25 May, 2011
5 commits
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Most arches define CONFIG_DEBUG_STACK_USAGE exactly the same way. Move it
to lib/Kconfig.debug so each arch doesn't have to define it. This
obviously makes the option generic, but that's fine because the config is
already used in generic code.It's not obvious to me that sysrq-P actually does anything caution by
keeping the most inclusive wording.Signed-off-by: Stephen Boyd
Cc: Chris Metcalf
Acked-by: David S. Miller
Acked-by: Richard Weinberger
Acked-by: Mike Frysinger
Cc: Russell King
Cc: Hirokazu Takata
Acked-by: Ralf Baechle
Cc: Paul Mackerras
Acked-by: Benjamin Herrenschmidt
Cc: Chen Liqin
Cc: Lennox Wu
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: "H. Peter Anvin"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fold all the mmu_gather rework patches into one for submission
Signed-off-by: Peter Zijlstra
Reported-by: Hugh Dickins
Cc: Benjamin Herrenschmidt
Cc: David Miller
Cc: Martin Schwidefsky
Cc: Russell King
Cc: Paul Mundt
Cc: Jeff Dike
Cc: Richard Weinberger
Cc: Tony Luck
Cc: KAMEZAWA Hiroyuki
Cc: Mel Gorman
Cc: KOSAKI Motohiro
Cc: Nick Piggin
Cc: Namhyung Kim
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Rework the sparc mmu_gather usage to conform to the new world order :-)
Sparc mmu_gather does two things:
- tracks vaddrs to unhash
- tracks pages to freeSplit these two things like powerpc has done and keep the vaddrs
in per-cpu data structures and flush them on context switch.The remaining bits can then use the generic mmu_gather.
Signed-off-by: Peter Zijlstra
Acked-by: David Miller
Cc: Benjamin Herrenschmidt
Cc: Martin Schwidefsky
Cc: Russell King
Cc: Paul Mundt
Cc: Jeff Dike
Cc: Richard Weinberger
Cc: Tony Luck
Cc: KAMEZAWA Hiroyuki
Cc: Hugh Dickins
Cc: Mel Gorman
Cc: KOSAKI Motohiro
Cc: Nick Piggin
Cc: Namhyung Kim
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Architectures that implement their own show_mem() function did not pass
the filter argument to show_free_areas() to appropriately avoid emitting
the state of nodes that are disallowed in the current context. This patch
now passes the filter argument to show_free_areas() so those nodes are now
avoided.This patch also removes the show_free_areas() wrapper around
__show_free_areas() and converts existing callers to pass an empty filter.ia64 emits additional information for each node, so skip_free_areas_zone()
must be made global to filter disallowed nodes and it is converted to use
a nid argument rather than a zone for this use case.Signed-off-by: David Rientjes
Cc: Russell King
Cc: Tony Luck
Cc: Fenghua Yu
Cc: Kyle McMartin
Cc: Helge Deller
Cc: James Bottomley
Cc: "David S. Miller"
Cc: Guan Xuetao
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
* 'for-2.6.40' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
percpu: Unify input section names
percpu: Avoid extra NOP in percpu_cmpxchg16b_double
percpu: Cast away printk format warning
percpu: Always align percpu output section to PAGE_SIZEFix up fairly trivial conflict in arch/x86/include/asm/percpu.h as per Tejun
24 May, 2011
1 commit
23 May, 2011
2 commits
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* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6: (28 commits)
sparc32: fix build, fix missing cpu_relax declaration
SCHED_TTWU_QUEUE is not longer needed since sparc32 now implements IPI
sparc32,leon: Remove unnecessary page_address calls in LEON DMA API.
sparc: convert old cpumask API into new one
sparc32, sun4d: Implemented SMP IPIs support for SUN4D machines
sparc32, sun4m: Implemented SMP IPIs support for SUN4M machines
sparc32,leon: Implemented SMP IPIs for LEON CPU
sparc32: implement SMP IPIs using the generic functions
sparc32,leon: SMP power down implementation
sparc32,leon: added some SMP comments
sparc: add {read,write}*_be routines
sparc32,leon: don't rely on bootloader to mask IRQs
sparc32,leon: operate on boot-cpu IRQ controller registers
sparc32: always define boot_cpu_id
sparc32: removed unused code, implemented by generic code
sparc32: avoid build warning at mm/percpu.c:1647
sparc32: always register a PROM based early console
sparc32: probe for cpu info only during startup
sparc: consolidate show_cpuinfo in cpu.c
sparc32,leon: implement genirq CPU affinity
... -
Fix following sparc (32 bit) build error:
CC arch/sparc/kernel/asm-offsets.s
In file included from include/linux/seqlock.h:29:0,
from include/linux/time.h:8,
from include/linux/timex.h:56,
from include/linux/sched.h:57,
from arch/sparc/kernel/asm-offsets.c:13:
include/linux/spinlock.h: In function 'spin_unlock_wait':
include/linux/spinlock.h:360:2: error: implicit declaration of function 'cpu_relax'Most likely caused by commit e66eed651fd1 ("list: remove
prefetching from regular list iterators") due to include
changes.Signed-off-by: Sam Ravnborg
Cc: Stephen Rothwell
Signed-off-by: David S. Miller
21 May, 2011
3 commits
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* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1446 commits)
macvlan: fix panic if lowerdev in a bond
tg3: Add braces around 5906 workaround.
tg3: Fix NETIF_F_LOOPBACK error
macvlan: remove one synchronize_rcu() call
networking: NET_CLS_ROUTE4 depends on INET
irda: Fix error propagation in ircomm_lmp_connect_response()
irda: Kill set but unused variable 'bytes' in irlan_check_command_param()
irda: Kill set but unused variable 'clen' in ircomm_connect_indication()
rxrpc: Fix set but unused variable 'usage' in rxrpc_get_transport()
be2net: Kill set but unused variable 'req' in lancer_fw_download()
irda: Kill set but unused vars 'saddr' and 'daddr' in irlan_provider_connect_indication()
atl1c: atl1c_resume() is only used when CONFIG_PM_SLEEP is defined.
rxrpc: Fix set but unused variable 'usage' in rxrpc_get_peer().
rxrpc: Kill set but unused variable 'local' in rxrpc_UDP_error_handler()
rxrpc: Kill set but unused variable 'sp' in rxrpc_process_connection()
rxrpc: Kill set but unused variable 'sp' in rxrpc_rotate_tx_window()
pkt_sched: Kill set but unused variable 'protocol' in tc_classify()
isdn: capi: Use pr_debug() instead of ifdefs.
tg3: Update version to 3.119
tg3: Apply rx_discards fix to 5719/5720
...Fix up trivial conflicts in arch/x86/Kconfig and net/mac80211/agg-tx.c
as per Davem. -
Conflicts:
arch/sparc/kernel/smp_32.cWith merge conflict help from Daniel Hellstrom.
Signed-off-by: David S. Miller
20 May, 2011
2 commits
-
…kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (60 commits)
sched: Fix and optimise calculation of the weight-inverse
sched: Avoid going ahead if ->cpus_allowed is not changed
sched, rt: Update rq clock when unthrottling of an otherwise idle CPU
sched: Remove unused parameters from sched_fork() and wake_up_new_task()
sched: Shorten the construction of the span cpu mask of sched domain
sched: Wrap the 'cfs_rq->nr_spread_over' field with CONFIG_SCHED_DEBUG
sched: Remove unused 'this_best_prio arg' from balance_tasks()
sched: Remove noop in alloc_rt_sched_group()
sched: Get rid of lock_depth
sched: Remove obsolete comment from scheduler_tick()
sched: Fix sched_domain iterations vs. RCU
sched: Next buddy hint on sleep and preempt path
sched: Make set_*_buddy() work on non-task entities
sched: Remove need_migrate_task()
sched: Move the second half of ttwu() to the remote cpu
sched: Restructure ttwu() some more
sched: Rename ttwu_post_activation() to ttwu_do_wakeup()
sched: Remove rq argument from ttwu_stat()
sched: Remove rq->lock from the first half of ttwu()
sched: Drop rq->lock from sched_exec()
...* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
sched: Fix rt_rq runtime leakage bug -
…git/tip/linux-2.6-tip
* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (107 commits)
perf stat: Add more cache-miss percentage printouts
perf stat: Add -d -d and -d -d -d options to show more CPU events
ftrace/kbuild: Add recordmcount files to force full build
ftrace: Add self-tests for multiple function trace users
ftrace: Modify ftrace_set_filter/notrace to take ops
ftrace: Allow dynamically allocated function tracers
ftrace: Implement separate user function filtering
ftrace: Free hash with call_rcu_sched()
ftrace: Have global_ops store the functions that are to be traced
ftrace: Add ops parameter to ftrace_startup/shutdown functions
ftrace: Add enabled_functions file
ftrace: Use counters to enable functions to trace
ftrace: Separate hash allocation and assignment
ftrace: Create a global_ops to hold the filter and notrace hashes
ftrace: Use hash instead for FTRACE_FL_FILTER
ftrace: Replace FTRACE_FL_NOTRACE flag with a hash of ignored functions
perf bench, x86: Add alternatives-asm.h wrapper
x86, 64-bit: Fix copy_[to/from]_user() checks for the userspace address limit
x86, mem: memset_64.S: Optimize memset by enhanced REP MOVSB/STOSB
x86, mem: memmove_64.S: Optimize memmove by enhanced REP MOVSB/STOSB
...
19 May, 2011
1 commit
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Commit b826291c, "drivercore/dt: add a match table pointer to struct
device" added an of_match pointer to struct device to cache the
of_match_table entry discovered at driver match time. This was unsafe
because matching is not an atomic operation with probing a driver. If
two or more drivers are attempted to be matched to a driver at the
same time, then the cached matching entry pointer could get
overwritten.This patch reverts the of_match cache pointer and reworks all users to
call of_match_device() directly instead.Signed-off-by: Grant Likely
17 May, 2011
8 commits
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The function mmu_inval_dma_area takes a virtual address as a parameter
which is problematic in case the buffer is located in highmem and the
mapping currently is unavailable.Since the function was only implemented for LEON this patch removes
calls to it in non LEON code paths and renames it to dma_make_coherent
which instead takes a physical address (which for now is unused since we
flush the whole cache). This way it is possible to remove several unnecessary
calls to page_address which will fail if the virtual mapping is unavailable.Signed-off-by: Kristoffer Glembo
Acked-by: Sam Ravnborg
Signed-off-by: David S. Miller -
Adapt new API. Almost change is trivial, most important change are to
remove following like =operator.cpumask_t cpu_mask = *mm_cpumask(mm);
cpus_allowed = current->cpus_allowed;Because cpumask_var_t is =operator unsafe. These usage might prevent
kernel core improvement.No functional change.
Signed-off-by: KOSAKI Motohiro
Signed-off-by: David S. Miller -
The sun4d does not seem to have a distingstion between soft and hard
IRQs. When generating IPIs the generated IRQ looks like a hard IRQ,
this patch adds a "IPI check" in the sun4d irq trap handler at a
predefined IRQ number (SUN4D_IPI_IRQ). Before generating an IPI
a per-cpu memory structure is modified for the "IPI check" to
successfully detect a IPI request to a specific processor, the check
clears the IPI work requested.All three IPIs (resched, single and cpu-mask) use the same IRQ
number.The IPI IRQ should preferrably be on a separate IRQ and definitly
not shared with IRQ handlers requesting IRQ with IRQF_SHARED.Signed-off-by: Daniel Hellstrom
Signed-off-by: David S. Miller -
Implement the three IPIs (resched, single and cpu-mask) generation
and interrupt handler catch. The sun4m has 15 soft-IRQs and three
of them is used with this patch, the three IPIs was previously
implemented with the cross-call IRQ15 which does not work with
locking routines such as spinlocks because IRQ15 is NMI, it may
cause deadlock.The IRQ trap handler code assumes (in the same spritit as the old
it seems) that hard interrupts will be generated until handled
(level), when a IRQ happens the IRQ pending register is checked
for pending soft-IRQs. When both hard and soft IRQ happens at the
same time only soft-IRQs are handled.The old code implemented a soft-IRQ traphandler at IRQ14 which
called smp_reschedule_irq which in turn called set_need_resched.
It seems to be an old relic and is replaced with the interrupt
traphander exit code RESTORE_ALL, it calls schedule() when
appropriate.Signed-off-by: Daniel Hellstrom
Signed-off-by: David S. Miller -
This patch implements SMP IPIs on LEON using software generated
IRQs to signal between CPUs.The IPI IRQ number is set by using the ipi_num property in the
device tree, or defaults to 13. LEON SMP systems should reserve
IRQ 13 (and IRQ 15) to Linux in order for the defaults to work.Signed-off-by: Daniel Hellstrom
Signed-off-by: David S. Miller -
The current sparc32 SMP IPI generation is implemented the
cross call function. The cross call function uses IRQ15 the
NMI, this is has the effect that IPIs will interrupt IRQ
critical areas and hang the system. Typically on/after
spin_lock_irqsave calls can be aborted.The cross call functionality must still exist to flush
cache/TLBS.This patch provides CPU models a custom way to implement
generation of IPIs on the generic code's request. The
typical approach is to generate an IRQ for each IPI case.After this patch each sparc32 SMP CPU model needs to
implement IPIs in order to function properly.Signed-off-by: Daniel Hellstrom
Signed-off-by: David S. Miller -
Signed-off-by: Daniel Hellstrom
Signed-off-by: David S. Miller -
Signed-off-by: Daniel Hellstrom
Signed-off-by: David S. Miller
13 May, 2011
1 commit
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This patch adds {read,write}*_be big endian memory access
routines to the io.h header used on SPARC32 and SPARC64.Tested on SPARC32 (LEON)
Signed-off-by: Jan Andersson
Signed-off-by: David S. Miller
12 May, 2011
1 commit
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When we are in the label cc_dword_align, registers %o0 and %o1 have the same last 2 bits,
but it's not guaranteed one of them is zero. So we can get unaligned memory access
in label ccte. Example of parameters which lead to this:
%o0=0x7ff183e9, %o1=0x8e709e7d, %g1=3With the parameters I had a memory corruption, when the additional 5 bytes were rewritten.
This patch corrects the error.One comment to the patch. We don't care about the third bit in %o1, because cc_end_cruft
stores word or less.Signed-off-by: Tkhai Kirill
Signed-off-by: David S. Miller
06 May, 2011
1 commit
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This patch adds a multiple message send syscall and is the send
version of the existing recvmmsg syscall. This is heavily
based on the patch by Arnaldo that added recvmmsg.I wrote a microbenchmark to test the performance gains of using
this new syscall:http://ozlabs.org/~anton/junkcode/sendmmsg_test.c
The test was run on a ppc64 box with a 10 Gbit network card. The
benchmark can send both UDP and RAW ethernet packets.64B UDP
batch pkts/sec
1 804570
2 872800 (+ 8 %)
4 916556 (+14 %)
8 939712 (+17 %)
16 952688 (+18 %)
32 956448 (+19 %)
64 964800 (+20 %)64B raw socket
batch pkts/sec
1 1201449
2 1350028 (+12 %)
4 1461416 (+22 %)
8 1513080 (+26 %)
16 1541216 (+28 %)
32 1553440 (+29 %)
64 1557888 (+30 %)We see a 20% improvement in throughput on UDP send and 30%
on raw socket send.[ Add sparc syscall entries. -DaveM ]
Signed-off-by: Anton Blanchard
Signed-off-by: David S. Miller
27 Apr, 2011
1 commit
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…stedt/linux-2.6-trace into perf/core
Conflicts:
include/linux/perf_event.hMerge reason: pick up the latest jump-label enhancements, they are cooked ready.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
22 Apr, 2011
14 commits
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Signed-off-by: Daniel Hellstrom
Signed-off-by: David S. Miller -
* proper initialization of boot_cpu_id (no hardcoding to 0)
* use boot_cpu_id index to address into the IRQ controller where
appropriateEach CPU has a separate set of IRQ controller registers, this
patch makes sure that the boot-cpu registers are used instead
of CPU0's.Signed-off-by: Daniel Hellstrom
Signed-off-by: David S. Miller -
Define boot_cpu_id in single-processor kernels as well. This is
to support architectures which can boot on other than CPU0.Sam Ravnborg has written the cleanup parts by extracting
boot_cpu_id from smp_32.c into setup_32.c and cleaned up
sun4d_irq.c.boot_cpu_id was initialized before BSS was cleared in
sun4c_continue_boot, instead boot_cpu_id is set to 0xff to
avoid BSS. If boot_cpu_id is untouched (0xff) by bootup code
it will be overwritten to 0. boot_cpu_id4 is automatically
calculated in common code.Signed-off-by: Daniel Hellstrom
Signed-off-by: David S. Miller -
Signed-off-by: Daniel Hellstrom
Signed-off-by: David S. Miller -
The sparcstation 5 I have available has no MID property for the CPU.
This resulted in a panic when booting a SMP kernel on this box.The assigned field in cpu_data is never used, so if we fail
to read the MID property then inform user and continue booting.Signed-off-by: Sam Ravnborg
Signed-off-by: David S. Miller -
Fix following warning:
mm/percpu.c: In function 'pcpu_embed_first_chunk':
mm/percpu.c:1647:3: warning: format '%lx' expects type 'long unsigned int', but argument 3 has type 'unsigned int'Signed-off-by: Daniel Hellstrom
[sam: added warning message to changelog, use _AC()]
Signed-off-by: Sam Ravnborg
Signed-off-by: David S. Miller -
Do not require user to add "-p" to boot arguments to see
early info printed to prom console.This is similar to the sparc64 functionality - which was added with:
3c62a2d3477ff7725210db57aec3d2806fa10c20 ("[SPARC64]: Always register
a PROM based early console.")Signed-off-by: Sam Ravnborg
Signed-off-by: David S. Miller -
We did a cpu_probe() call each time a CPU got online - which
only effect was to save latest CPU/FPU info for use by show_cpuinfo().
Use same setup as for sparc64 where we probe for this info during startup,
and only once.This allowed us to annotate a few functions __init which again
fixed the following section mismatch warnings:WARNING: vmlinux.o(.text+0x65f0): Section mismatch in reference from the function set_cpu_and_fpu() to the (unknown reference) .init.rodata:(unknown)
WARNING: vmlinux.o(.text+0x65f8): Section mismatch in reference from the function set_cpu_and_fpu() to the (unknown reference) .init.rodata:(unknown)
WARNING: vmlinux.o(.text+0x664c): Section mismatch in reference from the function set_cpu_and_fpu() to the variable .init.rodata:manufacturer_info
WARNING: vmlinux.o(.text+0x6650): Section mismatch in reference from the function set_cpu_and_fpu() to the variable .init.rodata:manufacturer_infoSigned-off-by: Sam Ravnborg
Signed-off-by: David S. Miller -
We have all the cpu related info in cpu.c - so move
the remaining functions to support /proc/cpuinfo to this file.Signed-off-by: Sam Ravnborg
Signed-off-by: David S. Miller -
In all cases there were a struct of_device_id variable defined __initdata.
But it was referenced from struct platform_driver.of_match_table
which is not guaranteed to be used during init only.So drop the __initdata annotation.
This fixes following warnings:
WARNING: arch/sparc/kernel/built-in.o(.data+0x810): Section mismatch in reference from the variable clock_driver to the variable .init.data:clock_match
The variable clock_driver references
the variable __initdata clock_match
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_consoleWARNING: arch/sparc/kernel/built-in.o(.data+0xcec): Section mismatch in reference from the variable apc_driver to the variable .init.data:apc_match
The variable apc_driver references
the variable __initdata apc_match
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_consoleWARNING: arch/sparc/kernel/built-in.o(.data+0xd60): Section mismatch in reference from the variable pmc_driver to the variable .init.data:pmc_match
The variable pmc_driver references
the variable __initdata pmc_match
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_consoleSigned-off-by: Sam Ravnborg
Signed-off-by: David S. Miller -
A simple implementation of CPU affinity, the first CPU in
the affinity CPU mask always takes the IRQ.Signed-off-by: Daniel Hellstrom
Acked-by: Sam Ravnborg
Signed-off-by: David S. Miller -
Cleaned up leon_init_timers() by removing unnecessary double checking
and one indentation level. Changed LEON_IMASK to LEON_IMASK(cpu).Signed-off-by: Daniel Hellstrom
Acked-by: Sam Ravnborg
Signed-off-by: David S. Miller -
Signed-off-by: Daniel Hellstrom
Acked-by: Sam Ravnborg
Signed-off-by: David S. Miller -
Signed-off-by: Daniel Hellstrom
Acked-by: Sam Ravnborg
Signed-off-by: David S. Miller