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	configfs: fix race between dentry put and lookup	2013-11-21 16:42:27 -08:00
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	consolidate simple ->d_delete() instances	2013-11-15 22:04:17 -05:00
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	jbd: Revise KERN_EMERG error messages	2013-12-04 12:27:46 +01:00
jbd2	jbd2: rename obsoleted msg JBD->JBD2	2013-12-08 21:14:59 -05:00
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	genetlink: make multicast groups const, prevent abuse	2013-11-19 16:39:06 -05:00
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	Squashfs: fix failure to unlock pages on decompress error	2013-11-24 01:02:50 +00:00
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
Kconfig	fs: remove generic_acl	2014-01-26 08:26:40 -05:00
Kconfig.binfmt	…
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
aio.c	Merge git://git.kvack.org/~bcrl/aio-next	2013-12-22 11:03:49 -08:00
anon_inodes.c	…
attr.c	fs: fix iversion handling	2013-12-05 16:36:21 -06:00
bad_inode.c	…
binfmt_aout.c	…
binfmt_elf.c	fs: binfmt_elf: remove unused defines INTERPRETER_NONE and INTERPRETER_ELF	2014-01-23 16:36:58 -08:00
binfmt_elf_fdpic.c	…
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	block: Replace __this_cpu_ptr with raw_cpu_ptr	2013-12-03 19:19:41 -07:00
char_dev.c	…
compat.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
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	block: Abstract out bvec iterator	2013-11-23 22:33:47 -08:00
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.c	fs: __fget_light() can use __fget() in slow path	2014-01-25 03:14:38 -05:00
file_table.c	…
filesystems.c	…
fs-writeback.c	writeback: Fix data corruption on NFS	2013-12-14 04:21:26 +08:00
fs_struct.c	…
inode.c	…
internal.h	…
ioctl.c	…
ioprio.c	…
libfs.c	consolidate simple ->d_delete() instances	2013-11-15 22:04:17 -05:00
locks.c	…
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	block: Abstract out bvec iterator	2013-11-23 22:33:47 -08:00
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	seq_file: always clear m->count when we free m->buf	2013-11-18 19:07:53 -08:00
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	…