19 Oct, 2007
40 commits
-
Add necessary protocol changes for supplying a file handle with the getattr
operation. Step the API version to 7.9.This patch doesn't actually supply the file handle, because that needs some
kind of VFS support, which we haven't yet been able to agree upon.[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Miklos Szeredi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Getattr and lookup operations can be running in parallel to attribute changing
operations, such as write and setattr.This means, that if for example getattr was slower than a write, the cached
size attribute could be set to a stale value.To prevent this race, introduce a per-filesystem attribute version counter.
This counter is incremented whenever cached attributes are modified, and the
incremented value stored in the inode.Before storing new attributes in the cache, getattr and lookup check, using
the version number, whether the attributes have been modified during the
request's lifetime. If so, the returned attributes are not cached, because
they might be stale.Thanks to Jakub Bogusz for the bug report and test program.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Miklos Szeredi
Cc: Jakub Bogusz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The following operation didn't check if sending the request was allowed:
setattr
listxattr
statfsSome other operations don't explicitly do the check, but VFS calls
->permission() which checks this.Signed-off-by: Miklos Szeredi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
setup_new_group_blocks() manipulates the group descriptor block bh under
the block_bitmap bh's lock. It shouldn't matter since nobody but resize
should be touching these blocks, but it's worth fixing up.Signed-off-by: Eric Sandeen
C:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch set supports large block size(>4k,
Signed-off-by: Mingming Cao
Cc:
Acked-by: Christoph Lameter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Remove the hardcoded value 256 in fs/cramfs/inode.c and replaces it with
CRAMFS_MAXPATHLEN.Tested on an i386 box.
Signed-off-by: Andi Drebes
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Remove a variable that is never read.
Signed-off-by: Andi Drebes
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Convert bit_spin_lock to new locking bitops. Slub can use the non-atomic
store version to clear (Christoph?)Signed-off-by: Nick Piggin
Cc: Christoph Lameter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add non-trivial lock bitops implementation for powerpc.
Signed-off-by: Nick Piggin
Acked-by: Benjamin Herrenschmidt
Cc: Paul Mackerras
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
mips can avoid one mb when acquiring a lock with test_and_set_bit_lock.
Signed-off-by: Nick Piggin
Cc: Ralf Baechle
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Documentation/atomic_ops.txt defines these primitives must contain a memory
barrier both before and after their memory operation. This is consistent with
the atomic ops implementation on mips.Signed-off-by: Nick Piggin
Cc: Ralf Baechle
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Convert ia64 to new bitops.
Signed-off-by: Nick Piggin
Cc: "Luck, Tony"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Alpha can avoid one mb when acquiring a lock with test_and_set_bit_lock.
[bunk@kernel.org: alpha bitops.h must #include ]
Signed-off-by: Nick Piggin
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Signed-off-by: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Documentation/atomic_ops.txt defines these primitives must contain a memory
barrier both before and after their memory operation. This is consistent with
the atomic ops implementation on alpha.Signed-off-by: Nick Piggin
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Introduce test_and_set_bit_lock / clear_bit_unlock bitops with lock semantics.
Convert all architectures to use the generic implementation.Signed-off-by: Nick Piggin
Acked-By: David Howells
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Russell King
Cc: Haavard Skinnemoen
Cc: Bryan Wu
Cc: Mikael Starvik
Cc: David Howells
Cc: Yoshinori Sato
Cc: "Luck, Tony"
Cc: Hirokazu Takata
Cc: Geert Uytterhoeven
Cc: Roman Zippel
Cc: Greg Ungerer
Cc: Ralf Baechle
Cc: Kyle McMartin
Cc: Matthew Wilcox
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: Heiko Carstens
Cc: Martin Schwidefsky
Cc: Paul Mundt
Cc: Kazumoto Kojima
Cc: Richard Curnow
Cc: William Lee Irwin III
Cc: "David S. Miller"
Cc: Jeff Dike
Cc: Paolo 'Blaisorblade' Giarrusso
Cc: Miles Bader
Cc: Andi Kleen
Cc: Chris Zankel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
msr_class_cpu_callback() can be marked __cpuinit, being the notifier callback
for a __cpuinitdata notifier_block. So can be marked msr_device_create() too,
called only from the newly-__cpuinit msr_class_cpu_callback() or from
__init-marked msr_init().Signed-off-by: Satyam Sharma
Cc: Andi Kleen
Acked-by: H. Peter Anvin
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The return of the present "do {} while" based stub definition of
register_hotcpu_notifier() cannot be checked. This makes the stub
asymmetric w.r.t. the real HOTPLUG_CPU=y implementation that is
int-returning. So let us redefine this to be consistent with the full
version. Also do the same for unregister_hotcpu_notifier().We cannot define these as static inline functions due to an existing GCC
bug (#33172). So define as macros that return appropriately instead (int
'0' for the register_hotcpu_notifier case and void for
unregister_hotcpu_notifier).Signed-off-by: Satyam Sharma
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This adds POWERPC specific hooks for scaled time accounting.
POWER6 includes a SPURR register. The SPURR is based off the PURR register
but is scaled based on CPU frequency and issue rates. This gives a more
accurate account of the instructions used per task. The PURR and timebase
will be constant relative to the wall clock, irrespective of the CPU
frequency.This implementation reads the SPURR register in account_system_vtime which
is only call called on context witch and hard and soft irq entry and exit.
The percentage of user and system time is then estimated using the ratio of
these accounted by the PURR. If the SPURR is not present, the PURR read.An earlier implementation of this patch read the SPURR whenever the PURR
was read, which included the system call entry and exit path.
Unfortunately this showed a performance regression on lmbench runs, so was
re-implemented.I've included the lmbench results here when run bare metal on POWER6. 1st
column is the unpatch results. 2nd column is the results using the below
patch and the 3rd is the % diff of these results from the base. 4th and
5th columns are the results and % differnce from the base using the older
patch (SPURR read in syscall entry/exit path).Base Scaled-Acct SPURR-in-syscall
Result Result % diff Result % diff
Simple syscall: 0.3086 0.3086 0.0000 0.3452 11.8600
Simple read: 0.4591 0.4671 1.7425 0.5044 9.86713
Simple write: 0.4364 0.4366 0.0458 0.4731 8.40971
Simple stat: 2.0055 2.0295 1.1967 2.0669 3.06158
Simple fstat: 0.5962 0.5876 -1.442 0.6368 6.80979
Simple open/close: 3.1283 3.1009 -0.875 3.2088 2.57328
Select on 10 fd's: 0.8554 0.8457 -1.133 0.8667 1.32101
Select on 100 fd's: 3.5292 3.6329 2.9383 3.6664 3.88756
Select on 250 fd's: 7.9097 8.1881 3.5197 8.2242 3.97613
Select on 500 fd's: 15.2659 15.836 3.7357 15.873 3.97814
Select on 10 tcp fd's: 0.9576 0.9416 -1.670 0.9752 1.83792
Select on 100 tcp fd's: 7.248 7.2254 -0.311 7.2685 0.28283
Select on 250 tcp fd's: 17.7742 17.707 -0.375 17.749 -0.1406
Select on 500 tcp fd's: 35.4258 35.25 -0.496 35.286 -0.3929
Signal handler installation: 0.6131 0.6075 -0.913 0.647 5.52927
Signal handler overhead: 2.0919 2.1078 0.7600 2.1831 4.35967
Protection fault: 0.7345 0.7478 1.8107 0.8031 9.33968
Pipe latency: 33.006 16.398 -50.31 33.475 1.42368
AF_UNIX sock stream latency: 14.5093 30.910 113.03 30.715 111.692
Process fork+exit: 219.8 222.8 1.3648 229.37 4.35623
Process fork+execve: 876.14 873.28 -0.32 868.66 -0.8533
Process fork+/bin/sh -c: 2830 2876.5 1.6431 2958 4.52296
File /var/tmp/XXX write bw: 1193497 1195536 0.1708 118657 -0.5799
Pagefaults on /var/tmp/XXX: 3.1272 3.2117 2.7020 3.2521 3.99398Also, kernel compile times show no difference with this patch applied.
[pbadari@us.ibm.com: Avoid unnecessary PURR reading]
Signed-off-by: Michael Neuling
Cc: Balbir Singh
Cc: Jay Lan
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Signed-off-by: Badari Pulavarty
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This moves the new items to the end of the taskstats struct as
requested by Balbir and yourself.Cc: Balbir Singh
Cc: Jay Lan
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This adds items to the taststats struct to account for user and system
time based on scaling the CPU frequency and instruction issue rates.Adds account_(user|system)_time_scaled callbacks which architectures
can use to account for time using this mechanism.Signed-off-by: Michael Neuling
Cc: Balbir Singh
Cc: Jay Lan
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Found these while looking at printk uses.
Add missing newlines to dev_ uses
Add missing KERN_ prefixes to multiline dev_s
Fixed a wierd->weird spelling typo
Added a newline to a printkSigned-off-by: Joe Perches
Cc: "Luck, Tony"
Cc: Jens Axboe
Cc: Mark M. Hoffman
Cc: Roland Dreier
Cc: Tilman Schmidt
Cc: David Woodhouse
Cc: Jeff Garzik
Cc: Stephen Hemminger
Cc: Greg KH
Cc: Jeremy Fitzhardinge
Cc: Geert Uytterhoeven
Cc: Alessandro Zummo
Cc: David Brownell
Cc: James Smart
Cc: Andrew Vasquez
Cc: "Antonino A. Daplas"
Cc: Evgeniy Polyakov
Cc: Russell King
Cc: Jaroslav Kysela
Cc: Takashi Iwai
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Jiri Slaby
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
if (controller && !request_region) then we leaked a tty driver struct, fix it
by adding function deinit tail with goto-ing into it (and from other fail
paths too)Signed-off-by: Jiri Slaby
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
We may use pdev->revision instead of reading pci config space directly, so
remove pci_read_config_dword invoking.Signed-off-by: Jiri Slaby
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Jiri Slaby
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
- register_device unconditionally (non-pci dependent) to have also isa
devices in /dev
- unregister devices on module removal
- don't set TTY_DRIVER_DYNAMIC_DEV twice (removed the one dependent on some
macro)Signed-off-by: Jiri Slaby
Cc: Ferenc Wagner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
rocket, switch sleep_on to completion
- sleep_on is deprecated and racy, use completion instead
- also check retval of interruptible function and return ERESTARTSYS
eventuallySigned-off-by: Jiri Slaby
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
interruptible_sleep_on is deprecated, use completion instead
Signed-off-by: Jiri Slaby
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
prepend moxa_ to all moxa functions which laxes this
Signed-off-by: Jiri Slaby
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
- use dev_* where pdev is available (probe function)
- add some printks on fail paths
- add KERN_ macros otherwise
- remove useless verbose variable
- wrap lines to 80 cols at mostSigned-off-by: Jiri Slaby
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
CC drivers/char/cyclades.o
drivers/char/cyclades.c: In function 'cy_init':
drivers/char/cyclades.c:5488: warning: label 'err_unr' defined but not usedSigned-off-by: Jesper Juhl
Acked-by: Jiri Slaby
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Most of them are signedness, the rest unused function parameters.
Signed-off-by: Jiri Slaby
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Lock whole processing in isr, avoid error-prone locking/unlocking in rx/tx
esp. On fail paths (there was a bug in the past yet).Signed-off-by: Jiri Slaby
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Due to large indent the code was wrapped and unreadable. Create 3 function
instead of one and reorder the code, so it is readable now.Signed-off-by: Jiri Slaby
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The work done in bottom half doesn't cost much cpu time (e.g. tty_hangup
itself schedules its own bottom half), it's possible to do the work in isr
directly and save hence some .text.Signed-off-by: Jiri Slaby
Cc: Alan Cox
Cc: Paul Fulghum
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
moxa, fix and optimise empty timer
don't wait and delete empty timer in empty timer function. Also fire next
empty timer at rounded jiffies to save power.Signed-off-by: Jiri Slaby
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch contains the next round of scheduled OSS code removal.
Signed-off-by: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Daniel Walker
Cc: Thomas Gleixner
Cc: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Daniel Walker
Cc: Thomas Gleixner
Cc: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Daniel Walker
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
