17 Mar, 2008
4 commits
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If subbuf_pages was larger than the max number of pages the pipe
buffer will hold, subbuf_splice_actor() would happily go beyond
the array size.Signed-off-by: Jens Axboe
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no longer working for some time.
A driver that had been marked as BROKEN for such a long time seems to be
unlikely to be revived in the forseeable future.But if anyone wants to ever revive this driver, the code is still present in
the older kernel releases.Signed-off-by: Adrian Bunk
Acked-by: Alan Cox
Cc: Jens Axboe
Signed-off-by: Andrew Morton
Signed-off-by: Jens Axboe -
* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6:
[PARISC] make ptr_to_pide() static
[PARISC] head.S: section mismatch fixes
[PARISC] add back Crestone Peak cpu
[PARISC] futex: special case cmpxchg NULL in kernel space
[PARISC] clean up show_stack
[PARISC] add pa8900 CPUs to hardware inventory
[PARISC] clean up include/asm-parisc/elf.h
[PARISC] move defconfig to arch/parisc/configs/
[PARISC] add back AD1889 MAINTAINERS entry
[PARISC] pdc_console: fix bizarre panic on boot
[PARISC] dump_stack in show_regs
[PARISC] pdc_stable: fix compile errors
[PARISC] remove unused pdc_iodc_printf function
[PARISC] bump __NR_syscalls
[PARISC] unbreak pgalloc.h
[PARISC] move VMALLOC_* definitions to fixmap.h
[PARISC] wire up timerfd syscalls
[PARISC] remove old timerfd syscall
16 Mar, 2008
21 commits
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Signed-off-by: FUJITA Tomonori
Signed-off-by: Kyle McMartin -
- move boot_args[] into the init section
- move $global$ into the read_mostly section
- fix the following two section mismatches:
WARNING: vmlinux.o(.text+0x9c): Section mismatch: reference to .init.text:start_kernel (between '$pgt_fill_loop' and '$is_pa20')
WARNING: vmlinux.o(.text+0xa0): Section mismatch: reference to .init.text:start_kernel (between '$pgt_fill_loop' and '$is_pa20')Signed-off-by: Helge Deller
SIgned-off-by: Kyle McMartin -
Crestone Peak Slow is the 800MHz PA-8800 cpu in the C8000.
0x88B is probably the Crestone Peak Fast.Signed-off-by: Kyle McMartin
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Commit a0c1e9073ef7428a14309cba010633a6cd6719ea added code to futex.c
to detect whether futex_atomic_cmpxchg_inatomic was implemented at run
time:+ curval = cmpxchg_futex_value_locked(NULL, 0, 0);
+ if (curval == -EFAULT)
+ futex_cmpxchg_enabled = 1;This is bogus on parisc, since page zero in kernel virtual space is the
gateway page for syscall entry, and should not be read from the kernel.
(That, and we really don't like the kernel faulting on its own address
space...)Signed-off-by: Kyle McMartin
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When we show_regs, we obviously have a struct pt_regs of the calling
frame. Use these in show_stack so we don't have the entire bogus call trace
up to the show_stack call.Signed-off-by: Kyle McMartin
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This patch adds the known pa8900 CPUs to the inventory list and removes
the Crestone Peak one which apparently never escaped into the wild.Signed-off-by: James Bottomley
Signed-off-by: Kyle McMartin -
Cleanup some cruft. No functionality changes.
Signed-off-by: Randolph Chung
Signed-off-by: Kyle McMartin -
This patch moves the default parisc defconfig to
arch/parisc/configs/generic_defconfig where it belongs and selects it as
the default defconfig through KBUILD_DEFCONFIG.Signed-off-by: Adrian Bunk
Signed-off-by: Kyle McMartin -
Signed-off-by: Thibaut VARENE
Signed-off-by: Kyle McMartin -
Commit 721fdf34167580ff98263c74cead8871d76936e6 introduced a subtle bug
by accidently removing the "static" from iodc_dbuf. This resulted in, what
appeared to be, a trap without *current set to a task. Probably the result of
a trap in real mode while calling firmware.Also do other misc clean ups. Since the only input from firmware is non
blocking, share iodc_dbuf between input and output, and spinlock the
only callers.Signed-off-by: Kyle McMartin
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Originally, show_stack was used in BUG() output. However, a recent commit
changed it to print register state (no idea what that's supposed to help,
really...) and parisc was missing a backtrace because of it.Signed-off-by: Kyle McMartin
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Signed-off-by: Joel Soete
Signed-off-by: Kyle McMartin -
Signed-off-by: Kyle McMartin
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oops, forgot this in the previous commit.
Signed-off-by: Kyle McMartin
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Commit 2f569afd9ced9ebec9a6eb3dbf6f83429be0a7b4 broke the compile
rather spectacularly. Fix code errors.Signed-off-by: Kyle McMartin
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They make way more sense here, really...
Signed-off-by: Kyle McMartin
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Signed-off-by: Kyle McMartin
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Signed-off-by: Kyle McMartin
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This essentially reverts commit 71fc47a9adf8ee89e5c96a47222915c5485ac437
("ACPI: basic initramfs DSDT override support"), because the code simply
isn't ready.It did ugly things to the init sequence to populate the rootfs image
early, but that just ended up showing other problems with the whole
approach. The fact is, the VFS layer simply isn't initialized this
early, and the relevant ACPI code should either run much later, or this
shouldn't be done at all.For 2.6.25, we'll just pick the latter option. We can revisit this
concept later if necessary.Cc: Dave Hansen
Cc: Tilman Schmidt
Cc: Andrew Morton
Cc: Thomas Renninger
Cc: Eric Piel
Cc: Len Brown
Cc: Christoph Hellwig
Cc: Markus Gaugusch
Signed-off-by: Linus Torvalds -
DATA_CARRY is not boolean
Signed-off-by: Roel Kluin
Signed-off-by: Pierre Ossman
Signed-off-by: Linus Torvalds -
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
[NET]: Fix tbench regression in 2.6.25-rc1
15 Mar, 2008
10 commits
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Use the existing calc_delta_mine() calculation for sched_slice(). This
saves a divide and simplifies the code because we share it with the
other /cfs_rq->load users.It also improves code size:
text data bss dec hex filename
42659 2740 144 45543 b1e7 sched.o.before
42093 2740 144 44977 afb1 sched.o.afterSigned-off-by: Ingo Molnar
Signed-off-by: Peter Zijlstra -
Fair sleepers need to scale their latency target down by runqueue
weight. Otherwise busy systems will gain ever larger sleep bonus.Signed-off-by: Ingo Molnar
Signed-off-by: Peter Zijlstra -
Currently we schedule to the leftmost task in the runqueue. When the
runtimes are very short because of some server/client ping-pong,
especially in over-saturated workloads, this will cycle through all
tasks trashing the cache.Reduce cache trashing by keeping dependent tasks together by running
newly woken tasks first. However, by not running the leftmost task first
we could starve tasks because the wakee can gain unlimited runtime.Therefore we only run the wakee if its within a small
(wakeup_granularity) window of the leftmost task. This preserves
fairness, but does alternate server/client task groups.Signed-off-by: Peter Zijlstra
Signed-off-by: Ingo Molnar -
lw->weight can be 0 for a short time during bootup.
Signed-off-by: Ingo Molnar
Signed-off-by: Peter Zijlstra -
Clear the cached inverse value when updating load. This is needed for
calc_delta_mine() to work correctly when using the rq load.Signed-off-by: Ingo Molnar
Signed-off-by: Peter Zijlstra -
Current min_vruntime tracking is incorrect and will cause serious
problems when we don't run the leftmost task for some reason.min_vruntime does two things; 1) it's used to determine a forward
direction when the u64 vruntime wraps, 2) it's used to track the
leftmost vruntime to position newly enqueued tasks from.The current logic advances min_vruntime whenever the current task's
vruntime advance. Because the current task may pass the leftmost task
still waiting we're failing the second goal. This causes new tasks to be
placed too far ahead and thus penalizes their runtime.Fix this by making min_vruntime the min_vruntime of the waiting tasks by
tracking it in enqueue/dequeue, and compare against current's vruntime
to obtain the absolute minimum when placing new tasks.Signed-off-by: Peter Zijlstra
Signed-off-by: Ingo Molnar -
Fix a hard to trigger crash seen in the -rt kernel that also affects
the vanilla scheduler.There is a race condition between schedule() and some dequeue/enqueue
functions; rt_mutex_setprio(), __setscheduler() and sched_move_task().When scheduling to idle, idle_balance() is called to pull tasks from
other busy processor. It might drop the rq lock. It means that those 3
functions encounter on_rq=0 and running=1. The current task should be
put when running.Here is a possible scenario:
CPU0 CPU1
| schedule()
| ->deactivate_task()
| ->idle_balance()
| -->load_balance_newidle()
rt_mutex_setprio() |
| --->double_lock_balance()
*get lock *rel lock
* on_rq=0, ruuning=1 |
* sched_class is changed |
*rel lock *get lock
: |
:
->put_prev_task_rt()
->pick_next_task_fair()
=> panicThe current process of CPU1(P1) is scheduling. Deactivated P1, and the
scheduler looks for another process on other CPU's runqueue because CPU1
will be idle. idle_balance(), load_balance_newidle() and
double_lock_balance() are called and double_lock_balance() could drop
the rq lock. On the other hand, CPU0 is trying to boost the priority of
P1. The result of boosting only P1's prio and sched_class are changed to
RT. The sched entities of P1 and P1's group are never put. It makes
cfs_rq invalid, because the cfs_rq has curr and no leaf, but
pick_next_task_fair() is called, then the kernel panics.Signed-off-by: Hiroshi Shimamoto
Signed-off-by: Peter Zijlstra
Signed-off-by: Ingo Molnar -
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
firewire: fw-ohci: shut up false compiler warning on PPC32
firewire: fw-ohci: use dma_alloc_coherent for ar_buffer
ieee1394: sbp2: fix for SYM13FW500 bridge (Datafab disk)
firewire: fw-sbp2: fix for SYM13FW500 bridge (Datafab disk)
firewire: update Kconfig help text
firewire: warn on fatal condition in topology code
firewire: fw-sbp2: set single-phase retry_limit
firewire: fw-ohci: Apple UniNorth 1st generation support
firewire: fw-ohci: PPC PMac platform code
firewire: endianess annotations
firewire: endianess fix -
This bug was always here, but before my commit 6fa02839bf9412e18e77
("recheck for secure ports in fh_verify"), it could only be triggered by
failure of a kmalloc(). After that commit it could be triggered by a
client making a request from a non-reserved port for access to an export
marked "secure". (Exports are "secure" by default.)The result is a struct svc_export with a reference count one too low,
resulting in likely oopses next time the export is accessed.The reference counting here is not straightforward; a later patch will
clean up fh_verify().Thanks to Lukas Hejtmanek for the bug report and followup.
Signed-off-by: J. Bruce Fields
Cc: Lukas Hejtmanek
Signed-off-by: Linus Torvalds -
The comments in the definition of struct export_operations don't match the
current members.Add a comment for the 2 new functions and remove 2 comments for unused ones.
Signed-off-by: Marc Dionne
Acked-by: David Howells
Acked-by: Christoph Hellwig
Signed-off-by: Linus Torvalds
14 Mar, 2008
5 commits
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Shut up "may be used uninitialised in this function" warnings due to
PPC32's implementation of dma_alloc_coherent().Signed-off-by: Stefan Richter
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Currently, we do nothing to guarantee we have a consistent DMA buffer for
asynchronous receive packets. Rather than doing several sync's following a
dma_map_single() to get consistent buffers, just switch to using
dma_alloc_coherent().Resolves constant buffer failures on my own x86_64 laptop w/4GB of RAM and
likely to fix a number of other failures witnessed on x86_64 systems with
4GB of RAM or more.Signed-off-by: Jarod Wilson
Signed-off-by: Stefan Richter -
Fix I/O errors due to SYM13FW500's inability to handle larger request
sizes. Reported by Piergiorgio Sartor for
firewire-sbp2 in https://bugzilla.redhat.com/show_bug.cgi?id=436879This fix is necessary because sbp2's default request size limit has been
lifted since 2.6.25-rc1.Signed-off-by: Stefan Richter
Signed-off-by: Jarod Wilson -
Fix I/O errors due to SYM13FW500's inability to handle larger request
sizes. Reported by Piergiorgio Sartor in
https://bugzilla.redhat.com/show_bug.cgi?id=436879Signed-off-by: Stefan Richter
Signed-off-by: Jarod Wilson -
Remove some less necessary information, point out that video1394 and
dv1394 should be blacklisted along with ohci1394.Signed-off-by: Stefan Richter
