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493 commits

Author SHA1 Message Date
Matt Helsley
dc52ddc0e6 container freezer: implement freezer cgroup subsystem
This patch implements a new freezer subsystem in the control groups
framework.  It provides a way to stop and resume execution of all tasks in
a cgroup by writing in the cgroup filesystem.

The freezer subsystem in the container filesystem defines a file named
freezer.state.  Writing "FROZEN" to the state file will freeze all tasks
in the cgroup.  Subsequently writing "RUNNING" will unfreeze the tasks in
the cgroup.  Reading will return the current state.

* Examples of usage :

   # mkdir /containers/freezer
   # mount -t cgroup -ofreezer freezer  /containers
   # mkdir /containers/0
   # echo $some_pid > /containers/0/tasks

to get status of the freezer subsystem :

   # cat /containers/0/freezer.state
   RUNNING

to freeze all tasks in the container :

   # echo FROZEN > /containers/0/freezer.state
   # cat /containers/0/freezer.state
   FREEZING
   # cat /containers/0/freezer.state
   FROZEN

to unfreeze all tasks in the container :

   # echo RUNNING > /containers/0/freezer.state
   # cat /containers/0/freezer.state
   RUNNING

This is the basic mechanism which should do the right thing for user space
task in a simple scenario.

It's important to note that freezing can be incomplete.  In that case we
return EBUSY.  This means that some tasks in the cgroup are busy doing
something that prevents us from completely freezing the cgroup at this
time.  After EBUSY, the cgroup will remain partially frozen -- reflected
by freezer.state reporting "FREEZING" when read.  The state will remain
"FREEZING" until one of these things happens:

	1) Userspace cancels the freezing operation by writing "RUNNING" to
		the freezer.state file
	2) Userspace retries the freezing operation by writing "FROZEN" to
		the freezer.state file (writing "FREEZING" is not legal
		and returns EIO)
	3) The tasks that blocked the cgroup from entering the "FROZEN"
		state disappear from the cgroup's set of tasks.

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: export thaw_process]
Signed-off-by: Cedric Le Goater <clg@fr.ibm.com>
Signed-off-by: Matt Helsley <matthltc@us.ibm.com>
Acked-by: Serge E. Hallyn <serue@us.ibm.com>
Tested-by: Matt Helsley <matthltc@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-20 08:52:34 -07:00
Matt Helsley
83224b0837 container freezer: add TIF_FREEZE flag to all architectures
This patch series introduces a cgroup subsystem that utilizes the swsusp
freezer to freeze a group of tasks.  It's immediately useful for batch job
management scripts.  It should also be useful in the future for
implementing container checkpoint/restart.

The freezer subsystem in the container filesystem defines a cgroup file
named freezer.state.  Reading freezer.state will return the current state
of the cgroup.  Writing "FROZEN" to the state file will freeze all tasks
in the cgroup.  Subsequently writing "RUNNING" will unfreeze the tasks in
the cgroup.

* Examples of usage :

   # mkdir /containers/freezer
   # mount -t cgroup -ofreezer freezer  /containers
   # mkdir /containers/0
   # echo $some_pid > /containers/0/tasks

to get status of the freezer subsystem :

   # cat /containers/0/freezer.state
   RUNNING

to freeze all tasks in the container :

   # echo FROZEN > /containers/0/freezer.state
   # cat /containers/0/freezer.state
   FREEZING
   # cat /containers/0/freezer.state
   FROZEN

to unfreeze all tasks in the container :

   # echo RUNNING > /containers/0/freezer.state
   # cat /containers/0/freezer.state
   RUNNING

This patch:

The first step in making the refrigerator() available to all
architectures, even for those without power management.

The purpose of such a change is to be able to use the refrigerator() in a
new control group subsystem which will implement a control group freezer.

[akpm@linux-foundation.org: fix sparc]
Signed-off-by: Cedric Le Goater <clg@fr.ibm.com>
Signed-off-by: Matt Helsley <matthltc@us.ibm.com>
Acked-by: Pavel Machek <pavel@suse.cz>
Acked-by: Serge E. Hallyn <serue@us.ibm.com>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Nigel Cunningham <nigel@tuxonice.net>
Tested-by: Matt Helsley <matthltc@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-20 08:52:33 -07:00
Martin Schwidefsky
0b59268285 [PATCH] remove unused ibcs2/PER_SVR4 in SET_PERSONALITY
The SET_PERSONALITY macro is always called with a second argument of 0.
Remove the ibcs argument and the various tests to set the PER_SVR4
personality.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-10-16 15:40:05 +02:00
Linus Torvalds
5723ff931a Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  chmc: Mark %ver register inline asm with __volatile__
  sparc64: Add missing notify_cpu_starting() call.
  sparc32: fix build errors
2008-10-13 10:07:53 -07:00
Linus Torvalds
244dc4e54b Merge git://git.infradead.org/users/dwmw2/random-2.6
* git://git.infradead.org/users/dwmw2/random-2.6:
  Fix autoloading of MacBook Pro backlight driver.
  Automatic MODULE_ALIAS() for DMI match tables.
  Remove asm/a.out.h files for all architectures without a.out support.
  Introduce HAVE_AOUT symbol to remove hard-coded arch list for BINFMT_AOUT
  Remove redundant CONFIG_ARCH_SUPPORTS_AOUT
  S390: Update comments about why we don't use <asm-generic/statfs.h>
  SPARC: Use <asm-generic/statfs.h>
  PowerPC: Use <asm-generic/statfs.h>
  PARISC: Use <asm-generic/statfs.h>
  x86_64: Use <asm-generic/statfs.h>
  IA64: Use <asm-generic/statfs.h>
  ARM: Use <asm-generic/statfs.h>
  Make <asm-generic/statfs.h> suitable for 64-bit platforms.
  Define and use PCI_DEVICE_ID_MARVELL_88ALP01_CCIC for CAFÉ camera driver
  [MTD] [NAND] Define and use PCI_DEVICE_ID_MARVELL_88ALP01_NAND for CAFÉ
  Use PCI_DEVICE_ID_88ALP01 for CAFÉ chip, rather than PCI_DEVICE_ID_CAFE.
  EFS: Don't set f_fsid in statfs().
2008-10-13 09:59:14 -07:00
David Miller
b70ac77185 serial: allow 8250 to be used on sparc
This requires three changes:

1) Remove !SPARC restriction in Kconfig.

2) Move Sparc specific serial drivers before 8250, so that serial
   console devices don't change names on us, even if 8250 finds
   devices.

3) Since the Sparc specific serial drivers try to use the
   same major/minor device namespace as 8250, some coordination
   is necessary.  Use the sunserial_*() layer routines to allocate
   minor number space within TTY_MAJOR when CONFIG_SPARC.

   This has no effect on other platforms.

Thanks to Josip Rodin for bringing up this issue and testing
plus debugging various revisions of this patch.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-13 09:51:40 -07:00
David Woodhouse
e758936e02 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:

	include/asm-x86/statfs.h
2008-10-13 17:13:56 +01:00
Robert Reif
4245e59d12 sparc32: fix build errors
arch/sparc/kernel/sun4d_smp.c: In function ‘smp4d_callin’:
arch/sparc/kernel/sun4d_smp.c:101: error: implicit declaration of function ‘notify_cpu_starting’
arch/sparc/kernel/sun4m_smp.c: In function ‘smp4m_callin’:
arch/sparc/kernel/sun4m_smp.c:74: error: implicit declaration of function ‘notify_cpu_starting’

Signed-off-by: Robert Reif <reif@earthlink.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-12 23:55:45 -07:00
David S. Miller
56c5d900db Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:

	sound/core/memalloc.c
2008-10-11 12:39:35 -07:00
Ingo Molnar
990d0f2ced Merge branches 'sched/devel', 'sched/cpu-hotplug', 'sched/cpusets' and 'sched/urgent' into sched/core 2008-10-08 11:31:02 +02:00
Robert Reif
6cf4a9243a sparc32: sun4m interrupt mask cleanup
Here is an updated version of a patch I wrote 6 years ago
http://marc.info/?l=linux-sparc&m=103939103607617&w=2
that simplifies interrupt mask lookup.  It's main purpose
is to add VME bus support but it's really a cleanup of the mask code.

Signed-off-by: Robert Reif <reif@earthlink.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 15:24:02 -07:00
David Brownell
a1cd0464c6 sparc: arch/sparc/kernel/pmc.c -- extra #include?
I have no SPARC compiler handy to verify, but it looks like this
is another file that doesn't need <linux/miscdevices.h> ...

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-21 00:28:26 -07:00
David S. Miller
778b1c65bf sparc32: Add more extensive documentation of sun4m interrupts.
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-19 21:18:05 -07:00
David S. Miller
e7913de928 sparc32: Kill irq_rcvreg from sun4m_irq.c
Unused.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-19 21:18:04 -07:00
David S. Miller
c7e606a8f8 sparc32: Delete master_l10_limit.
It is only set, never used.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-19 21:18:03 -07:00
David S. Miller
8bd8deead7 sparc32: Use PROM device probing for sun4c timers.
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-19 21:18:02 -07:00
David S. Miller
45bb5a7cbf sparc32: Use PROM device probing for sun4c interrupt register.
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-19 21:18:01 -07:00
David S. Miller
5ff0d55f93 sparc32: Delete claim_ticker14().
No more users.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-19 21:18:01 -07:00
David S. Miller
b218fa0e9c sparc32: Stop calling claim_ticker14() from sun4c_irq.c
Since the first argument is always NULL, the only side effect
is to disable the PROFILE_IRQ, so just do that directly.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-19 21:17:59 -07:00
David S. Miller
76954261ba sparc32: Kill clear_profile_irq btfixup entry.
Unused.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-19 21:17:59 -07:00
David S. Miller
1de937a536 sparc32: Call sun4m_clear_profile_irq() directly from sun4m_smp.c
This is the only use of the clear_profile_irq() btfixup entry,
which just eats up lots of dead space on other platform types.

A subsequent commit will delete the other implementations and
the btfixup entry as well.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-19 21:17:58 -07:00
David S. Miller
a73554aedb sparc32: Remove #if 0'd code from sun4c_irq.c
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-19 21:17:57 -07:00
David S. Miller
f8376e933c sparc32: Remove some SMP ifdefs in sun4d_irq.c
Always do the sbus_tid[] handling.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-19 21:17:56 -07:00
David S. Miller
f5f1085720 sparc32: Use PROM infrastructure for probing and mapping sun4d timers.
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-19 21:17:56 -07:00
David S. Miller
69c010b245 sparc32: Use PROM device probing for sun4m irq registers.
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-19 21:17:43 -07:00
David S. Miller
2e57572a50 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
Conflicts:

	arch/sparc64/kernel/pci_psycho.c
2008-09-16 14:11:43 -07:00
David S. Miller
9b2e43ae4e sparc32: Use PROM device probing for sun4m timer registers.
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-13 21:37:32 -07:00
David S. Miller
7d4ee289d1 sparc: Fix user_regset 'n' field values.
As noticed by Russell King, we were not setting this properly
to the number of entries, but rather the total size.

This results in the core dumping code allocating waayyyy too
much memory.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-12 15:55:44 -07:00
David S. Miller
3c50370103 sparc: Fix user_regset 'n' field values.
As noticed by Russell King, we were not setting this properly
to the number of entries, but rather the total size.

This results in the core dumping code allocating waayyyy too
much memory.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-12 15:01:31 -07:00
David S. Miller
b539c46766 sparc64: Fix sparse warnings in fault.c
1) set_brkpt() is referenced by nothing and hasn't been used by anyone
   to my knowledge for many many years.  So just delete it.

2) add extern decl for do_sparc64_fault() in asm/pgtable_64.h

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-12 00:10:32 -07:00
David S. Miller
7e0b1e6186 sparc64: Fix sparse warnings in visemul.c
1) edge8 tables should be static
2) add vis_emul() extern decl. to asm/visasm.h

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-11 23:46:40 -07:00
David S. Miller
b0f1e7962f sparc64: Define WANT_PAGE_VIRTUAL
As sparse warns, without this struct page pointer subtraction is
extremely expensive, and this is a pretty common operation in
fast paths.

With this define struct page becomes 64 bytes which makes for a
simple subtract and shift, instead of a costly divide or reciprocol
multiply.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-11 23:36:32 -07:00
David S. Miller
17f04fbb0f sysctl: Use header file for sysctl knob declarations on sparc.
This also takes care of a sparse warning as scons_pwroff's definition
point.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-11 23:33:53 -07:00
David S. Miller
8f20b20de7 sparc64: Fix sparse warnings in global reg snapshotting.
Lots of shadowed local variables and global_reg_snapshot[] needs
an extern declaration in asm/ptrace_64.h.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-11 23:19:22 -07:00
David S. Miller
3fbe36d8da sparc32: Call parse_early_param() in setup_arch().
Mirror sparc64.  This will allow us to use early_param() on
sparc32 too.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-10 23:40:32 -07:00
David S. Miller
bdba4d6b77 sparc32: Fix function signature of of_bus_sbus_get_flags().
This doesn't match the function pointer type it gets assigned
to.  Luckily, this was harmless.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-10 23:38:51 -07:00
David S. Miller
d3ae4b5bc7 sparc64: Get rid of pci_controller_info.
It is just used as a parent to encapsulate two PBM objects.

But that layout is only really relevant and necessary for
psycho PCI controllers, which unlike all the others share
a single IOMMU instance between sibling PCI busses.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-10 23:07:41 -07:00
David S. Miller
ab138c031f sparc32: Need to close openned RTC device just like sparc64.
Otherwise we get refcount problems.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-10 13:36:13 -07:00
Bjoern B. Brandenburg
4944f7e5c9 sparc: remove unused includes
The spinlock code does not use NR_CPUS.
Compile tested using allyesconfig and allnoconfig.

Signed-off-by: Bjoern B. Brandenburg <bbb@cs.unc.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-09 19:43:33 -07:00
David S. Miller
7b1af32f52 sparc32: Move sun4d show_leds() out of asm/obio.h
Put it, as well as cpu_leds[] array, into sun4d_irq.c

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-08 15:40:45 -07:00
David S. Miller
365b50f0f0 sparc32: Fix coding style of sparc_cpu_model setting code.
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-08 15:40:31 -07:00
David S. Miller
98d86c0915 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
Conflicts:

	arch/sparc/kernel/of_device.c
2008-09-08 15:39:30 -07:00
Manfred Spraul
e545a6140b kernel/cpu.c: create a CPU_STARTING cpu_chain notifier
Right now, there is no notifier that is called on a new cpu, before the new
cpu begins processing interrupts/softirqs.
Various kernel function would need that notification, e.g. kvm works around
by calling smp_call_function_single(), rcu polls cpu_online_map.

The patch adds a CPU_STARTING notification. It also adds a helper function
that sends the message to all cpu_chain handlers.

Tested on x86-64.
All other archs are untested. Especially on sparc, I'm not sure if I got
it right.

Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-08 19:25:24 +02:00
David Woodhouse
52d90f4dad SPARC: Use <asm-generic/statfs.h>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-09-06 19:30:17 +01:00
Robert Reif
1aa0365f27 sparc32: add init memory poisoning
This patch adds init memory poisoning.  It looks like
totalram_pages was not updated properly in free_initrd_mem
so I fixed that as well.

Signed-off-by: Robert Reif <reif@earthlink.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-03 16:29:42 -07:00
David S. Miller
94d5b5432b sparc: Remove asm/rtc.h
No more users.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-03 16:19:46 -07:00
David S. Miller
f6e30ffcf3 sparc32: Kill asm/mostek.h.
No longer used.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-03 15:57:04 -07:00
David S. Miller
81c4fdb1d6 sparc32: Kill remaining asm/mostek.h inclusions.
No longer needed.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-03 15:56:27 -07:00
David S. Miller
c4cbe6f96e sparc32: use RTC subsystem
Use rtc subsystem for sparc32 architecture.
Actually, only one driver is needed: m48t59
as it supports the most common clocks on sparc32
machines: m48t08 and m48t02.

[ Add proper RTC layer calls to set_rtc_mmss() -DaveM ]

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-03 15:52:38 -07:00
David S. Miller
5280267c1d sparc: Fix handling of LANCE and ESP parent nodes in of_device.c
The device nodes that sit above 'esp' and 'le' on SBUS lack a 'ranges'
property, but we should pass the translation up to the parent node so
that the SBUS level ranges get applied.

Based upon a bug report from Robert Reif.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-03 02:05:19 -07:00