01 Oct, 2006
40 commits
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This patch vectorizes aio_read() and aio_write() methods to prepare for
collapsing all aio & vectored operations into one interface - which is
aio_read()/aio_write().Signed-off-by: Badari Pulavarty
Signed-off-by: Christoph Hellwig
Cc: Michael Holzheu
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
When a file system becomes fragmented (using MythTV, for example), the
bigalloc window searching ends up causing huge performance problems. In a
file system presented by a user experiencing this bug, the file system was
90% free, but no 32-block free windows existed on the entire file system.
This causes the allocator to scan the entire file system for each 128k
write before backing down to searching for individual blocks.In the end, finding a contiguous window for all the blocks in a write is an
advantageous special case, but one that can be found naturally when such a
window exists anyway.This patch removes the bigalloc window searching, and has been proven to
fix the test case described above.Signed-off-by: Jeff Mahoney
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The other common disk-based file systems (I checked ext[23], xfs, jfs)
check to ensure that opens of files > 2 GB fail unless O_LARGEFILE is
specified. They check via generic_file_open or their own open routine.ReiserFS doesn't have an f_op->open defined, and as such, it's possible to
open files > 2 GB without O_LARGEFILE.This patch adds the f_op->open member to conform with the expected
behavior.Signed-off-by: Jeff Mahoney
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This is the patch the three previous ones have been leading up to.
It changes the behavior of ReiserFS from loading and caching all the bitmaps
as special, to treating the bitmaps like any other bit of metadata and just
letting the system-wide caches figure out what to hang on to.Buffer heads are allocated on the fly, so there is no need to retain pointers
to all of them. The caching of the metadata occurs when the data is read and
updated, and is considered invalid and uncached until then.I needed to remove the vs-4040 check for performing a duplicate operation on a
particular bit. The reason is that while the other sites for working with
bitmaps are allowed to schedule, is_reusable() is called from do_balance(),
which will panic if a schedule occurs in certain places.The benefit of on-demand bitmaps clearly outweighs a sanity check that depends
on a compile-time option that is discouraged.[akpm@osdl.org: warning fix]
Signed-off-by: Jeff Mahoney
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch moves the bitmap loading code from super.c to bitmap.c
The code is also restructured somewhat. The only difference between new
format bitmaps and old format bitmaps is where they are. That's a two liner
before loading the block to use the correct one. There's no need for an
entirely separate code path.The load path is generally the same, with the pattern being to throw out a
bunch of requests and then wait for them, then cache the metadata from the
contents.Again, like the previous patches, the purpose is to set up for later ones.
Update: There was a bug in the previously posted version of this that resulted
in corruption. The problem was that bitmap 0 on new format file systems must
be treated specially, and wasn't. A stupid bug with an easy fix.This is hopefully the last fix for the disaster that is the reiserfs bitmap
patch set.If a bitmap block was full, first_zero_hint would end up at zero since it
would never be changed from it's zeroed out value. This just sets it
beyond the end of the bitmap block. If any bits are freed, it will be
reset to a valid bit. When info->free_count = 0, then we already know it's
full.Signed-off-by: Jeff Mahoney
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Similar to the SB_JOURNAL cleanup that was accepted a while ago, this patch
uses a temporary variable for buffer head references from the bitmap info
array.This makes the code much more readable in some areas.
It also uses proper reference counting, doing a get_bh() after using the
pointer from the array and brelse()'ing it later. This may seem silly, but a
later patch will replace the simple temporary variables with an actual read,
so the reference freeing will be used then.Signed-off-by: Jeff Mahoney
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
There is a check in is_reusable to determine if a particular block is a bitmap
block. It verifies this by going through the array of bitmap block buffer
heads and comparing the block number to each one.Bitmap blocks are at defined locations on the disk in both old and current
formats. Simply checking against the known good values is enough.This is a trivial optimization for a non-production codepath, but this is the
first in a series of patches that will ultimately remove the buffer heads from
that array.Signed-off-by: Jeff Mahoney
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
With 2.6.18-rc4-mm2, now wall_jiffies will always be the same as jiffies.
So we can kill wall_jiffies completely.This is just a cleanup and logically should not change any real behavior
except for one thing: RTC updating code in (old) ppc and xtensa use a
condition "jiffies - wall_jiffies == 1". This condition is never met so I
suppose it is just a bug. I just remove that condition only instead of
kill the whole "if" block.[heiko.carstens@de.ibm.com: s390 build fix and cleanup]
Signed-off-by: Atsushi Nemoto
Cc: Andi Kleen
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Russell King
Cc: Ian Molton
Cc: Mikael Starvik
Cc: David Howells
Cc: Yoshinori Sato
Cc: Hirokazu Takata
Cc: Ralf Baechle
Cc: Kyle McMartin
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: Chris Zankel
Cc: "Luck, Tony"
Cc: Geert Uytterhoeven
Cc: Roman Zippel
Signed-off-by: Heiko Carstens
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch contains the following possible cleanups:
- make the following needlessly global function static:
- ntp_update_frequency()
- make the following needlessly global variables static:
- time_state
- time_offset
- time_constant
- time_reftime
- remove the following read-only global variable:
- time_precisionSigned-off-by: Adrian Bunk
Cc: Roman Zippel
Cc: john stultz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Remove a few unused defines and remove obsolete information from comments.
Signed-off-by: Roman Zippel
Cc: john stultz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This converts the kernel ntp model into a model which matches the nanokernel
reference implementations. The previous patches already increased the
resolution and precision of the computations, so that this conversion becomes
quite simple.explains:
The original NTP kernel interface was defined in units of microseconds.
That's what Linux implements. As computers have gotten faster and can now
split microseconds easily, a new kernel interface using nanosecond units was
defined ("the nanokernel", confusing as that name is to OS hackers), and
there's an STA_NANO bit in the adjtimex() status field to tell the application
which units it's using.The current ntpd supports both, but Linux loses some possible timing
resolution because of quantization effects, and the ntpd hackers would really
like to be able to drop the backwards compatibility code.Ulrich Windl has been maintaining a patch set to do the conversion for years,
but it's hard to keep in sync.Signed-off-by: Roman Zippel
Cc: john stultz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This converts time_freq to a scaled nsec value and adds around 6bit of extra
resolution. This pushes the time_freq to its 32bit limits so the calculatons
have to be done with 64bit.Signed-off-by: Roman Zippel
Cc: john stultz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
time_tolerance isn't changed at all in the kernel, so simply remove it, this
simplifies the next patch, as it avoids a number of conversions.Signed-off-by: Roman Zippel
Cc: john stultz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This folds update_ntp_one_tick() into second_overflow() and adds time_adjust
to the tick length, this makes time_next_adjust unnecessary. This slightly
changes the adjtime() behaviour, instead of applying it to the next tick, it's
applied to the next second.Signed-off-by: Roman Zippel
Cc: john stultz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This converts time_offset into a scaled per tick value. This avoids now
completely the crude compensation in second_overflow().Signed-off-by: Roman Zippel
Cc: john stultz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This adds the frequency part to ntp_update_frequency().
Signed-off-by: Roman Zippel
Cc: john stultz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This makes time_adj local to second_overflow() and integrates it into the tick
length instead of adding it everytime.Signed-off-by: Roman Zippel
Cc: john stultz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This introduces ntp_update_frequency() and deinlines ntp_clear() (as it's not
performance critical). ntp_update_frequency() calculates the base tick length
using tick_usec and adds a base adjustment, in case the frequency doesn't
divide evenly by HZ.Signed-off-by: Roman Zippel
Cc: john stultz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Move all the NTP related code to ntp.c
[akpm@osdl.org: cleanups, build fix]
Signed-off-by: John Stultz
Cc: Ingo Molnar
Cc: Roman Zippel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The lock annotation macros __acquires, __releases, __acquire, and __release
all currently throw away the lock expression passed as an argument. Now
that sparse can parse __context__ and __attribute__((context)) with a
context expression, pass the lock expression down to sparse as the context
expression. This requires a version of sparse from GIT commit
37475a6c1c3e66219e68d912d5eb833f4098fd72 or later.Signed-off-by: Josh Triplett
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
If the driver has interrupts available to it, there is really no reason to
have a kernel daemon push the IPMI state machine.Note that I have experienced machines where the interrupts do not work
correctly. This was a long time ago and hopefully things are better now.
If some machines still have broken interrupts, a blacklist will need to be
added.Signed-off-by: Corey Minyard
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This syncs the omap_cf driver with the one from the linux-omap tree. Changes
include fixing build warnings (section mismatch, unused return value) and
coping with various pcmcia core changes related to managing i/o memory and irq
resources.Signed-off-by: David Brownell
Cc: Dominik Brodowski
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Check return value of sysfs_create_bin_file(). Fix polarity of
RTC_BATT_FLAG bit in DS1742.Signed-off-by: Atsushi Nemoto
Cc: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This lets the at91rm9200 RTC alarm be a system wakeup irq, according to the
setting of /sys/devices/platform/at91_rtc/power/wakeup. User code can set the
alarm, put the system into a low power mode, and then rely on it waking up no
later than the specified moment.Signed-off-by: David Brownell
Cc: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Update RTC framework so that drivers can constify their method tables, moving
them from ".data" to ".rodata". Then update the drivers.Signed-off-by: David Brownell
Cc: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The rtc_is_valid_tm() routine needs to treat some of the fields it checks as
unsigned, to prevent wrongly accepting invalid rtc_time structs; this is the
same approach used elsewhere in the RTC code for such tests.Conversely, rtc_proc_show() is missing one invalid-day-of-month test that
rtc_is_valid_tm() makes: there is no day zero.Signed-off-by: David Brownell
Cc: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This makes RTC core components use "subsys_init" instead of "module_init", as
appropriate for subsystem infrastructure. This is mostly useful for
statically linking drivers in other parts of the tree that may provide an RTC
interface as a secondary functionality (e.g. part of a multifunction chip);
they won't need to worry so much about drivers/Makefile link order.Signed-off-by: David Brownell
Cc: Alessandro Zummo
Acked-by: Oleg Verych
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Small updates to make the RTC class Kconfig text be more informative. This
should help folk used to the drivers/char/rtc.c support, or a single RTC, be
slightly less surprised by the differences.Also, adds a new RTC_DEBUG option to predefine DEBUG in the framework and its
drivers, while debugging. That's getting to be a standard idiom, and it's
pretty useful.Signed-off-by: David Brownell
Cc: Alessandro Zummo
Acked-by: Oleg Verych
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
SYSCTL should still depend on EMBEDDED. This unbreaks the EMBEDDED menu
(from the recent SYSCTL_SYCALL menu option patch).Fix typos in new SYSCTL_SYSCALL menu.
Signed-off-by: Randy Dunlap
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The century bit PCF8563_MO_C in the month register is misinterpreted. It
is set to 1 for the 20th century and 0 for 21th, and the driver is
expecting the opposite behavior.Acked-by: Alessandro Zummo
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The driver is allocating a page but doesn't actually use it for anything.
(History from the old ->write method before Linus cleaned it up)
Signed-off-by: Jiri Slaby
Acked-by: Alan Cox
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
All on stack DECLARE_COMPLETIONs should be replaced by:
DECLARE_COMPLETION_ONSTACKSigned-off-by: Peter Zijlstra
Acked-by: Ingo Molnar
Acked-by: Benjamin Herrenschmidt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Looks like the probe function always gets a valid pdev, and checking it
after dereferencing it is pretty useless. This patch removes the check
(cid #1365)Signed-off-by: Eric Sesterhenn
Cc: Alessandro Zummo
Cc: Raphael Assenat
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
BUG_ON() does this unlikely check itself, as bugs in Linux are unlikely
anyway :)Signed-off-by: Rolf Eike Beer
Acked-by: Zach Brown
Acked-by: Benjamin LaHaise
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Address some simple typos in rt-mutex-design.txt It also changes the
indentation of the cmpxchg example (the cmpxchg example was indented by
spaces, while all other code snippets were indented by tabs).Acked-by: Steven Rostedt
Signed-off-by: Jan Altenberg
Acked-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Support hdaps on Lenovo ThinkPad T60. It was tested with pivot utility
from http://www.kernel.org/pub/linux/kernel/people/rml/hdaps and it seems
to be OK.Cc: Jean Delvare
Cc: Greg Kroah-Hartman
Cc: Robert Love
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This fixes two off by ones in the mwave driver, found
via find -iname \*.[ch] | xargs grep "> ARRAY_SIZE("Signed-off-by: Eric Sesterhenn
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Switch trident to use pci_get/put_dev properly. Also fix a bug where the
driver erroneously passed pdev not NULL to a second search. This happened
to always work except with pci=reverse because of chip ordering.Signed-off-by: Alan Cox
Signed-off-by: Muli Ben-Yehuda
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
SysRq : Emergency Sync
Emergency Sync complete
SysRq : Emergency Remount R/O
Emergency Remount complete
SysRq : Resetting
BUG: warning at kernel/lockdep.c:1816/trace_hardirqs_on() (Not tainted)Call Trace:
[] show_trace+0xae/0x319
[] dump_stack+0x15/0x17
[] trace_hardirqs_on+0xbc/0x13d
[] sysrq_handle_reboot+0x9/0x11
[] __handle_sysrq+0x99/0x130
[] handle_sysrq+0x17/0x19
[] kbd_event+0x32e/0x57d
[] input_event+0x42d/0x45b
[] atkbd_interrupt+0x44d/0x53d
[] serio_interrupt+0x49/0x86
[] i8042_interrupt+0x202/0x21a
[] handle_IRQ_event+0x2c/0x64
[] __do_IRQ+0xaf/0x114
[] do_IRQ+0xf8/0x107
[] ret_from_intr+0x0/0xf
DWARF2 unwinder stuck at ret_from_intr+0x0/0xf
Leftover inexact backtrace:
[] mwait_idle+0x3f/0x54
[] cpu_idle+0xa2/0xc5
[] rest_init+0x2b/0x2d
[] start_kernel+0x24a/0x24c
[] _sinittext+0x28b/0x292Since we're shutting down anyway, don't bother being smart,
just turn the thing off.Signed-off-by: Peter Zijlstra
Acked-by: Ingo Molnar
Cc: Arjan van de Ven
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Alan Cox
Cc: Dominik Brodowski
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
