linux.git/kernel/irq/handle.c, branch v2.6.31

irq: slab alloc for default irq_affinity

2009-06-12T10:50:23+00:00

Ingo had

[    0.000000] ------------[ cut here ]------------
[    0.000000] WARNING: at mm/bootmem.c:537 alloc_arch_preferred_bootmem+0x2b/0x71()
[    0.000000] Hardware name: System Product Name
[    0.000000] Modules linked in:
[    0.000000] Pid: 0, comm: swapper Tainted: G        W  2.6.30-tip-03087-g0bb2618-dirty #52506
[    0.000000] Call Trace:
[    0.000000]  [<81032588>] warn_slowpath_common+0x60/0x90
[    0.000000]  [<810325c5>] warn_slowpath_null+0xd/0x10
[    0.000000]  [<819d1bc0>] alloc_arch_preferred_bootmem+0x2b/0x71
[    0.000000]  [<819d1c31>] ___alloc_bootmem_nopanic+0x2b/0x9a
[    0.000000]  [<81050a0a>] ? lock_release+0xac/0xb2
[    0.000000]  [<819d1d4c>] ___alloc_bootmem+0xe/0x2d
[    0.000000]  [<819d1e9f>] __alloc_bootmem+0xa/0xc
[    0.000000]  [<819d7c63>] alloc_bootmem_cpumask_var+0x21/0x26
[    0.000000]  [<819d0cc8>] early_irq_init+0x15/0x10d
[    0.000000]  [<819bb75a>] start_kernel+0x167/0x326
[    0.000000]  [<819bb06b>] __init_begin+0x6b/0x70
[    0.000000] ---[ end trace 4eaa2a86a8e2da23 ]---
[    0.000000] NR_IRQS:2304 nr_irqs:424
[    0.000000] CPU 0 irqstacks, hard=821e6000 soft=821e7000

we need to update init_irq_default_affinity

Signed-off-by: Yinghai Lu 
Signed-off-by: Pekka Enberg

irq: use kcalloc() instead of the bootmem allocator

2009-06-11T16:27:13+00:00

Fixes the following problem:

[    0.000000] Experimental hierarchical RCU init done.
[    0.000000] NR_IRQS:4352 nr_irqs:256
[    0.000000] ------------[ cut here ]------------
[    0.000000] WARNING: at mm/bootmem.c:537 alloc_arch_preferred_bootmem+0x40/0x7e()
[    0.000000] Hardware name: To Be Filled By O.E.M.
[    0.000000] Pid: 0, comm: swapper Not tainted 2.6.30-tip-02161-g7a74539-dirty #59709
[    0.000000] Call Trace:
[    0.000000]  [] ? alloc_arch_preferred_bootmem+0x40/0x7e
[    0.000000]  [] warn_slowpath_common+0x88/0xcb
[    0.000000]  [] warn_slowpath_null+0x27/0x3d
[    0.000000]  [] alloc_arch_preferred_bootmem+0x40/0x7e
[    0.000000]  [] ___alloc_bootmem_nopanic+0x4e/0xec
[    0.000000]  [] ___alloc_bootmem+0x20/0x61
[    0.000000]  [] __alloc_bootmem+0x1e/0x34
[    0.000000]  [] early_irq_init+0x6d/0x118
[    0.000000]  [] ? early_idt_handler+0x0/0x71
[    0.000000]  [] start_kernel+0x192/0x394
[    0.000000]  [] ? early_idt_handler+0x0/0x71
[    0.000000]  [] x86_64_start_reservations+0xb4/0xcf
[    0.000000]  [] ? __init_begin+0x0/0x140
[    0.000000]  [] x86_64_start_kernel+0x158/0x17b
[    0.000000] ---[ end trace a7919e7f17c0a725 ]---
[    0.000000] Fast TSC calibration using PIT
[    0.000000] Detected 2002.510 MHz processor.
[    0.004000] Console: colour VGA+ 80x25

Reported-by: Ingo Molnar 
Signed-off-by: Pekka Enberg

irq/cpumask: make memoryless node zero happy

2009-06-11T16:27:08+00:00

Don't hardcode to node zero for early boot IRQ setup memory allocations.

[ penberg@cs.helsinki.fi: minor cleanups ]
Cc: Ingo Molnar 
Cc: Johannes Weiner 
Cc: Linus Torvalds 
Signed-off-by: Yinghai Lu 
Signed-off-by: Pekka Enberg

Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-06-11T02:53:40+00:00

* 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (244 commits)
  Revert "x86, bts: reenable ptrace branch trace support"
  tracing: do not translate event helper macros in print format
  ftrace/documentation: fix typo in function grapher name
  tracing/events: convert block trace points to TRACE_EVENT(), fix !CONFIG_BLOCK
  tracing: add protection around module events unload
  tracing: add trace_seq_vprint interface
  tracing: fix the block trace points print size
  tracing/events: convert block trace points to TRACE_EVENT()
  ring-buffer: fix ret in rb_add_time_stamp
  ring-buffer: pass in lockdep class key for reader_lock
  tracing: add annotation to what type of stack trace is recorded
  tracing: fix multiple use of __print_flags and __print_symbolic
  tracing/events: fix output format of user stack
  tracing/events: fix output format of kernel stack
  tracing/trace_stack: fix the number of entries in the header
  ring-buffer: discard timestamps that are at the start of the buffer
  ring-buffer: try to discard unneeded timestamps
  ring-buffer: fix bug in ring_buffer_discard_commit
  ftrace: do not profile functions when disabled
  tracing: make trace pipe recognize latency format flag
  ...

sparseirq: Allow early irq_desc allocation

2009-05-23T12:55:24+00:00

Presently non-legacy IRQs have their irq_desc allocated with
kzalloc_node(). This assumes that all callers of irq_to_desc_node_alloc()
will be sufficiently late in the boot process that kmalloc is available.

While porting sparseirq support to sh this blew up immediately, as at the
time that we register the CPU's interrupt vector map only bootmem is
available. Check slab_is_available() to work out which path to use.

[ Impact: fix SH early boot crash with sparseirq enabled ]

Signed-off-by: Paul Mundt 
Acked-by: Yinghai Lu 
Cc: Andrew Morton 
Cc: Mel Gorman 
LKML-Reference: <20090522014008.GA2806@linux-sh.org>
Signed-off-by: Ingo Molnar

Merge branch 'x86/apic' into irq/numa

2009-05-12T10:17:36+00:00

Merge reason: both topics modify the APIC code but were able to do it in
              parallel so far. An upcoming patch generates a conflict so
              merge them to avoid the conflict.

Signed-off-by: Ingo Molnar

Merge branch 'linus' into tracing/core

2009-05-07T09:17:34+00:00

Merge reason: tracing/core was on a .30-rc1 base and was missing out on
              on a handful of tracing fixes present in .30-rc5-almost.

Signed-off-by: Ingo Molnar

Revert "genirq: assert that irq handlers are indeed running in hardirq context"

2009-05-01T13:16:04+00:00

This reverts commit 044d408409cc4e1bc75c886e27ca85c270db104c.

The commit added a warning when handle_IRQ_event() is called outside
of hard interrupt context. This breaks the generic tasklet based
interrupt resend mechanism which is used when the hardware has no way
to retrigger the interrupt. So we get a warning for a use case which
is correct and worked for years. Remove it.

Signed-off-by: Thomas Gleixner

tracing: fix build failure on s390

2009-04-29T12:06:21+00:00

"tracing: create automated trace defines" causes this compile error on s390,
as reported by Sachin Sant against linux-next:

 kernel/built-in.o: In function `__do_softirq':
 (.text+0x1c680): undefined reference to `__tracepoint_softirq_entry'

This happens because the definitions of the softirq tracepoints were moved
from kernel/softirq.c to kernel/irq/handle.c. Since s390 doesn't support
generic hardirqs handle.c doesn't get compiled and the definitions are
missing.

So move the tracepoints to softirq.c again.

[ Impact: fix build failure on s390 ]

Reported-by: Sachin Sant 
Signed-off-by: Heiko Carstens 
Cc: Steven Rostedt 
Cc: fweisbec@gmail.com
LKML-Reference: <20090429135139.5fac79b8@osiris.boeblingen.de.ibm.com>
Signed-off-by: Ingo Molnar

x86/irq: change irq_desc_alloc() to take node instead of cpu

2009-04-28T10:21:17+00:00

This simplifies the node awareness of the code. All our allocators
only deal with a NUMA node ID locality not with CPU ids anyway - so
there's no need to maintain (and transform) a CPU id all across the
IRq layer.

v2: keep move_irq_desc related

[ Impact: cleanup, prepare IRQ code to be NUMA-aware ]

Signed-off-by: Yinghai Lu 
Cc: Andrew Morton 
Cc: Suresh Siddha 
Cc: "Eric W. Biederman" 
Cc: Rusty Russell 
Cc: Jeremy Fitzhardinge 
LKML-Reference: <49F65536.2020300@kernel.org>
Signed-off-by: Ingo Molnar