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2009-07-01xen: Use kcalloc() in xen_init_IRQ()Pekka Enberg1-2/+2
The init_IRQ() function is now called with slab allocator initialized. Therefore, we must not use the bootmem allocator in xen_init_IRQ(). Fixes the following boot-time warning: ------------[ cut here ]------------ WARNING: at mm/bootmem.c:535 alloc_arch_preferred_bootmem+0x27/0x45() Modules linked in: Pid: 0, comm: swapper Not tainted 2.6.30 #1 Call Trace: [<ffffffff8102d6e3>] ? warn_slowpath_common+0x73/0xb0 [<ffffffff810210d9>] ? pvclock_clocksource_read+0x49/0x90 [<ffffffff812e522f>] ? alloc_arch_preferred_bootmem+0x27/0x45 [<ffffffff812e5761>] ? ___alloc_bootmem_nopanic+0x39/0xc9 [<ffffffff812e57fa>] ? ___alloc_bootmem+0x9/0x2f [<ffffffff812e9e21>] ? xen_init_IRQ+0x25/0x61 [<ffffffff812d69ee>] ? start_kernel+0x1b5/0x29e ---[ end trace 4eaa2a86a8e2da22 ]--- Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Tested-by: Christian Kujau <lists@nerdbynature.de> Reported-by: Christian Kujau <lists@nerdbynature.de> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: lists@nerdbynature.de Cc: jeremy.fitzhardinge@citrix.com LKML-Reference: <1246438278.22417.28.camel@penberg-laptop> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-12PM core: rename suspend and resume functionsAlan Stern1-8/+8
This patch (as1241) renames a bunch of functions in the PM core. Rather than go through a boring list of name changes, suffice it to say that in the end we have a bunch of pairs of functions: device_resume_noirq dpm_resume_noirq device_resume dpm_resume device_complete dpm_complete device_suspend_noirq dpm_suspend_noirq device_suspend dpm_suspend device_prepare dpm_prepare in which device_X does the X operation on a single device and dpm_X invokes device_X for all devices in the dpm_list. In addition, the old dpm_power_up and device_resume_noirq have been combined into a single function (dpm_resume_noirq). Lastly, dpm_suspend_start and dpm_resume_end are the renamed versions of the former top-level device_suspend and device_resume routines. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Acked-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2009-06-12PM: Rename device_power_down/up()Magnus Damm1-5/+5
Rename the functions performing "_noirq" dev_pm_ops operations from device_power_down() and device_power_up() to device_suspend_noirq() and device_resume_noirq(). The new function names are chosen to show that the functions are responsible for calling the _noirq() versions to finalize the suspend/resume operation. The current function names do not perform power down/up anymore so the names may be misleading. Global function renames: - device_power_down() -> device_suspend_noirq() - device_power_up() -> device_resume_noirq() Static function renames: - suspend_device_noirq() -> __device_suspend_noirq() - resume_device_noirq() -> __device_resume_noirq() Signed-off-by: Magnus Damm <damm@igel.co.jp> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Acked-by: Len Brown <lenb@kernel.org> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2009-06-10Merge branch 'x86-xen-for-linus' of ↵Linus Torvalds9-58/+1015
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-xen-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (42 commits) xen: cache cr0 value to avoid trap'n'emulate for read_cr0 xen/x86-64: clean up warnings about IST-using traps xen/x86-64: fix breakpoints and hardware watchpoints xen: reserve Xen start_info rather than e820 reserving xen: add FIX_TEXT_POKE to fixmap lguest: update lazy mmu changes to match lguest's use of kvm hypercalls xen: honour VCPU availability on boot xen: add "capabilities" file xen: drop kexec bits from /sys/hypervisor since kexec isn't implemented yet xen/sys/hypervisor: change writable_pt to features xen: add /sys/hypervisor support xen/xenbus: export xenbus_dev_changed xen: use device model for suspending xenbus devices xen: remove suspend_cancel hook xen/dev-evtchn: clean up locking in evtchn xen: export ioctl headers to userspace xen: add /dev/xen/evtchn driver xen: add irq_from_evtchn xen: clean up gate trap/interrupt constants xen: set _PAGE_NX in __supported_pte_mask before pagetable construction ...
2009-05-12Merge branch 'x86/apic' into irq/numaIngo Molnar1-1/+2
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 <mingo@elte.hu>
2009-05-08Merge branch 'x86/urgent' into x86/xenIngo Molnar1-1/+2
Conflicts: arch/frv/include/asm/pgtable.h arch/x86/include/asm/required-features.h arch/x86/xen/mmu.c Merge reason: x86/xen was on a .29 base still, move it to a fresher branch and pick up Xen fixes as well, plus resolve conflicts Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-05[IA64] xen_domu_defconfig: fix build issues/warningsJan Beulich1-1/+2
- drivers/xen/events.c did not compile - xen_setup_hook caused a modpost section warning - the use of u64 (instead of unsigned long long) together with a %llu in drivers/xen/balloon.c caused a compiler warning Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2009-04-28x86/irq: change irq_desc_alloc() to take node instead of cpuYinghai Lu1-1/+1
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 <yinghai@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Suresh Siddha <suresh.b.siddha@intel.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jeremy Fitzhardinge <jeremy@goop.org> LKML-Reference: <49F65536.2020300@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-28irq: change ->set_affinity() to return statusYinghai Lu1-5/+7
according to Ingo, change set_affinity() in irq_chip should return int, because that way we can handle failure cases in a much cleaner way, in the genirq layer. v2: fix two typos [ Impact: extend API ] Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Suresh Siddha <suresh.b.siddha@intel.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: linux-arch@vger.kernel.org LKML-Reference: <49F654E9.4070809@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-08xen: honour VCPU availability on bootIan Campbell1-10/+30
If a VM is booted with offline VCPUs then unplug them during boot. Determining the availability of a VCPU requires access to XenStore which is not available at the point smp_prepare_cpus() is called, therefore we bring up all VCPUS initially and unplug the offline ones as soon as XenStore becomes available. Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
2009-04-08xen: resume interrupts before system devices.Ian Campbell1-2/+3
Impact: bugfix Xen domain restore Otherwise the first timer interrupt after resume is missed and we never get another. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-04-07Merge commit 'origin/master' into for-linus/xen/masterJeremy Fitzhardinge3-9/+12
* commit 'origin/master': (4825 commits) Fix build errors due to CONFIG_BRANCH_TRACER=y parport: Use the PCI IRQ if offered tty: jsm cleanups Adjust path to gpio headers KGDB_SERIAL_CONSOLE check for module Change KCONFIG name tty: Blackin CTS/RTS Change hardware flow control from poll to interrupt driven Add support for the MAX3100 SPI UART. lanana: assign a device name and numbering for MAX3100 serqt: initial clean up pass for tty side tty: Use the generic RS485 ioctl on CRIS tty: Correct inline types for tty_driver_kref_get() splice: fix deadlock in splicing to file nilfs2: support nanosecond timestamp nilfs2: introduce secondary super block nilfs2: simplify handling of active state of segments nilfs2: mark minor flag for checkpoint created by internal operation nilfs2: clean up sketch file nilfs2: super block operations fix endian bug ... Conflicts: arch/x86/include/asm/thread_info.h arch/x86/lguest/boot.c drivers/xen/manage.c
2009-04-07Merge branch 'for-linus/xen/core' into for-linus/xen/masterJeremy Fitzhardinge1-10/+30
* for-linus/xen/core: xen: honour VCPU availability on boot
2009-04-05Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumaskLinus Torvalds1-2/+2
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask: (36 commits) cpumask: remove cpumask allocation from idle_balance, fix numa, cpumask: move numa_node_id default implementation to topology.h, fix cpumask: remove cpumask allocation from idle_balance x86: cpumask: x86 mmio-mod.c use cpumask_var_t for downed_cpus x86: cpumask: update 32-bit APM not to mug current->cpus_allowed x86: microcode: cleanup x86: cpumask: use work_on_cpu in arch/x86/kernel/microcode_core.c cpumask: fix CONFIG_CPUMASK_OFFSTACK=y cpu hotunplug crash numa, cpumask: move numa_node_id default implementation to topology.h cpumask: convert node_to_cpumask_map[] to cpumask_var_t cpumask: remove x86 cpumask_t uses. cpumask: use cpumask_var_t in uv_flush_tlb_others. cpumask: remove cpumask_t assignment from vector_allocation_domain() cpumask: make Xen use the new operators. cpumask: clean up summit's send_IPI functions cpumask: use new cpumask functions throughout x86 x86: unify cpu_callin_mask/cpu_callout_mask/cpu_initialized_mask/cpu_sibling_setup_mask cpumask: convert struct cpuinfo_x86's llc_shared_map to cpumask_var_t cpumask: convert node_to_cpumask_map[] to cpumask_var_t x86: unify 32 and 64-bit node_to_cpumask_map ...
2009-04-03Merge branch 'for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (28 commits) trivial: Update my email address trivial: NULL noise: drivers/mtd/tests/mtd_*test.c trivial: NULL noise: drivers/media/dvb/frontends/drx397xD_fw.h trivial: Fix misspelling of "Celsius". trivial: remove unused variable 'path' in alloc_file() trivial: fix a pdlfush -> pdflush typo in comment trivial: jbd header comment typo fix for JBD_PARANOID_IOFAIL trivial: wusb: Storage class should be before const qualifier trivial: drivers/char/bsr.c: Storage class should be before const qualifier trivial: h8300: Storage class should be before const qualifier trivial: fix where cgroup documentation is not correctly referred to trivial: Give the right path in Documentation example trivial: MTD: remove EOL from MODULE_DESCRIPTION trivial: Fix typo in bio_split()'s documentation trivial: PWM: fix of #endif comment trivial: fix typos/grammar errors in Kconfig texts trivial: Fix misspelling of firmware trivial: cgroups: documentation typo and spelling corrections trivial: Update contact info for Jochen Hein trivial: fix typo "resgister" -> "register" ...
2009-04-02xen: honour VCPU availability on bootIan Campbell1-10/+30
If a VM is booted with offline VCPUs then unplug them during boot. Determining the availability of a VCPU requires access to XenStore which is not available at the point smp_prepare_cpus() is called, therefore we bring up all VCPUS initially and unplug the offline ones as soon as XenStore becomes available. Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
2009-03-31Merge branch 'cpumask-for-linus' of ↵Rusty Russell1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip Conflicts: arch/x86/include/asm/topology.h drivers/oprofile/buffer_sync.c (Both cases: changed in Linus' tree, removed in Ingo's).
2009-03-30PM: Rework handling of interrupts during suspend-resumeRafael J. Wysocki1-7/+9
Use the functions introduced in by the previous patch, suspend_device_irqs(), resume_device_irqs() and check_wakeup_irqs(), to rework the handling of interrupts during suspend (hibernation) and resume. Namely, interrupts will only be disabled on the CPU right before suspending sysdevs, while device drivers will be prevented from receiving interrupts, with the help of the new helper function, before their "late" suspend callbacks run (and analogously during resume). In addition, since the device interrups are now disabled before the CPU has turned all interrupts off and the CPU will ACK the interrupts setting the IRQ_PENDING bit for them, check in sysdev_suspend() if any wake-up interrupts are pending and abort suspend if that's the case. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Ingo Molnar <mingo@elte.hu>
2009-03-30Merge branches 'for-linus/xen/dev-evtchn', 'for-linus/xen/xenbus', ↵Jeremy Fitzhardinge9-58/+1015
'for-linus/xen/xenfs' and 'for-linus/xen/sys-hypervisor' into for-linus/xen/master * for-linus/xen/dev-evtchn: xen/dev-evtchn: clean up locking in evtchn xen: export ioctl headers to userspace xen: add /dev/xen/evtchn driver xen: add irq_from_evtchn * for-linus/xen/xenbus: xen/xenbus: export xenbus_dev_changed xen: use device model for suspending xenbus devices xen: remove suspend_cancel hook * for-linus/xen/xenfs: xen: add "capabilities" file * for-linus/xen/sys-hypervisor: xen: drop kexec bits from /sys/hypervisor since kexec isn't implemented yet xen/sys/hypervisor: change writable_pt to features xen: add /sys/hypervisor support Conflicts: drivers/xen/Makefile
2009-03-30xen: add "capabilities" fileJeremy Fitzhardinge1-1/+18
The xenfs capabilities file allows usermode to determine what capabilities the domain has. The only one at present is "control_d" in a privileged domain. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-03-30xen: drop kexec bits from /sys/hypervisor since kexec isn't implemented yetIan Campbell1-41/+0
I needed this to compile since there is no kexec yet in pvops kernel CC drivers/xen/sys-hypervisor.o drivers/xen/sys-hypervisor.c: In function 'hyper_sysfs_init': drivers/xen/sys-hypervisor.c:405: error: 'vmcoreinfo_size_xen' undeclared (first use in this function) drivers/xen/sys-hypervisor.c:405: error: (Each undeclared identifier is reported only once drivers/xen/sys-hypervisor.c:405: error: for each function it appears in.) drivers/xen/sys-hypervisor.c:406: error: implicit declaration of function 'xen_sysfs_vmcoreinfo_init' drivers/xen/sys-hypervisor.c: In function 'hyper_sysfs_exit': drivers/xen/sys-hypervisor.c:433: error: 'vmcoreinfo_size_xen' undeclared (first use in this function) drivers/xen/sys-hypervisor.c:434: error: implicit declaration of function 'xen_sysfs_vmcoreinfo_destroy' Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
2009-03-30xen/sys/hypervisor: change writable_pt to featuresJeremy Fitzhardinge1-15/+26
/sys/hypervisor/properties/writable_pt was misnamed. Rename to features, expressed as a bit array in hex. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-03-30xen: add /sys/hypervisor supportJeremy Fitzhardinge3-1/+487
Adds support for Xen info under /sys/hypervisor. Taken from Novell 2.6.27 backport tree. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-03-30xen/xenbus: export xenbus_dev_changedJeremy Fitzhardinge1-0/+1
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-03-30xen: use device model for suspending xenbus devicesIan Campbell3-33/+15
Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-03-30xen: remove suspend_cancel hookIan Campbell1-23/+0
Remove suspend_cancel hook from xenbus_driver, in preparation for using the device model for suspending. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-03-30xen/dev-evtchn: clean up locking in evtchnJeremy Fitzhardinge1-12/+25
Define a new per_user_data mutex to serialize bind/unbind operations to prevent them from racing with each other. Fix error returns and don't do a bind while holding a spinlock. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-03-30xen: add /dev/xen/evtchn driverIan Campbell3-1/+506
This driver is used by application which wish to receive notifications from the hypervisor or other guests via Xen's event channel mechanism. In particular it is used by the xenstore daemon in domain 0. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-03-30xen: add irq_from_evtchnIan Campbell1-0/+6
Given an evtchn, return the corresponding irq. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-03-30xen: resume interrupts before system devices.Ian Campbell1-3/+3
Impact: bugfix Xen domain restore Otherwise the first timer interrupt after resume is missed and we never get another. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-03-30trivial: fix typos/grammar errors in Kconfig textsMatt LaPlante1-1/+1
Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-03-13cpumask: make Xen use the new operators.Rusty Russell1-2/+2
Impact: cleanup In particular, *map are deprecated, and you have to use the accessors as *mask are const. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> To: Jeremy Fitzhardinge <jeremy@xensource.com>
2009-02-22Merge branch 'linus' into x86/apicIngo Molnar1-0/+8
Conflicts: arch/x86/mach-default/setup.c Semantic conflict resolution: arch/x86/kernel/setup.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-02-22PM: Split up sysdev_[suspend|resume] from device_power_[down|up]Rafael J. Wysocki1-0/+8
Move the sysdev_suspend/resume from the callee to the callers, with no real change in semantics, so that we can rework the disabling of interrupts during suspend/hibernation. This is based on an earlier patch from Linus. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-02-09xen: explicitly initialise the cpu field of irq_infoIan Campbell1-5/+6
I was seeing a very odd crash on 64 bit in bind_evtchn_to_cpu because cpu_from_irq(irq) was coming out as -1. I found this was coming direct from the mk_ipi_info call. It's not clear to me that this isn't a compiler bug (implicit initialisation to zero of unsigned shorts in a struct not handled correctly?). On the other hand is it true that all event channels start of bound to CPU 0? If not then -1 might be correct and the various other functions should cope with this. Signed-off-by: Ian Campbell <Ian.Campbell@eu.citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-02-09xen: make sure that softirqs get handled at the end of event processingJeremy Fitzhardinge1-20/+9
Make sure that irq_enter()/irq_exit() wrap the entire event processing loop, rather than each individual event invokation. This makes sure that softirq processing is deferred until the end of event processing, rather than in the middle with interrupts disabled. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-02-09xen: remove irq bindcountJeremy Fitzhardinge1-19/+7
There should be no need for us to maintain our own bind count for irqs, since the surrounding irq system should keep track of shared irqs for us. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-02-09xen: pack all irq-related info togetherJeremy Fitzhardinge1-49/+135
Put all irq info into one struct. Also, use a union to keep event channel type-specific information, rather than overloading the index field. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-02-09xen: use our own eventchannel->irq pathJeremy Fitzhardinge1-2/+20
Rather than overloading vectors for event channels, take full responsibility for mapping an event channel to irq directly. With this patch Xen has its own irq allocator. When the kernel gets an event channel upcall, it maps the event channel number to an irq and injects it into the normal interrupt path. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-02-09xen: set irq_chip disableJeremy Fitzhardinge1-0/+3
By default, the irq_chip.disable operation is a no-op. Explicitly set it to disable the Xen event channel. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-02-05Merge branch 'x86/urgent' into x86/apicIngo Molnar1-1/+32
Conflicts: arch/x86/mach-default/setup.c Semantic merge: arch/x86/kernel/irqinit_32.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-29xen: make sysfs files behave as their names suggestJeremy Fitzhardinge1-1/+32
1: make "target_kb" only accept and produce a memory size in kilobytes. 2: add a second "target" file which produces output in bytes, and will accept memparse input (scaled bytes) This fixes the rather irritating problem that writing the same value read back into target_kb would end up shrinking the domain by a factor of 1024, with generally bad results. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Stable Kernel <stable@kernel.org> Cc: "dan.magenheimer@oracle.com" <dan.magenheimer@oracle.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-27Merge branch 'linus' into core/percpuIngo Molnar2-6/+13
Conflicts: arch/x86/kernel/setup_percpu.c
2009-01-26xen: unitialised return value in xenbus_write_transactionIan Campbell1-6/+5
The return value of xenbus_write_transaction can be uninitialised in the success case leading to the userspace xenstore utilities failing. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-23xen: handle highmem pages correctly when shrinking a domainIan Campbell1-4/+7
Commit 1058a75f07b9bb8323fb5197be5526220f8b75cf ("xen: actually release memory when shrinking domain") causes a crash if the page being released is a highmem page. If a page is highmem then there is no need to unmap it. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Acked-by: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-22xen: actually release memory when shrinking domainDan Magenheimer1-0/+5
Fix this: > It appears that in the upstream balloon driver, > the call to HYPERVISOR_update_va_mapping is missing > from decrease_reservation. I think as a result, > the balloon driver is eating memory but not > releasing it to Xen, thus rendering the balloon > driver essentially useless. (Can be observed via xentop.) Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-12xen: fix too early kmalloc callChristophe Saout1-2/+3
Impact: fix bootup crash on xen guests SLAB is not yet up, with earlyprintk it is giving me an Oops in __kmalloc. Replace call to kmalloc() with alloc_bootmem(). Reported-by: Christophe Saout <christophe@saout.de> Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-11Xen: reduce memory required for cpu_evtchn_maskMike Travis1-5/+16
Impact: reduce memory usage. Reduce this significant gain in the amount of memory used when NR_CPUS bumped from 128 to 4096 by allocating the array based on nr_cpu_ids: 65536 +2031616 2097152 +3100% cpu_evtchn_mask(.bss) Signed-off-by: Mike Travis <travis@sgi.com> Cc: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Chris Wright <chrisw@sous-sol.org> Cc: virtualization@lists.osdl.org Cc: xen-devel@lists.xensource.com
2009-01-11cpumask: convert misc driver functionsRusty Russell1-1/+1
Impact: use new cpumask API. Convert misc driver functions to use struct cpumask. To Do: - Convert iucv_buffer_cpumask to cpumask_var_t. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com> Acked-by: Dean Nelson <dcn@sgi.com> Cc: Robert Richter <robert.richter@amd.com> Cc: oprofile-list@lists.sf.net Cc: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Chris Wright <chrisw@sous-sol.org> Cc: virtualization@lists.osdl.org Cc: xen-devel@lists.xensource.com Cc: Ursula Braun <ursula.braun@de.ibm.com> Cc: linux390@de.ibm.com Cc: linux-s390@vger.kernel.org
2009-01-11cpumask: update irq_desc to use cpumask_var_tMike Travis1-2/+2
Impact: reduce memory usage, use new cpumask API. Replace the affinity and pending_masks with cpumask_var_t's. This adds to the significant size reduction done with the SPARSE_IRQS changes. The added functions (init_alloc_desc_masks & init_copy_desc_masks) are in the include file so they can be inlined (and optimized out for the !CONFIG_CPUMASKS_OFFSTACK case.) [Naming chosen to be consistent with the other init*irq functions, as well as the backwards arg declaration of "from, to" instead of the more common "to, from" standard.] Includes a slight change to the declaration of struct irq_desc to embed the pending_mask within ifdef(CONFIG_SMP) to be consistent with other references, and some small changes to Xen. Tested: sparse/non-sparse/cpumask_offstack/non-cpumask_offstack/nonuma/nosmp on x86_64 Signed-off-by: Mike Travis <travis@sgi.com> Cc: Chris Wright <chrisw@sous-sol.org> Cc: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: virtualization@lists.osdl.org Cc: xen-devel@lists.xensource.com Cc: Yinghai Lu <yhlu.kernel@gmail.com>
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