blktrace output

Jens Axboe (3):
block: don't overwrite bdi->state after bdi_init() has been run
btrfs: properly register fs backing device
ubifs: register backing_dev_info

Martin K. Petersen (1):
block: Introduce helper to reset queue limits to default values

unsik Kim (1):
mg_disk: seperate mg_disk.h again

block/blk-core.c | 5 +++++
block/blk-settings.c | 37 +++++++++++++++++++++++++++----------
block/cfq-iosched.c | 7 +------
drivers/block/mg_disk.c | 28 +---------------------------
fs/btrfs/disk-io.c | 26 +++++++++++++++++++++-----
fs/ubifs/super.c | 3 +++
include/linux/blkdev.h | 1 +
include/linux/mg_disk.h | 45 +++++++++++++++++++++++++++++++++++++++++++++
8 files changed, 104 insertions(+), 48 deletions(-)
create mode 100644 include/linux/mg_disk.h
diff --git a/block/blk-core.c b/block/blk-core.c
index f6452f6..94d88fa 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -498,6 +498,11 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)

q->backing_dev_info.unplug_io_fn = blk_backing_dev_unplug;
q->backing_dev_info.unplug_io_data = q;
+ q->backing_dev_info.ra_pages =
+ (VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE;
+ q->backing_dev_info.state = 0;
+ q->backing_dev_info.capabilities = BDI_CAP_MAP_COPY;
+
err = bdi_init(&q->backing_dev_info);
if (err) {
kmem_cache_free(blk_requestq_cachep, q);
diff --git a/block/blk-settings.c b/block/blk-settings.c
index d71cedc..7541ea4 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -96,6 +96,31 @@ void blk_queue_lld_busy(struct request_queue *q, lld_busy_fn *fn)
EXPORT_SYMBOL_GPL(blk_queue_lld_busy);

/**
+ * blk_set_default_limits - reset limits to default values
+ * @limits: the queue_limits structure to reset
+ *
+ * Description:
+ * Returns a queue_limit struct to its default state. Can be used by
+ * stacking drivers like DM that stage table swaps and reuse an
+ * existing device queue.
+ */
+void blk_set_default_limits(struct queue_limits *lim)
+{
+ lim->max_phys_segments = MAX_PHYS_SEGMENTS;
+ lim->max_hw_segments = MAX_HW_SEGMENTS;
+ lim->seg_boundary_mask = BLK_SEG_BOUNDARY_MASK;
+ lim->max_segment_size = MAX_SEGMENT_SIZE;
+ lim->max_sectors = lim->max_hw_sectors = SAFE_MAX_SECTORS;
+ lim->logical_block_size = lim->physical_block_size = lim->io_min = 512;
+ lim->bounce_pfn = BLK_BOUNCE_ANY;
+ lim->alignment_offset = 0;
+ lim->io_opt = 0;
+ lim->misaligned = 0;
+ lim->no_cluster = 0;
+}
+EXPORT_SYMBOL(blk_set_default_limits);
+
+/**
* blk_queue_make_request - define an alternate make_request function for a device
* @q: the request queue for the device to be affected
* @mfn: the alternate make_request function
@@ -123,18 +148,8 @@ void blk_queue_make_request(struct request_queue *q, make_request_fn *mfn)
* set defaults
*/
q->nr_requests = BLKDEV_MAX_RQ;
- blk_queue_max_phys_segments(q, MAX_PHYS_SEGMENTS);
- blk_queue_max_hw_segments(q, MAX_HW_SEGMENTS);
- blk_queue_segment_boundary(q, BLK_SEG_BOUNDARY_MASK);
- blk_queue_max_segment_size(q, MAX_SEGMENT_SIZE);

q->make_request_fn = mfn;
- q->backing_dev_info.ra_pages =
- (VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE;
- q->backing_dev_info.state = 0;
- q->backing_dev_info.capabilities = BDI_CAP_MAP_COPY;
- blk_queue_max_sectors(q, SAFE_MAX_SECTORS);
- blk_queue_logical_block_size(q, 512);
blk_queue_dma_alignment(q, 511);
blk_queue_congestion_threshold(q);
q->nr_batching = BLK_BATCH_REQ;
@@ -147,6 +162,8 @@ void blk_queue_make_request(struct request_queue *q, make_request_fn *mfn)
q->unplug_timer.function = blk_unplug_timeout;
q->unplug_timer.data = (unsigned long)q;

+ blk_set_default_limits(&q->limits);
+
/*
* by default assume old behaviour and bounce for any highmem page
*/
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index ef2f72d..833ec18 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -122,7 +122,6 @@ struct cfq_data {
struct cfq_queue *async_idle_cfqq;

sector_t last_position;
- unsigned long last_end_request;

/*
* tunables, see top of file
@@ -1253,7 +1252,7 @@ static int cfq_forced_dispatch(struct cfq_data *cfqd)

BUG_ON(cfqd->busy_queues);

- cfq_log(cfqd, "forced_dispatch=%d\n", dispatched);
+ cfq_log(cfqd, "forced_dispatch=%d", dispatched);
return dispatched;
}

@@ -2164,9 +2163,6 @@ static void cfq_completed_request(struct request_queue *q, struct request *rq)
if (cfq_cfqq_sync(cfqq))
cfqd->sync_flight--;

- if (!cfq_class_idle(cfqq))
- cfqd->last_end_request = now;
-
if (sync)
RQ_CIC(rq)->last_end_request = now;

@@ -2479,7 +2475,6 @@ static void *cfq_init_queue(struct request_queue *q)

INIT_WORK(&cfqd->unplug_work, cfq_kick_queue);

- cfqd->last_end_request = jiffies;
cfqd->cfq_quantum = cfq_quantum;
cfqd->cfq_fifo_expire[0] = cfq_fifo_expire[0];
cfqd->cfq_fifo_expire[1] = cfq_fifo_expire[1];
diff --git a/drivers/block/mg_disk.c b/drivers/block/mg_disk.c
index 60de5a0..f703f54 100644
--- a/drivers/block/mg_disk.c
+++ b/drivers/block/mg_disk.c
@@ -22,13 +22,12 @@
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
+#include <linux/mg_disk.h>

#define MG_RES_SEC (CONFIG_MG_DISK_RES << 1)

/* name for block device */
#define MG_DISK_NAME "mgd"
-/* name for platform device */
-#define MG_DEV_NAME "mg_disk"

#define MG_DISK_MAJ 0
#define MG_DISK_MAX_PART 16
@@ -103,33 +102,8 @@
#define MG_TMAX_SWRST_TO_RDY 500
#define MG_TMAX_RSTOUT 3000

-/* device attribution */
-/* use mflash as boot device */
-#define MG_BOOT_DEV (1 << 0)
-/* use mflash as storage device */
-#define MG_STORAGE_DEV (1 << 1)
-/* same as MG_STORAGE_DEV, but bootloader already done reset sequence */
-#define MG_STORAGE_DEV_SKIP_RST (1 << 2)
-
#define MG_DEV_MASK (MG_BOOT_DEV | MG_STORAGE_DEV | MG_STORAGE_DEV_SKIP_RST)

-/* names of GPIO resource */
-#define MG_RST_PIN "mg_rst"
-/* except MG_BOOT_DEV, reset-out pin should be assigned */
-#define MG_RSTOUT_PIN "mg_rstout"
-
-/* private driver data */
-struct mg_drv_data {
- /* disk resource */
- u32 use_polling;
-
- /* device attribution */
- u32 dev_attr;
-
- /* internally used */
- struct mg_host *host;
-};
-
/* main structure for mflash driver */
struct mg_host {
struct device *dev;
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 0d50d49..d28d29c 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -42,6 +42,8 @@
static struct extent_io_ops btree_extent_io_ops;
static void end_workqueue_fn(struct btrfs_work *work);

+static atomic_t btrfs_bdi_num = ATOMIC_INIT(0);
+
/*
* end_io_wq structs are used to do processing in task context when an IO is
* complete. This is used during reads to verify checksums, and it is used
@@ -1342,12 +1344,25 @@ static void btrfs_unplug_io_fn(struct backing_dev_info *bdi, struct page *page)
free_extent_map(em);
}

+/*
+ * If this fails, caller must call bdi_destroy() to get rid of the
+ * bdi again.
+ */
static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi)
{
- bdi_init(bdi);
+ int err;
+
+ bdi->capabilities = BDI_CAP_MAP_COPY;
+ err = bdi_init(bdi);
+ if (err)
+ return err;
+
+ err = bdi_register(bdi, NULL, "btrfs-%d",
+ atomic_inc_return(&btrfs_bdi_num));
+ if (err)
+ return err;
+
bdi->ra_pages = default_backing_dev_info.ra_pages;
- bdi->state = 0;
- bdi->capabilities = default_backing_dev_info.capabilities;
bdi->unplug_io_fn = btrfs_unplug_io_fn;
bdi->unplug_io_data = info;
bdi->congested_fn = btrfs_congested_fn;
@@ -1569,7 +1584,8 @@ struct btrfs_root *open_ctree(struct super_block *sb,
fs_info->sb = sb;
fs_info->max_extent = (u64)-1;
fs_info->max_inline = 8192 * 1024;
- setup_bdi(fs_info, &fs_info->bdi);
+ if (setup_bdi(fs_info, &fs_info->bdi))
+ goto fail_bdi;
fs_info->btree_inode = new_inode(sb);
fs_info->btree_inode->i_ino = 1;
fs_info->btree_inode->i_nlink = 1;
@@ -1946,8 +1962,8 @@ fail_iput:

btrfs_close_devices(fs_info->fs_devices);
btrfs_mapping_tree_free(&fs_info->mapping_tree);
+fail_bdi:
bdi_destroy(&fs_info->bdi);
-
fail:
kfree(extent_root);
kfree(tree_root);
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 3589eab..3260b73 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -1937,6 +1937,9 @@ static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
err = bdi_init(&c->bdi);
if (err)
goto out_close;
+ err = bdi_register(&c->bdi, NULL, "ubifs");
+ if (err)
+ goto out_bdi;

err = ubifs_parse_options(c, data, 0);
if (err)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 0b1a6ca..8963d91 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -926,6 +926,7 @@ extern void blk_queue_alignment_offset(struct request_queue *q,
unsigned int alignment);
extern void blk_queue_io_min(struct request_queue *q, unsigned int min);
extern void blk_queue_io_opt(struct request_queue *q, unsigned int opt);
+extern void blk_set_default_limits(struct queue_limits *lim);
extern int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
sector_t offset);
extern void disk_stack_limits(struct gendisk *disk, struct block_device *bdev,
diff --git a/include/linux/mg_disk.h b/include/linux/mg_disk.h
new file mode 100644
index 0000000..e11f4d9
--- /dev/null
+++ b/include/linux/mg_disk.h
@@ -0,0 +1,45 @@
+/*
+ * include/linux/mg_disk.c
+ *
+ * Private data for mflash platform driver
+ *
+ * (c) 2008 mGine Co.,LTD
+ * (c) 2008 unsik Kim <donari75@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __MG_DISK_H__
+#define __MG_DISK_H__
+
+/* name for platform device */
+#define MG_DEV_NAME "mg_disk"
+
+/* names of GPIO resource */
+#define MG_RST_PIN "mg_rst"
+/* except MG_BOOT_DEV, reset-out pin should be assigned */
+#define MG_RSTOUT_PIN "mg_rstout"
+
+/* device attribution */
+/* use mflash as boot device */
+#define MG_BOOT_DEV (1 << 0)
+/* use mflash as storage device */
+#define MG_STORAGE_DEV (1 << 1)
+/* same as MG_STORAGE_DEV, but bootloader already done reset sequence */
+#define MG_STORAGE_DEV_SKIP_RST (1 << 2)
+
+/* private driver data */
+struct mg_drv_data {
+ /* disk resource */
+ u32 use_polling;
+
+ /* device attribution */
+ u32 dev_attr;
+
+ /* internally used */
+ void *host;
+};
+
+#endif
--
Jens Axboe



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