Mikulas Patocka 1c0b8a7a62 hpfs: optimize quad buffer loading ... HPFS needs to load 4 consecutive 512-byte sectors when accessing the directory nodes or bitmaps. We can't switch to 2048-byte block size because files are allocated in the units of 512-byte sectors. Previously, the driver would allocate a 2048-byte area using kmalloc, copy the data from four buffers to this area and eventually copy them back if they were modified. In the current implementation of the buffer cache, buffers are allocated in the pagecache. That means that 4 consecutive 512-byte buffers are stored in consecutive areas in the kernel address space. So, we don't need to allocate extra memory and copy the content of the buffers there. This patch optimizes the code to avoid copying the buffers. It checks if the four buffers are stored in contiguous memory - if they are not, it falls back to allocating a 2048-byte area and copying data there. Signed-off-by: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2014-02-02 16:24:07 -08:00
..
9p	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-01-28 08:38:04 -08:00
adfs
affs	affs: use ->kill_sb() to simplify ->put_super() and failure exits of ->mount()	2014-01-25 03:13:01 -05:00
afs	afs: proc cells and rootcell are writeable	2014-02-01 10:59:39 -08:00
autofs4	autofs: fix symlinks aren't checked for expiry	2014-01-23 16:36:59 -08:00
befs	befs: iget_locked() doesn't return an ERR_PTR	2014-01-25 03:14:38 -05:00
bfs
btrfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs	2014-01-30 20:08:20 -08:00
cachefiles
ceph	ceph: fix missing dput in ceph_set_acl	2014-01-31 08:14:06 -08:00
cifs	cifs: Fix check for regular file in couldbe_mf_symlink()	2014-01-31 09:06:43 -06:00
coda
configfs
cramfs	cramfs: take headers to fs/cramfs	2014-01-25 03:13:02 -05:00
debugfs
devpts
dlm	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2014-01-25 11:17:34 -08:00
ecryptfs	ecryptfs: fix failure handling in ->readlink()	2014-01-25 03:13:00 -05:00
efivarfs
efs	efs: get rid of ->put_super()	2014-01-25 03:13:02 -05:00
exofs	exofs: Print less in r4w	2014-01-23 18:54:14 +02:00
exportfs
ext2	ext2/3/4: use generic posix ACL infrastructure	2014-01-25 23:58:19 -05:00
ext3	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-01-28 08:38:04 -08:00
ext4	Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block	2014-01-30 11:19:05 -08:00
f2fs	Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block	2014-01-30 11:19:05 -08:00
fat
freevxfs
fscache
fuse	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-01-28 08:38:04 -08:00
gfs2	Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block	2014-01-30 11:19:05 -08:00
hfs
hfsplus	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-02-01 10:43:45 -08:00
hostfs	um: hostfs: make functions static	2014-01-26 11:51:09 +01:00
hpfs	hpfs: optimize quad buffer loading	2014-02-02 16:24:07 -08:00
hppfs
hugetlbfs
isofs
jbd
jbd2
jffs2	MTD updates for 3.14:	2014-01-28 18:56:37 -08:00
jfs	Minor bug fix for linux-3.14	2014-01-31 08:14:35 -08:00
kernfs	kernfs: associate a new kernfs_node with its parent on creation	2014-01-17 11:50:07 -08:00
lockd
logfs	Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block	2014-01-30 11:19:05 -08:00
minix
ncpfs
nfs	NFS client bugfixes for Linux 3.14	2014-01-31 15:39:07 -08:00
nfs_common
nfsd	Merge branch 'for-3.14' of git://linux-nfs.org/~bfields/linux	2014-01-30 10:18:43 -08:00
nilfs2	Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block	2014-01-30 11:19:05 -08:00
nls	nls: have register_nls() set ->owner	2014-01-25 03:14:05 -05:00
notify	fanotify: Fix use after free for permission events	2014-01-29 13:57:17 +01:00
ntfs
ocfs2	Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block	2014-01-30 11:19:05 -08:00
omfs
openpromfs
proc	fs/proc/array.c: change do_task_stat() to use while_each_thread()	2014-01-23 16:37:02 -08:00
pstore	pstore: Don't allow high traffic options on fragile devices	2013-12-20 13:12:01 -08:00
qnx4	qnx4: clean qnx4_fill_super() up	2014-01-25 03:13:03 -05:00
qnx6
quota
ramfs	fs/ramfs: move ramfs_aops to inode.c	2014-01-23 16:36:58 -08:00
reiserfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-01-28 08:38:04 -08:00
romfs	romfs: fix returm err while getting inode in fill_super	2014-01-23 16:37:04 -08:00
squashfs
sysfs	Revert "kernfs, sysfs, driver-core: implement kernfs_remove_self() and its wrappers"	2014-01-13 14:05:13 -08:00
sysv
ubifs	fs/ubifs: use rbtree postorder iteration helper instead of opencoding	2014-01-23 16:37:03 -08:00
udf	udf: Fix lockdep warning from udf_symlink()	2013-12-23 22:02:16 +01:00
ufs
xfs	Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block	2014-01-30 11:19:05 -08:00
aio.c	Merge git://git.kvack.org/~bcrl/aio-next	2013-12-22 11:03:49 -08:00
anon_inodes.c
attr.c
bad_inode.c
binfmt_aout.c
binfmt_elf_fdpic.c
binfmt_elf.c	fs: binfmt_elf: remove unused defines INTERPRETER_NONE and INTERPRETER_ELF	2014-01-23 16:36:58 -08:00
binfmt_em86.c
binfmt_flat.c
binfmt_misc.c
binfmt_script.c
binfmt_som.c
bio-integrity.c	bio-integrity: Fix bio_integrity_verify segment start bug	2014-01-21 20:32:05 -08:00
bio.c	Revert "block: Warn and free bio if bi_end_io is not set"	2014-01-08 14:14:22 -07:00
block_dev.c
buffer.c
char_dev.c
compat_binfmt_elf.c
compat_ioctl.c	fs/compat_ioctl.c: fix an underflow issue (harmless)	2014-01-21 16:19:42 -08:00
compat.c
coredump.c	coredump: make __get_dumpable/get_dumpable inline, kill fs/coredump.h	2014-01-23 16:37:01 -08:00
dcache.c	__dentry_path() fixes	2014-01-26 12:37:55 -05:00
dcookies.c	fs/compat: fix lookup_dcookie() parameter handling	2014-01-29 16:22:40 -08:00
direct-io.c
drop_caches.c
eventfd.c	eventfd_ctx_fdget(): use fdget() instead of fget()	2014-01-25 03:13:04 -05:00
eventpoll.c	epoll: do not take the nested ep->mtx on EPOLL_CTL_DEL	2014-01-02 14:40:30 -08:00
exec.c	fs/exec.c: call arch_pick_mmap_layout() only once	2014-01-23 16:37:02 -08:00
fcntl.c
fhandle.c
file_table.c
file.c	fs: __fget_light() can use __fget() in slow path	2014-01-25 03:14:38 -05:00
filesystems.c
fs_struct.c
fs-writeback.c	writeback: Fix data corruption on NFS	2013-12-14 04:21:26 +08:00
inode.c
internal.h
ioctl.c
ioprio.c
Kconfig	fs: remove generic_acl	2014-01-26 08:26:40 -05:00
Kconfig.binfmt
libfs.c
locks.c
Makefile	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-01-28 08:38:04 -08:00
mbcache.c
mount.h	vfs: Is mounted should be testing mnt_ns for NULL or error.	2014-01-26 08:26:42 -05:00
mpage.c
namei.c	Fix mountpoint reference leakage in linkat	2014-01-31 17:33:13 -05:00
namespace.c	Driver core / sysfs patches for 3.14-rc1	2014-01-20 15:49:44 -08:00
no-block.c
open.c
pipe.c	fs/pipe.c: skip file_update_time on frozen fs	2014-01-23 16:37:00 -08:00
pnode.c
pnode.h
posix_acl.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-01-28 08:38:04 -08:00
proc_namespace.c	fs/proc_namespace.c: simplify testing nsp and nsp->mnt_ns	2014-01-23 16:37:02 -08:00
read_write.c	fs/compat: fix parameter handling for compat readv/writev syscalls	2014-01-29 16:22:39 -08:00
readdir.c
select.c
seq_file.c
signalfd.c
splice.c	fuse: fix pipe_buf_operations	2014-01-22 19:36:57 +01:00
stack.c
stat.c
statfs.c
super.c	fs/super.c: sync ro remount after blocking writers	2014-01-31 14:29:36 -05:00
sync.c
timerfd.c
utimes.c
xattr.c