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Miquel van Smoorenburg 38c8e61809 do_mpage_readpage(): don't submit lots of small bios on boundary 
While tracing I/O patterns with blktrace (a great tool) a few weeks ago I
identified a minor issue in fs/mpage.c

As the comment above mpage_readpages() says, a fs's get_block function
will set BH_Boundary when it maps a block just before a block for which
extra I/O is required.

Since get_block() can map a range of pages, for all these pages the
BH_Boundary flag will be set.  But we only need to push what I/O we have
accumulated at the last block of this range.

This makes do_mpage_readpage() send out the largest possible bio instead
of a bunch of page-sized ones in the BH_Boundary case.

Signed-off-by: Miquel van Smoorenburg <mikevs@xs4all.net>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-06 15:58:59 -08:00
..
9p
Merge branch 'next' into for-linus
2008-12-25 11:40:09 +11:00
adfs
vfs: Use const for kernel parser table
2008-10-13 10:10:37 -07:00
affs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
2009-01-05 18:32:06 -08:00
afs
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
autofs
zero i_uid/i_gid on inode allocation
2009-01-05 11:54:28 -05:00
autofs4
zero i_uid/i_gid on inode allocation
2009-01-05 11:54:28 -05:00
befs
befs: ensure fast symlinks are NUL-terminated
2008-12-31 18:07:40 -05:00
bfs
CRED: Wrap task credential accesses in the BFS filesystem
2008-11-14 10:38:47 +11:00
cifs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
2009-01-05 18:32:06 -08:00
coda
add a vfs_fsync helper
2009-01-05 11:54:28 -05:00
configfs
zero i_uid/i_gid on inode allocation
2009-01-05 11:54:28 -05:00
cramfs
zero i_uid/i_gid on inode allocation
2009-01-05 11:54:28 -05:00
debugfs
zero i_uid/i_gid on inode allocation
2009-01-05 11:54:28 -05:00
devpts
zero i_uid/i_gid on inode allocation
2009-01-05 11:54:28 -05:00
dlm
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm
2009-01-05 19:02:09 -08:00
ecryptfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
2009-01-05 18:32:06 -08:00
efs
[PATCH] switch all filesystems over to d_obtain_alias
2008-10-23 05:13:01 -04:00
exportfs
Merge branch 'next' into for-linus
2008-12-25 11:40:09 +11:00
ext2
nfsd race fixes: ext2
2008-12-31 18:07:43 -05:00
ext3
ext3: Add default allocation routines for quota structures
2009-01-05 08:40:25 -08:00
ext4
ext4: Add default allocation routines for quota structures
2009-01-05 08:40:26 -08:00
fat
Merge git://git.kernel.org/pub/scm/linux/kernel/git/hirofumi/fatfs-2.6
2008-12-30 20:33:34 -08:00
freevxfs
freevxfs: ensure fast symlinks are NUL-terminated
2008-12-31 18:07:40 -05:00
fuse
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
gfs2
GFS2: Use DEFINE_SPINLOCK
2009-01-05 07:45:02 +00:00
hfs
CRED: Wrap task credential accesses in the HFS filesystem
2008-11-14 10:38:54 +11:00
hfsplus
CRED: Wrap task credential accesses in the HFSplus filesystem
2008-11-14 10:38:54 +11:00
hostfs
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
hpfs
CRED: Wrap task credential accesses in the HPFS filesystem
2008-11-14 10:38:55 +11:00
hppfs
CRED: Use creds in file structs
2008-11-14 10:39:25 +11:00
hugetlbfs
zero i_uid/i_gid on inode allocation
2009-01-05 11:54:28 -05:00
isofs
isofs check for NULL ->i_op in root directory is dead code
2009-01-05 11:53:38 -05:00
jbd
jbd: don't give up looking for space so easily in __log_wait_for_space
2008-11-06 22:37:59 -05:00
jbd2
jbd2: Add buffer triggers
2009-01-05 08:40:30 -08:00
jffs2
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
jfs
fix the treatment of jfs special inodes
2009-01-05 11:54:29 -05:00
lockd
Merge branch 'devel' into next
2008-12-30 16:51:43 -05:00
minix
CRED: Wrap task credential accesses in the Minix filesystem
2008-11-14 10:38:57 +11:00
ncpfs
CRED: Wrap task credential accesses in the NCPFS filesystem
2008-11-14 10:38:58 +11:00
nfs
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
nfs_common
SUNRPC: nfsacl_encode/nfsacl_decode should be exported as GPL-only
2008-12-23 15:21:32 -05:00
nfsd
add a vfs_fsync helper
2009-01-05 11:54:28 -05:00
nls
remove CONFIG_KMOD from fs
2008-10-17 02:38:36 +11:00
notify
inotify: fix type errors in interfaces
2009-01-05 11:54:29 -05:00
ntfs
ntfs: don't NULL i_op
2009-01-05 11:54:27 -05:00
ocfs2
Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2
2009-01-05 18:32:43 -08:00
omfs
zero i_uid/i_gid on inode allocation
2009-01-05 11:54:28 -05:00
openpromfs
zero i_uid/i_gid on inode allocation
2009-01-05 11:54:28 -05:00
partitions
block/md: fix md autodetection
2008-11-18 15:08:56 +01:00
proc
mm: report the MMU pagesize in /proc/pid/smaps
2009-01-06 15:58:58 -08:00
qnx4
…
ramfs
zero i_uid/i_gid on inode allocation
2009-01-05 11:54:28 -05:00
reiserfs
Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2
2009-01-05 18:32:43 -08:00
romfs
zero i_uid/i_gid on inode allocation
2009-01-05 11:54:28 -05:00
smbfs
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
sysfs
zero i_uid/i_gid on inode allocation
2009-01-05 11:54:28 -05:00
sysv
sysv: ensure fast symlinks are NUL-terminated
2008-12-31 18:07:39 -05:00
ubifs
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
udf
Merge branch 'master' into next
2008-12-04 17:16:36 +11:00
ufs
CRED: Wrap task credential accesses in the UFS filesystem
2008-11-14 10:39:04 +11:00
xfs
[XFS] Fix merge failures
2008-12-29 16:47:18 +11:00
aio.c
aio: make the lookup_ioctx() lockless
2008-12-29 08:29:50 +01:00
anon_inodes.c
anon_inodes: use fops->owner for module refcount
2008-12-31 16:55:44 +02:00
attr.c
CRED: Wrap task credential accesses in the filesystem subsystem
2008-11-14 10:39:05 +11:00
bad_inode.c
kill ->dir_notify()
2008-12-31 18:07:43 -05:00
binfmt_aout.c
sanitize ifdefs in binfmt_aout
2009-01-03 11:45:54 -08:00
binfmt_elf_fdpic.c
CRED: Make execve() take advantage of copy-on-write credentials
2008-11-14 10:39:24 +11:00
binfmt_elf.c
Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6
2008-12-28 12:33:21 -08:00
binfmt_em86.c
Allow recursion in binfmt_script and binfmt_misc
2008-10-16 11:21:38 -07:00
binfmt_flat.c
CRED: Make execve() take advantage of copy-on-write credentials
2008-11-14 10:39:24 +11:00
binfmt_misc.c
zero i_uid/i_gid on inode allocation
2009-01-05 11:54:28 -05:00
binfmt_script.c
Allow recursion in binfmt_script and binfmt_misc
2008-10-16 11:21:38 -07:00
binfmt_som.c
CRED: Make execve() take advantage of copy-on-write credentials
2008-11-14 10:39:24 +11:00
bio-integrity.c
bio: allow individual slabs in the bio_set
2008-12-29 08:29:23 +01:00
bio.c
bio: get rid of bio_vec clearing
2008-12-29 08:29:53 +01:00
block_dev.c
fs/block_dev.c: __read_mostly improvement and sb_is_blkdev_sb utilization
2008-12-31 18:07:43 -05:00
buffer.c
fs: symlink write_begin allocation context fix
2009-01-04 13:33:20 -08:00
char_dev.c
[PATCH] tidy up chrdev_open
2008-10-23 05:12:59 -04:00
compat_binfmt_elf.c
…
compat_ioctl.c
…
compat.c
CRED: Make execve() take advantage of copy-on-write credentials
2008-11-14 10:39:24 +11:00
dcache.c
filp_cachep can be static in fs/file_table.c
2008-12-31 18:07:42 -05:00
dcookies.c
shrink struct dentry
2008-12-31 18:07:38 -05:00
direct-io.c
Remove Andrew Morton's old email accounts
2008-10-16 11:21:32 -07:00
dquot.c
quota: Export dquot_alloc() and dquot_destroy() functions
2009-01-05 08:40:25 -08:00
drop_caches.c
…
eventfd.c
…
eventpoll.c
epoll: introduce resource usage limits
2008-12-01 19:55:24 -08:00
exec.c
sys_execve and sys_uselib do not call into fsnotify
2009-01-05 11:54:28 -05:00
fcntl.c
Merge branch 'next' into for-linus
2008-12-25 11:40:09 +11:00
fifo.c
[PATCH] introduce fmode_t, do annotations
2008-10-21 07:47:06 -04:00
file_table.c
filp_cachep can be static in fs/file_table.c
2008-12-31 18:07:42 -05:00
file.c
[PATCH] merge locate_fd() and get_unused_fd()
2008-08-01 11:25:23 -04:00
filesystems.c
vfs: remove duplicate code in get_fs_type()
2009-01-05 11:54:29 -05:00
fs-writeback.c
Remove Andrew Morton's old email accounts
2008-10-16 11:21:32 -07:00
generic_acl.c
…
inode.c
zero i_uid/i_gid on inode allocation
2009-01-05 11:54:28 -05:00
internal.h
CRED: Make execve() take advantage of copy-on-write credentials
2008-11-14 10:39:24 +11:00
ioctl.c
GFS2: Support for FIEMAP ioctl
2009-01-05 07:38:46 +00:00
ioprio.c
CRED: Use RCU to access another task's creds and to release a task's own creds
2008-11-14 10:39:19 +11:00
Kconfig
ocfs2: Assign feature bits and system inodes to quota feature and quota files
2009-01-05 08:40:23 -08:00
Kconfig.binfmt
add CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS
2008-10-20 08:52:39 -07:00
libfs.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
2009-01-05 18:32:06 -08:00
locks.c
CRED: Wrap task credential accesses in the filesystem subsystem
2008-11-14 10:39:05 +11:00
Makefile
quota: Split off quota tree handling into a separate file
2009-01-05 08:40:21 -08:00
mbcache.c
…
mpage.c
do_mpage_readpage(): don't submit lots of small bios on boundary
2009-01-06 15:58:59 -08:00
namei.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
2009-01-05 18:32:06 -08:00
namespace.c
fs/namespace.c: drop code after return
2008-12-31 18:07:38 -05:00
nfsctl.c
pass a struct path * to may_open
2008-12-31 18:07:41 -05:00
no-block.c
…
open.c
inode->i_op is never NULL
2009-01-05 11:54:28 -05:00
pipe.c
sanitize audit_fd_pair()
2009-01-04 15:14:41 -05:00
pnode.c
…
pnode.h
…
posix_acl.c
CRED: Wrap task credential accesses in the filesystem subsystem
2008-11-14 10:39:05 +11:00
quota_tree.c
quota: Split off quota tree handling into a separate file
2009-01-05 08:40:21 -08:00
quota_tree.h
quota: Split off quota tree handling into a separate file
2009-01-05 08:40:21 -08:00
quota_v1.c
quota: Move quotaio_v[12].h from include/linux/ to fs/
2009-01-05 08:36:58 -08:00
quota_v2.c
quota: Convert union in mem_dqinfo to a pointer
2009-01-05 08:40:21 -08:00
quota.c
quota: Introduce DQUOT_QUOTA_SYS_FILE flag
2009-01-05 08:36:57 -08:00
quotaio_v1.h
quota: Move quotaio_v[12].h from include/linux/ to fs/
2009-01-05 08:36:58 -08:00
quotaio_v2.h
quota: Split off quota tree handling into a separate file
2009-01-05 08:40:21 -08:00
read_write.c
vfs: lseek(fd, 0, SEEK_CUR) race condition
2009-01-05 11:53:07 -05:00
read_write.h
…
readdir.c
[PATCH] prepare vfs_readdir() callers to returning filldir result
2008-10-23 05:13:10 -04:00
select.c
select: deal with math overflow from borderline valid userland data
2008-10-26 11:22:08 -07:00
seq_file.c
Merge branch 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-01-03 12:04:39 -08:00
signalfd.c
…
splice.c
fs: remove prepare_write/commit_write
2008-10-30 11:38:45 -07:00
stack.c
…
stat.c
inode->i_op is never NULL
2009-01-05 11:54:28 -05:00
super.c
security: pass mount flags to security_sb_kern_mount()
2008-12-20 09:02:39 +11:00
sync.c
add a vfs_fsync helper
2009-01-05 11:54:28 -05:00
timerfd.c
hrtimer: convert timerfd to the new hrtimer apis
2008-09-05 21:35:09 -07:00
utimes.c
…
xattr_acl.c
…
xattr.c
inode->i_op is never NULL
2009-01-05 11:54:28 -05:00