search for: smpboot

...or IST stacks. To make these vectors work the TSS and the getcpu GDT entry need to be set up before the IDT is loaded. Signed-off-by: Joerg Roedel <jroedel at suse.de> --- arch/x86/include/asm/processor.h | 1 + arch/x86/kernel/cpu/common.c | 23 +++++++++++++++++++++++ arch/x86/kernel/smpboot.c | 2 +- 3 files changed, 25 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index d8a82e650810..5ac507586769 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -696,6 +696,7 @@ extern void...

>From: Tristan Gingold >Sent: 2006年5月23日 15:30 > >Le Lundi 22 Mai 2006 17:44, Keir Fraser a écrit : >> On 22 May 2006, at 08:57, Tristan Gingold wrote: >> > this patch creates a new file: cpuhotplug.c. The content is the >xenbus >> > handler part of smpboot.c. The purpose is to be able to share this >> > part with >> > other architectures. >> > >> > Tested by compiling on i386. >> >> This raises the obvious question: why don''t you use the rest of our >> smpboot.c to implement SMP bringup?...

...35-70-joro at 8bytes.org --- arch/x86/include/asm/processor.h | 7 ++++++ arch/x86/include/asm/setup.h | 1 + arch/x86/kernel/cpu/common.c | 37 +++++++++++++++++++------------- arch/x86/kernel/head64.c | 11 ++++++++++ arch/x86/kernel/head_64.S | 5 +++++ arch/x86/kernel/smpboot.c | 6 ++++++ 6 files changed, 52 insertions(+), 15 deletions(-) diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index 97143d87994c..2cc72d583003 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -697,6 +697,13 @@ exter...

...irt_spin_lock() a pvops function Juergen Gross (2): paravirt/locks: use new static key for controlling call of virt_spin_lock() paravirt,xen: correct xen_nopvspin case arch/x86/include/asm/qspinlock.h | 11 +++++++++++ arch/x86/kernel/paravirt-spinlocks.c | 6 ++++++ arch/x86/kernel/smpboot.c | 2 ++ arch/x86/xen/spinlock.c | 2 ++ kernel/locking/qspinlock.c | 4 ++++ 5 files changed, 25 insertions(+) -- 2.12.3

...irt_spin_lock() a pvops function Juergen Gross (2): paravirt/locks: use new static key for controlling call of virt_spin_lock() paravirt,xen: correct xen_nopvspin case arch/x86/include/asm/qspinlock.h | 11 +++++++++++ arch/x86/kernel/paravirt-spinlocks.c | 6 ++++++ arch/x86/kernel/smpboot.c | 2 ++ arch/x86/xen/spinlock.c | 2 ++ kernel/locking/qspinlock.c | 4 ++++ 5 files changed, 25 insertions(+) -- 2.12.3

As suggested by Andi Kleen, don't allocate a GDT page if there is already one present. Needed for CPU hotplug. Signed-off-by: Zachary Amsden <zach@vmware.com> Index: linux-2.6.14-rc1/arch/i386/kernel/smpboot.c =================================================================== --- linux-2.6.14-rc1.orig/arch/i386/kernel/smpboot.c 2005-09-20 20:38:22.000000000 -0700 +++ linux-2.6.14-rc1/arch/i386/kernel/smpboot.c 2005-09-28 12:54:08.000000000 -0700 @@ -898,7 +898,8 @@ static int __devinit do_boot_cpu(int...

As suggested by Andi Kleen, don't allocate a GDT page if there is already one present. Needed for CPU hotplug. Signed-off-by: Zachary Amsden <zach@vmware.com> Index: linux-2.6.14-rc1/arch/i386/kernel/smpboot.c =================================================================== --- linux-2.6.14-rc1.orig/arch/i386/kernel/smpboot.c 2005-09-20 20:38:22.000000000 -0700 +++ linux-2.6.14-rc1/arch/i386/kernel/smpboot.c 2005-09-28 12:54:08.000000000 -0700 @@ -898,7 +898,8 @@ static int __devinit do_boot_cpu(int...

...s work the TSS and the getcpu GDT entry need > to be set up before the IDT is loaded. > > Signed-off-by: Joerg Roedel <jroedel at suse.de> > --- > arch/x86/include/asm/processor.h | 1 + > arch/x86/kernel/cpu/common.c | 23 +++++++++++++++++++++++ > arch/x86/kernel/smpboot.c | 2 +- > 3 files changed, 25 insertions(+), 1 deletion(-) > > diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h > index d8a82e650810..5ac507586769 100644 > --- a/arch/x86/include/asm/processor.h > +++ b/arch/x86/include/asm/processor.h &g...

...irt_spin_lock() a pvops function Juergen Gross (2): paravirt/locks: use new static key for controlling call of virt_spin_lock() paravirt,xen: correct xen_nopvspin case arch/x86/include/asm/qspinlock.h | 11 ++++++++++- arch/x86/kernel/paravirt-spinlocks.c | 6 ++++++ arch/x86/kernel/smpboot.c | 2 ++ arch/x86/xen/spinlock.c | 2 ++ kernel/locking/qspinlock.c | 4 ++++ 5 files changed, 24 insertions(+), 1 deletion(-) -- 2.12.3

...irt_spin_lock() a pvops function Juergen Gross (2): paravirt/locks: use new static key for controlling call of virt_spin_lock() paravirt,xen: correct xen_nopvspin case arch/x86/include/asm/qspinlock.h | 11 ++++++++++- arch/x86/kernel/paravirt-spinlocks.c | 6 ++++++ arch/x86/kernel/smpboot.c | 2 ++ arch/x86/xen/spinlock.c | 2 ++ kernel/locking/qspinlock.c | 4 ++++ 5 files changed, 24 insertions(+), 1 deletion(-) -- 2.12.3

Current kernel, and I just booted, and dmesg shows, of the 32 cores, 0, 2, 4 and 6 ok, and *all* other show "is now offline. What's happening here? mark

m.roth at 5-cent.us wrote: > Current kernel, and I just booted, and dmesg shows, of the 32 cores, 0, 2, > 4 and 6 ok, and *all* other show "is now offline. > > What's happening here? > A followup: I also find a core in /var/spool/abrt, and "reason" is kernel BUG at mm/slub.c:3601! In googling, I see threads about incorrect calculation of slabs. Following one

m.roth at 5-cent.us wrote: > m.roth at 5-cent.us wrote: >> Current kernel, and I just booted, and dmesg shows, of the 32 cores, 0, >> 2, 4 and 6 ok, and *all* other show "is now offline. >> >> What's happening here? <snip> Ok, more info. I found how to online a CPU - echo 1 > /sys/devices/system/cpu/cpu23/online Perhaps I should have started with 1,3,

...pu, true); - - this_cpu_write(cpu_state, CPU_ONLINE); - - wmb(); - - /* We can take interrupts now: we're officially "up". */ - local_irq_enable(); - - wmb(); /* make sure everything is out */ } static void __cpuinit cpu_bringup_and_idle(void) { - cpu_bringup(); - cpu_idle(); + smpboot_start_secondary(NULL); } static int xen_smp_intr_init(unsigned int cpu) @@ -515,6 +500,8 @@ static const struct smp_ops xen_smp_ops __initconst = { .smp_prepare_cpus = xen_smp_prepare_cpus, .smp_cpus_done = xen_smp_cpus_done, + .cpu_pre_starting = xen_cpu_pre_starting, + .cpu_up = xen_c...

...pu, true); - - this_cpu_write(cpu_state, CPU_ONLINE); - - wmb(); - - /* We can take interrupts now: we're officially "up". */ - local_irq_enable(); - - wmb(); /* make sure everything is out */ } static void __cpuinit cpu_bringup_and_idle(void) { - cpu_bringup(); - cpu_idle(); + smpboot_start_secondary(NULL); } static int xen_smp_intr_init(unsigned int cpu) @@ -515,6 +500,8 @@ static const struct smp_ops xen_smp_ops __initconst = { .smp_prepare_cpus = xen_smp_prepare_cpus, .smp_cpus_done = xen_smp_cpus_done, + .cpu_pre_starting = xen_cpu_pre_starting, + .cpu_up = xen_c...

...elevant bits below: Loading Xen 4.6.3-12.el7 ... Loading Linux 4.9.20-26.el7.x86_64 ... Loading initial ramdisk ... [ 0.000000] Linux version 4.9.20-26.el7.x86_64 (mockbuild@) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-11) (GCC) ) #1 SMP Tue Apr 4 11:19:26 CDT 2017 <snip> [ 6.195089] smpboot: Max logical packages: 1 [ 6.199549] VPMU disabled by hypervisor. [ 6.203663] Performance Events: SandyBridge events, PMU not available due to virtualization, using software events only. [ 6.215436] NMI watchdog: disabled (cpu0): hardware events not enabled [ 6.222139] NMI watchdog: Shu...

...be used for restarting APs after they have been offlined. Remove the '0' from the name to reflect that. Signed-off-by: Joerg Roedel <jroedel at suse.de> --- arch/x86/include/asm/cpu.h | 2 +- arch/x86/kernel/head_32.S | 4 ++-- arch/x86/kernel/head_64.S | 6 +++--- arch/x86/kernel/smpboot.c | 4 ++-- 4 files changed, 8 insertions(+), 8 deletions(-) diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h index da78ccbd493b..1536b607971f 100644 --- a/arch/x86/include/asm/cpu.h +++ b/arch/x86/include/asm/cpu.h @@ -29,7 +29,7 @@ struct x86_cpu { #ifdef CONFIG_HOTPLUG_CPU...

...erg Roedel <jroedel at suse.de> Reviewed-by: Kees Cook <keescook at chromium.org> Link: https://lore.kernel.org/r/20200724160336.5435-72-joro at 8bytes.org --- arch/x86/include/asm/cpu.h | 2 +- arch/x86/kernel/head_32.S | 4 ++-- arch/x86/kernel/head_64.S | 6 +++--- arch/x86/kernel/smpboot.c | 4 ++-- 4 files changed, 8 insertions(+), 8 deletions(-) diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h index da78ccbd493b..1536b607971f 100644 --- a/arch/x86/include/asm/cpu.h +++ b/arch/x86/include/asm/cpu.h @@ -29,7 +29,7 @@ struct x86_cpu { #ifdef CONFIG_HOTPLUG_CPU...

...y controlling whether virt_spin_lock() should be called or not. When running on bare metal set the new key to false. Signed-off-by: Juergen Gross <jgross at suse.com> --- arch/x86/include/asm/qspinlock.h | 11 +++++++++++ arch/x86/kernel/paravirt-spinlocks.c | 6 ++++++ arch/x86/kernel/smpboot.c | 2 ++ kernel/locking/qspinlock.c | 4 ++++ 4 files changed, 23 insertions(+) diff --git a/arch/x86/include/asm/qspinlock.h b/arch/x86/include/asm/qspinlock.h index 48a706f641f2..fc39389f196b 100644 --- a/arch/x86/include/asm/qspinlock.h +++ b/arch/x86/include/asm/qspinlo...

...al_ dualproc xeon mobos (same bios/ipmi versions, they even share an enclosure, one is right side, other is left), each with different cpu/memory: Using 4.9.13 with vcpu limited to 4, early in the boot process, the one that _was_ booting before setting the xen vcpu args says: "[ 7.060720] smpboot: Max logical packages: 2", and the other one says "[ 6.195089] smpboot: Max logical packages: 1" They both have dual procs, known working/good. The first (the one that worked unmodified) has dual 8 core (16 HT/ea) and correctly detects "[ 0.000000] smpboot: Allowi...