- 04 2月, 2010 2 次提交
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由 Masami Hiramatsu 提交于
Introducing *_text_reserved functions for checking the text address range is partially reserved or not. This patch provides checking routines for x86 smp alternatives and dynamic ftrace. Since both functions modify fixed pieces of kernel text, they should reserve and protect those from other dynamic text modifier, like kprobes. This will also be extended when introducing other subsystems which modify fixed pieces of kernel text. Dynamic text modifiers should avoid those. Signed-off-by: NMasami Hiramatsu <mhiramat@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: przemyslaw@pawelczyk.it Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Jim Keniston <jkenisto@us.ibm.com> Cc: Mathieu Desnoyers <compudj@krystal.dyndns.org> Cc: Jason Baron <jbaron@redhat.com> LKML-Reference: <20100202214911.4694.16587.stgit@dhcp-100-2-132.bos.redhat.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Masami Hiramatsu 提交于
Disable kprobe booster when CONFIG_PREEMPT=y at this time, because it can't ensure that all kernel threads preempted on kprobe's boosted slot run out from the slot even using freeze_processes(). The booster on preemptive kernel will be resumed if synchronize_tasks() or something like that is introduced. Signed-off-by: NMasami Hiramatsu <mhiramat@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jim Keniston <jkenisto@us.ibm.com> Cc: Mathieu Desnoyers <compudj@krystal.dyndns.org> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <20100202214904.4694.24330.stgit@dhcp-100-2-132.bos.redhat.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 29 1月, 2010 18 次提交
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由 Peter Zijlstra 提交于
At enable time the counter might still have a ->idx pointing to a previously occupied location that might now be taken by another event. Resetting the counter at that location with data from this event will destroy the other counter's count. Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100127221122.261477183@chello.nl> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Peter Zijlstra 提交于
The new Intel documentation includes Westmere arch specific event maps that are significantly different from the Nehalem ones. Add support for this generation. Found the CPUID model numbers on wikipedia. Also ammend some Nehalem constraints, spotted those when looking for the differences between Nehalem and Westmere. Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100127221122.151865645@chello.nl> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Peter Zijlstra 提交于
Put the recursion avoidance code in the generic hook instead of replicating it in each implementation. Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100127221122.057507285@chello.nl> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Peter Zijlstra 提交于
Since constraints are specified on the event number, not number and unit mask shorten the constraint masks so that we'll actually match something. Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100127221121.967610372@chello.nl> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Peter Zijlstra 提交于
Share the meat of the x86_pmu_disable() code with hw_perf_enable(). Also remove the barrier() from that code, since I could not convince myself we actually need it. Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <new-submission> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Ingo Molnar 提交于
- Remove stray debug code - Improve ugly macros a bit - Remove some whitespace damage - (Also fix up some accumulated damage in perf_event.h) Signed-off-by: NIngo Molnar <mingo@elte.hu> Cc: Stephane Eranian <eranian@google.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission>
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由 Peter Zijlstra 提交于
x86_pmu_disable() removes the event from the cpuc->event_list[], however since an event can only be on that list once, stop looking after we found it. Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <new-submission> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Peter Zijlstra 提交于
Remove num from the fast path and save a few ops. Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100122155536.056430539@chello.nl> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Peter Zijlstra 提交于
Add a weight member to the constraint structure and avoid recomputing the weight at runtime. Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100122155535.963944926@chello.nl> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Peter Zijlstra 提交于
Instead of copying bitmasks around, pass pointers to the constraint structure. Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100122155535.887853503@chello.nl> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Peter Zijlstra 提交于
Introduce INTEL_EVENT_CONSTRAINT and FIXED_EVENT_CONSTRAINT to reduce some line length and typing work. Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100122155535.688730371@chello.nl> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Peter Zijlstra 提交于
We need this to be u64 for direct assigment, but the bitmask functions all work on unsigned long, leading to cast heaven, solve this by using a union. Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100122155535.595961269@chello.nl> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Peter Zijlstra 提交于
Constraints gets defined an u64 but in long quantities and then cast to long. Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100122155535.504916780@chello.nl> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Peter Zijlstra 提交于
GCC was complaining the stack usage was too large, so allocate the structure. Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100122155535.411197266@chello.nl> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Stephane Eranian 提交于
Implement correct fastpath scheduling, i.e., reuse previous assignment. Signed-off-by: NStephane Eranian <eranian@google.com> [ split from larger patch] Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <4b588464.1818d00a.4456.383b@mx.google.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Stephane Eranian 提交于
This patch improves event scheduling by maximizing the use of PMU registers regardless of the order in which events are created in a group. The algorithm takes into account the list of counter constraints for each event. It assigns events to counters from the most constrained, i.e., works on only one counter, to the least constrained, i.e., works on any counter. Intel Fixed counter events and the BTS special event are also handled via this algorithm which is designed to be fairly generic. The patch also updates the validation of an event to use the scheduling algorithm. This will cause early failure in perf_event_open(). The 2nd version of this patch follows the model used by PPC, by running the scheduling algorithm and the actual assignment separately. Actual assignment takes place in hw_perf_enable() whereas scheduling is implemented in hw_perf_group_sched_in() and x86_pmu_enable(). Signed-off-by: NStephane Eranian <eranian@google.com> [ fixup whitespace and style nits as well as adding is_x86_event() ] Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <4b5430c6.0f975e0a.1bf9.ffff85fe@mx.google.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 K.Prasad 提交于
Processing of debug exceptions in do_debug() can stop if it originated from a hw-breakpoint exception by returning NOTIFY_STOP in most cases. But for certain cases such as: a) user-space breakpoints with pending SIGTRAP signal delivery (as in the case of ptrace induced breakpoints). b) exceptions due to other causes than breakpoints We will continue to process the exception by returning NOTIFY_DONE. Signed-off-by: NK.Prasad <prasad@linux.vnet.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Roland McGrath <roland@redhat.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Jan Kiszka <jan.kiszka@siemens.com> LKML-Reference: <20100128111415.GC13935@in.ibm.com> Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
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由 K.Prasad 提交于
Clear the reserved bits from the stored copy of debug status register (DR6). This will help easy bitwise operations such as quick testing of a debug event origin. Signed-off-by: NK.Prasad <prasad@linux.vnet.ibm.com> Cc: Roland McGrath <roland@redhat.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Ingo Molnar <mingo@elte.hu> LKML-Reference: <20100128111401.GB13935@in.ibm.com> Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
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- 28 1月, 2010 1 次提交
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由 Anton Blanchard 提交于
When running perf across all cpus with backtracing (-a -g), sometimes we get samples without associated backtraces: 23.44% init [kernel] [k] restore 11.46% init eeba0c [k] 0x00000000eeba0c 6.77% swapper [kernel] [k] .perf_ctx_adjust_freq 5.73% init [kernel] [k] .__trace_hcall_entry 4.69% perf libc-2.9.so [.] 0x0000000006bb8c | |--11.11%-- 0xfffa941bbbc It turns out the backtrace code has a check for the idle task and the IP sampling does not. This creates problems when profiling an interrupt heavy workload (in my case 10Gbit ethernet) since we get no backtraces for interrupts received while idle (ie most of the workload). Right now x86 and sh check that current is not NULL, which should never happen so remove that too. Idle task's exclusion must be performed from the core code, on top of perf_event_attr:exclude_idle. Signed-off-by: NAnton Blanchard <anton@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mundt <lethal@linux-sh.org> LKML-Reference: <20100118054707.GT12666@kryten> Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
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- 25 1月, 2010 7 次提交
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由 Wei Yongjun 提交于
In function kvm_arch_vcpu_init(), if the memory malloc for vcpu->arch.mce_banks is fail, it does not free the memory of lapic date. This patch fixed it. Cc: stable@kernel.org Signed-off-by: NWei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Wei Yongjun 提交于
vcpu->arch.mce_banks is malloc in kvm_arch_vcpu_init(), but never free in any place, this may cause memory leak. So this patch fixed to free it in kvm_arch_vcpu_uninit(). Cc: stable@kernel.org Signed-off-by: NWei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Christian Borntraeger 提交于
kvm_handle_sie_intercept uses a jump table to get the intercept handler for a SIE intercept. Static code analysis revealed a potential problem: the intercept_funcs jump table was defined to contain (0x48 >> 2) entries, but we only checked for code > 0x48 which would cause an off-by-one array overflow if code == 0x48. Use the compiler and ARRAY_SIZE to automatically set the limits. Cc: stable@kernel.org Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Marcelo Tosatti 提交于
Exit the guest pagetable walk loop if reading gpte failed. Otherwise its possible to enter an endless loop processing the previous present pte. Cc: stable@kernel.org Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Sheng Yang 提交于
When found a error hva, should not return PAGE_SIZE but the level... Also clean up the coding style of the following loop. Cc: stable@kernel.org Signed-off-by: NSheng Yang <sheng@linux.intel.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Alexander Graf 提交于
Embedded PowerPC KVM has an exit timing implementation to track and evaluate how much time was spent in which exit path. For Book3S, we don't implement it. So let's not expose it as a config option either. Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
When we queue an interrupt to the local apic, we set the IRR before the TMR. The vcpu can pick up the IRR and inject the interrupt before setting the TMR, and perhaps even EOI it, causing incorrect behaviour. The race is really insignificant since it can only occur on the first interrupt (usually following interrupts will not change TMR), but it's better closed than open. Fixed by reordering setting the TMR vs IRR. Cc: stable@kernel.org Signed-off-by: NAvi Kivity <avi@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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- 22 1月, 2010 2 次提交
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由 Tero Kristo 提交于
OMAP GP timers keep running for a few cycles after they are stopped, which can cause the timer to expire and generate an interrupt. The pending interrupt will prevent e.g. OMAP from entering suspend, thus we ack it manually. Only applicable on OMAP2/3/4. Signed-off-by: NTero Kristo <tero.kristo@nokia.com> Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com> Signed-off-by: NTony Lindgren <tony@atomide.com>
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由 Peter Korsgaard 提交于
Commit cfc38999f (backlight: Pass device through notify callback) added a struct device argument to the notify callback, but didn't update the user of it in mach-hmt.c Signed-off-by: NPeter Korsgaard <jacmet@sunsite.dk> Signed-off-by: NBen Dooks <ben-linux@fluff.org>
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- 21 1月, 2010 10 次提交
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由 Stephane Eranian 提交于
Propagate the ANY bit into the fixed counter config for v3 and higher. Signed-off-by: NStephane Eranian <eranian@google.com> [a.p.zijlstra@chello.nl: split from larger patch] Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <4b5430c6.0f975e0a.1bf9.ffff85fe@mx.google.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 David S. Miller 提交于
As noted by Benjamin Herrenschmidt, the generic IRQ layer only sets irq_desc[irq].affinity after ->set_affinity() succeeds. So we have to use the passed in cpumask. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Anton Blanchard 提交于
pcibus_to_node can return -1 if we cannot determine which node a pci bus is on. If passed -1, cpumask_of_node will negatively index the lookup array and pull in random data: # cat /sys/devices/pci0000:00/0000:00:01.0/local_cpus 00000000,00000003,00000000,00000000 # cat /sys/devices/pci0000:00/0000:00:01.0/local_cpulist 64-65 Change cpumask_of_node to check for -1 and return cpu_all_mask in this case: # cat /sys/devices/pci0000:00/0000:00:01.0/local_cpus ffffffff,ffffffff,ffffffff,ffffffff # cat /sys/devices/pci0000:00/0000:00:01.0/local_cpulist 0-127 Signed-off-by: NAnton Blanchard <anton@samba.org> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Sergio Aguirre 提交于
Fix following warning when CONFIG_DEBUG_FS wasn't selected: arch/arm/mach-omap2/pm-debug.c:57: warning: 'pm_dbg_init' declared 'static' but never defined Signed-off-by: NSergio Aguirre <saaguirre@ti.com> Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>
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由 Subramani Venkatesh 提交于
Currently, DSS does not wakeup when there is a DMA request. DSS wake up event must be enabled so that the DMA request to refill the FIFO will wake up the CORE domain. Signed-off-by: NSubramani Venkatesh <subramani.venkatesh@windriver.com> Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>
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由 Kevin Hilman 提交于
During suspend, the kernel timekeeping subsystem is shut down. Before suspend and upon resume, it uses a weak function read_persistent_clock() to determine the amount of time that elapsed during suspend. This function was not implemented on OMAP, so from the timekeeping subsystem perspective (and thus userspace as well) it appeared that no time elapsed during suspend. This patch uses the 32k sync timer as a the persistent clock. NOTE: This does *NOT* fully handle wrapping of the 32k sync timer, so more than one wrapping of the 32k sync timer during suspend may cause problems. Also note there are not interrupts when the 32k sync timer wraps, so something else has to be done. Reported-by: NJon Hunter <jon-hunter@ti.com> Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>
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由 Tero Kristo 提交于
Due to OMAP3 erratas 1.157, 1.185 the save of the last pad register (ETK_D14 and ETK_D15) can fail sometimes when there is simultaneous OCP access to the SCM register area. Fixed by writing the last register to the save area. Also, optimized the delay loop for the HW save to include an udelay(1), which limits the number of unnecessary HW accesses to SCM register area during the save. Signed-off-by: NTero Kristo <tero.kristo@nokia.com> Acked-by: NNishanth Menon <nm@ti.com> Reviewed-by: NAnand Gadiyar <gadiyar@ti.com> Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>
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由 Roel Kluin 提交于
val is an u64 pointer, we need an int to check the error. Signed-off-by: NRoel Kluin <roel.kluin@gmail.com> Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>
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由 Peter Ujfalusi 提交于
Wake-up from McBSP ports are needed, especially when the THRESHOLD dma mode is in use for audio playback. Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@nokia.com> Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>
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由 Manjunatha GK 提交于
The PM debug code fails to build on when CONFIG_DEBUG_FS is not enabled. Build error log: arch/arm/mach-omap2/built-in.o: In function `omap_sram_idle': arch/arm/mach-omap2/pm34xx.c:449: undefined reference to `pm_dbg_regset_save' arch/arm/mach-omap2/pm34xx.c:460: undefined reference to `pm_dbg_regset_save' arch/arm/mach-omap2/built-in.o: In function `configure_vc': arch/arm/mach-omap2/pm34xx.c:1237: undefined reference to `pm_dbg_regset_init' arch/arm/mach-omap2/pm34xx.c:1238: undefined reference to `pm_dbg_regset_init' make: *** [.tmp_vmlinux1] Error 1 This patch fixes the above errors. Kernel booting is tested on omap zoom2 and zoom3 boards. Signed-off-by: NManjunatha GK <manjugk@ti.com> Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>
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