07 Jan, 2009
4 commits
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Signed-off-by: Harvey Harrison
Signed-off-by: Linus Torvalds -
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (60 commits)
uio: make uio_info's name and version const
UIO: Documentation for UIO ioport info handling
UIO: Pass information about ioports to userspace (V2)
UIO: uio_pdrv_genirq: allow custom irq_flags
UIO: use pci_ioremap_bar() in drivers/uio
arm: struct device - replace bus_id with dev_name(), dev_set_name()
libata: struct device - replace bus_id with dev_name(), dev_set_name()
avr: struct device - replace bus_id with dev_name(), dev_set_name()
block: struct device - replace bus_id with dev_name(), dev_set_name()
chris: struct device - replace bus_id with dev_name(), dev_set_name()
dmi: struct device - replace bus_id with dev_name(), dev_set_name()
gadget: struct device - replace bus_id with dev_name(), dev_set_name()
gpio: struct device - replace bus_id with dev_name(), dev_set_name()
gpu: struct device - replace bus_id with dev_name(), dev_set_name()
hwmon: struct device - replace bus_id with dev_name(), dev_set_name()
i2o: struct device - replace bus_id with dev_name(), dev_set_name()
IA64: struct device - replace bus_id with dev_name(), dev_set_name()
i7300_idle: struct device - replace bus_id with dev_name(), dev_set_name()
infiniband: struct device - replace bus_id with dev_name(), dev_set_name()
ISDN: struct device - replace bus_id with dev_name(), dev_set_name()
... -
The atomic_t type cannot currently be used in some header files because it
would create an include loop with asm/atomic.h. Move the type definition
to linux/types.h to break the loop.Signed-off-by: Matthew Wilcox
Cc: Huang Ying
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Replace s390_root_dev_register() with root_device_register() etc.
[Includes fix from Cornelia Huck]
Signed-off-by: Mark McLoughlin
Cc: Cornelia Huck
Signed-off-by: Greg Kroah-Hartman
04 Jan, 2009
1 commit
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…/git/tip/linux-2.6-tip
* 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (77 commits)
x86: setup_per_cpu_areas() cleanup
cpumask: fix compile error when CONFIG_NR_CPUS is not defined
cpumask: use alloc_cpumask_var_node where appropriate
cpumask: convert shared_cpu_map in acpi_processor* structs to cpumask_var_t
x86: use cpumask_var_t in acpi/boot.c
x86: cleanup some remaining usages of NR_CPUS where s/b nr_cpu_ids
sched: put back some stack hog changes that were undone in kernel/sched.c
x86: enable cpus display of kernel_max and offlined cpus
ia64: cpumask fix for is_affinity_mask_valid()
cpumask: convert RCU implementations, fix
xtensa: define __fls
mn10300: define __fls
m32r: define __fls
h8300: define __fls
frv: define __fls
cris: define __fls
cpumask: CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
cpumask: zero extra bits in alloc_cpumask_var_node
cpumask: replace for_each_cpu_mask_nr with for_each_cpu in kernel/time/
cpumask: convert mm/
...
01 Jan, 2009
1 commit
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Impact: New API
The old topology_core_siblings() and topology_thread_siblings() return
a cpumask_t; these new ones return a (const) struct cpumask *.Signed-off-by: Rusty Russell
Signed-off-by: Mike Travis
31 Dec, 2008
5 commits
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The extract cpu time instruction (ectg) instruction allows the user
process to get the current thread cputime without calling into the
kernel. The code that uses the instruction needs to switch to the
access registers mode to get access to the per-cpu info page that
contains the two base values that are needed to calculate the current
cputime from the CPU timer with the ectg instruction.Signed-off-by: Martin Schwidefsky
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Distinguish the cputime of the idle process where idle is actually using
cpu cycles from the cputime where idle is sleeping on an enabled wait psw.
The former is accounted as system time, the later as idle time.Signed-off-by: Martin Schwidefsky
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Increase the precision of the idle time calculation that is exported
to user space via /sys/devices/system/cpu/cpu/idle_time_usSigned-off-by: Martin Schwidefsky
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The unit of the cputime accouting values that are stored per process is
currently a microsecond. The CPU timer has a maximum granularity of
2**-12 microseconds. There is no benefit in storing the per process values
in the lesser precision and there is the disadvantage that the backend
has to do the rounding to microseconds. The better solution is to use
the maximum granularity of the CPU timer as cputime unit.Signed-off-by: Martin Schwidefsky
-
Conflicts:
arch/x86/kernel/io_apic.c
30 Dec, 2008
2 commits
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This doesn't really matter, since s390 pagesize is 4k anyway.
Signed-off-by: Rusty Russell
Acked-by: Christian Borntraeger
26 Dec, 2008
1 commit
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Like cpu_coregroup_map, but returns a (const) pointer.
Compile-tested on s390 (defconfig).
Signed-off-by: Rusty Russell
Signed-off-by: Mike Travis
25 Dec, 2008
13 commits
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Tell the compile that the clear_table inline assembly writes to the
memory referenced by *s.Signed-off-by: Martin Schwidefsky
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On s390 we always want to run with precise cputime accounting.
Remove the config options VIRT_TIMER and VIRT_CPU_ACCOUNTING.Signed-off-by: Martin Schwidefsky
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Signed-off-by: Harvey Harrison
Signed-off-by: Andrew Morton
Signed-off-by: Martin Schwidefsky -
Functions which end in a BUG() statement and skip the return statement
cause compile warnings on s390, e.g.:mm/bootmem.c: In function 'mark_bootmem':
mm/bootmem.c:321: warning: control reaches end of non-void functionTo avoid the warning add an endless loop to the BUG() macro.
Signed-off-by: Martin Schwidefsky
Signed-off-by: Martin Schwidefsky -
disabled_wait() won't return, so add an __attribute__((noreturn)).
This will remove a false positive finding which our internal code
checker reports.Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
Values for the sac field have changed - update code accordingly.
Signed-off-by: Peter Oberparleiter
Signed-off-by: Martin Schwidefsky -
This implements just the basic function tracer (_mcount) backend for s390.
The dynamic variant will come later.Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
Add a new proc interface /proc/service_levels that allows any code
to report a relevant service level, e.g. the microcode level of
devices, the service level of the hypervisor, etc.Signed-off-by: Martin Schwidefsky
-
qeth needs to get the port count information before
qdio has allocated a page for the chsc operation.
Extend qdio_get_ssqd_desc() to store the data in the
specified structure.Signed-off-by: Jan Glauber
Signed-off-by: Martin Schwidefsky -
When the machine supports AP adapter interrupts polling will be
switched off at module initialization and the driver will work in
interrupt mode.Signed-off-by: Felix Beck
Signed-off-by: Martin Schwidefsky -
stfle will be needed by the ap_bus module to figure out wether the AP
queue adapter interruption facility is installed.Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
Since etr/stp don't need the old smp_call_function semantics anymore
we can convert s390 to the generic IPI infrastructure.Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
Add a vdso to speed up gettimeofday and clock_getres/clock_gettime for
CLOCK_REALTIME/CLOCK_MONOTONIC.Signed-off-by: Martin Schwidefsky
01 Dec, 2008
2 commits
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* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6:
[S390] Update default configuration.
[S390] Fix alignment of initial kernel stack.
[S390] pgtable.h: Fix oops in unmap_vmas for KVM processes
[S390] fix/cleanup sched_clock
[S390] fix system call parameter functions. -
All architectures now use the generic compat_sys_ptrace, as should every
new architecture that needs 32bit compat (if we'll ever get another).Remove the now superflous __ARCH_WANT_COMPAT_SYS_PTRACE define, and also
kill a comment about __ARCH_SYS_PTRACE that was added after
__ARCH_SYS_PTRACE was already gone.Signed-off-by: Christoph Hellwig
Acked-by: David S. Miller
Signed-off-by: Linus Torvalds
27 Nov, 2008
2 commits
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When running several kvm processes with lots of memory overcommitment,
we have seen an oops during process shutdown:
------------[ cut here ]------------
Kernel BUG at 0000000000193434 [verbose debug info unavailable]
addressing exception: 0005 [#1] PREEMPT SMP
Modules linked in: kvm sunrpc qeth_l2 dm_mod qeth ccwgroup
CPU: 10 Not tainted 2.6.28-rc4-kvm-bigiron-00521-g0ccca08-dirty #8
Process kuli (pid: 14460, task: 0000000149822338, ksp: 0000000024f57650)
Krnl PSW : 0704e00180000000 0000000000193434 (unmap_vmas+0x884/0xf10)
R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 EA:3
Krnl GPRS: 0000000000000002 0000000000000000 000000051008d000 000003e05e6034e0
00000000001933f6 00000000000001e9 0000000407259e0a 00000002be88c400
00000200001c1000 0000000407259608 0000000407259e08 0000000024f577f0
0000000407259e09 0000000000445fa8 00000000001933f6 0000000024f577f0
Krnl Code: 0000000000193426: eb22000c000d sllg %r2,%r2,12
000000000019342c: a7180000 lhi %r1,0
0000000000193430: b2290012 iske %r1,%r2
>0000000000193434: a7110002 tmll %r1,2
0000000000193438: a7840006 brc 8,193444
000000000019343c: 9602c000 oi 0(%r12),2
0000000000193440: 96806000 oi 0(%r6),128
0000000000193444: a7110004 tmll %r1,4
Call Trace:
([] unmap_vmas+0x846/0xf10)
[] exit_mmap+0x210/0x458
[] mmput+0x54/0xfc
[] exit_mm+0x134/0x144
[] do_exit+0x240/0x878
[] do_group_exit+0x98/0xc8
[] get_signal_to_deliver+0x30c/0x358
[] do_signal+0xec/0x860
[] sysc_sigpending+0xe/0x22
[] 0x2000013198a
INFO: lockdep is turned off.
Last Breaking-Event-Address:
[] free_swap_and_cache+0x1a0/0x1a4
---[ end trace bc19f1d51ac9db7c ]---The faulting instruction is the storage key operation (iske) in
ptep_rcp_copy (called by pte_clear, called by unmap_vmas). iske
reads dirty and reference bit information for a physical page and
requires a valid physical address. Since we are in pte_clear, we
cannot rely on the pte containing a valid address. Fortunately we
dont need these information in pte_clear - after all there is no
mapping. The best fix is to remove the needless call to ptep_rcp_copy
that contains the iske.Signed-off-by: Christian Borntraeger
Signed-off-by: Martin Schwidefsky -
syscall_get_nr() currently returns a valid result only if the call
chain of the traced process includes do_syscall_trace_enter(). But
collect_syscall() can be called for any sleeping task, the result of
syscall_get_nr() in general is completely bogus.To make syscall_get_nr() work for any sleeping task the traps field
in pt_regs is replace with svcnr - the system call number the process
is executing. If svcnr == 0 the process is not on a system call path.The syscall_get_arguments and syscall_set_arguments use regs->gprs[2]
for the first system call parameter. This is incorrect since gprs[2]
may have been overwritten with the system call number if the call
chain includes do_syscall_trace_enter. Use regs->orig_gprs2 instead.Signed-off-by: Martin Schwidefsky
28 Oct, 2008
3 commits
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The s390 kernel does not compile if virtio console is enabled, but guest
support is disabled:LD .tmp_vmlinux1
arch/s390/kernel/built-in.o: In function `setup_arch':
/space/linux-2.5/arch/s390/kernel/setup.c:773: undefined reference to
`s390_virtio_console_init'The fix is related to
commit 99e65c92f2bbf84f43766a8bf701e36817d62822
Author: Christian Borntraeger
Date: Fri Jul 25 15:50:04 2008 +0200
KVM: s390: Fix guest kconfigWhich changed the build process to build kvm_virtio.c only if CONFIG_S390_GUEST
is set. We must ifdef the prototype in the header file accordingly.Reported-by: Heiko Carstens
Signed-off-by: Christian Borntraeger
Signed-off-by: Martin Schwidefsky -
We got a stack overflow with a small stack configuration on a 32 bit
system. It just looks like as 4kb isn't enough and too dangerous.
So lets get rid of 4kb stacks on 32 bit.But one thing I completely dislike about the call trace below is that
just for debugging or tracing purposes sprintf gets called (cio_start_key):/* process condition code */
sprintf(dbf_txt, "ccode:%d", ccode);
CIO_TRACE_EVENT(4, dbf_txt);But maybe its just me who thinks that this could be done better.
Kernel stack overflow.
Modules linked in: dm_multipath sunrpc bonding qeth_l2 dm_mod qeth ccwgroup vmur
CPU: 1 Not tainted 2.6.27-30.x.20081015-s390default #1
Process httpd (pid: 3807, task: 20ae2df8, ksp: 1666fb78)
Krnl PSW : 040c0000 8027098a (number+0xe/0x348)
R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:0 CC:0 PM:0
Krnl GPRS: 00d43318 0027097c 1666f277 9666f270
00000000 00000000 0000000a ffffffff
9666f270 1666f228 1666f277 1666f098
00000002 80270982 80271016 1666f098
Krnl Code: 8027097e: f0340dd0a7f1 srp 3536(4,%r0),2033(%r10),4
80270984: 0f00 clcl %r0,%r0
80270986: a7840001 brc 8,80270988
>8027098a: 18ef lr %r14,%r15
8027098c: a7faff68 ahi %r15,-152
80270990: 18bf lr %r11,%r15
80270992: 18a2 lr %r10,%r2
80270994: 1893 lr %r9,%r3Modified calltrace with annotated stackframe size of each function:
stackframe size
|
0 304 vsnprintf+850 [0x271016]
1 72 sprintf+74 [0x271522]
2 56 cio_start_key+262 [0x2d4c16]
3 56 ccw_device_start_key+222 [0x2dfe92]
4 56 ccw_device_start+40 [0x2dff28]
5 48 raw3215_start_io+104 [0x30b0f8]
6 56 raw3215_write+494 [0x30ba0a]
7 40 con3215_write+68 [0x30bafc]
8 40 __call_console_drivers+146 [0x12b0fa]
9 32 _call_console_drivers+102 [0x12b192]
10 64 release_console_sem+268 [0x12b614]
11 168 vprintk+462 [0x12bca6]
12 72 printk+68 [0x12bfd0]
13 256 __print_symbol+50 [0x15a882]
14 56 __show_trace+162 [0x103d06]
15 32 show_trace+224 [0x103e70]
16 48 show_stack+152 [0x103f20]
17 56 dump_stack+126 [0x104612]
18 96 __alloc_pages_internal+592 [0x175004]
19 80 cache_alloc_refill+776 [0x196f3c]
20 40 __kmalloc+258 [0x1972ae]
21 40 __alloc_skb+94 [0x328086]
22 32 pskb_copy+50 [0x328252]
23 32 skb_realloc_headroom+110 [0x328a72]
24 104 qeth_l2_hard_start_xmit+378 [0x7803bfde]
25 56 dev_hard_start_xmit+450 [0x32ef6e]
26 56 __qdisc_run+390 [0x3425d6]
27 48 dev_queue_xmit+410 [0x331e06]
28 40 ip_finish_output+308 [0x354ac8]
29 56 ip_output+218 [0x355b6e]
30 24 ip_local_out+56 [0x354584]
31 120 ip_queue_xmit+300 [0x355cec]
32 96 tcp_transmit_skb+812 [0x367da8]
33 40 tcp_push_one+158 [0x369fda]
34 112 tcp_sendmsg+852 [0x35d5a0]
35 240 sock_sendmsg+164 [0x32035c]
36 56 kernel_sendmsg+86 [0x32064a]
37 88 sock_no_sendpage+98 [0x322b22]
38 104 tcp_sendpage+70 [0x35cc1e]
39 48 sock_sendpage+74 [0x31eb66]
40 64 pipe_to_sendpage+102 [0x1c4b2e]
41 64 __splice_from_pipe+120 [0x1c5340]
42 72 splice_from_pipe+90 [0x1c57e6]
43 56 generic_splice_sendpage+38 [0x1c5832]
44 48 do_splice_from+104 [0x1c4c38]
45 48 direct_splice_actor+52 [0x1c4c88]
46 80 splice_direct_to_actor+180 [0x1c4f80]
47 72 do_splice_direct+70 [0x1c5112]
48 64 do_sendfile+360 [0x19de18]
49 72 sys_sendfile64+126 [0x19df32]
50 336 sysc_do_restart+18 [0x111a1a]Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
The current enable_sie code sets the mm->context.pgstes bit to tell
dup_mm that the new mm should have extended page tables. This bit is also
used by the s390 specific page table primitives to decide about the page
table layout - which means context.pgstes has two meanings. This can cause
any kind of bugs. For example - e.g. shrink_zone can call
ptep_clear_flush_young while enable_sie is running. ptep_clear_flush_young
will test for context.pgstes. Since enable_sie changed that value of the old
struct mm without changing the page table layout ptep_clear_flush_young will
do the wrong thing.
The solution is to split pgstes into two bits
- one for the allocation
- one for the current stateSigned-off-by: Christian Borntraeger
Signed-off-by: Martin Schwidefsky
20 Oct, 2008
1 commit
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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/tasksto get status of the freezer subsystem :
# cat /containers/0/freezer.state
RUNNINGto freeze all tasks in the container :
# echo FROZEN > /containers/0/freezer.state
# cat /containers/0/freezer.state
FREEZING
# cat /containers/0/freezer.state
FROZENto unfreeze all tasks in the container :
# echo RUNNING > /containers/0/freezer.state
# cat /containers/0/freezer.state
RUNNINGThis 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
Signed-off-by: Matt Helsley
Acked-by: Pavel Machek
Acked-by: Serge E. Hallyn
Acked-by: Rafael J. Wysocki
Acked-by: Nigel Cunningham
Tested-by: Matt Helsley
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
16 Oct, 2008
1 commit
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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
14 Oct, 2008
1 commit
-
Conflicts:
include/asm-x86/statfs.h
11 Oct, 2008
3 commits
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This patch defines a dirty bit in the PGSTE that can be used to implement
dirty pages logging for KVM's live migration. The bit is set in the
ptep_rcp_copy function, which is called to save dirty and referenced information
from the storage key in the PGSTE. The bit can be tested and reset by KVM using
the kvm_s390_test_and_clear_page_dirty function that is introduced by this patch.Acked-by: Carsten Otte
Signed-off-by: Florian Funke
Signed-off-by: Martin Schwidefsky -
EMC Symmetrix Subsystem Control I/O through CKD dasd requires a
specific parameter list sent to the array via a Perform Subsystem
Function CCW. The Symmetrix response is retrieved from the array
via a Read Subsystem Data CCW.Signed-off-by: Nigel Hislop
Signed-off-by: Hannes Reinecke
Signed-off-by: Martin Schwidefsky -
Move cio's private simple udelay function to lib/delay.c and turn it
into something much more readable. So we have all implementations
at one place.Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky
