search for: mingo

At the most recent Xen Summit, Thomas Friebel presented a paper ("Preventing Guests from Spinning Around", http://xen.org/files/xensummitboston08/LHP.pdf) investigating the interactions between spinlocks and virtual machines. Specifically, he looked at what happens when a lock-holding VCPU gets involuntarily preempted. The obvious first order effect is that while the VCPU is not

At the most recent Xen Summit, Thomas Friebel presented a paper ("Preventing Guests from Spinning Around", http://xen.org/files/xensummitboston08/LHP.pdf) investigating the interactions between spinlocks and virtual machines. Specifically, he looked at what happens when a lock-holding VCPU gets involuntarily preempted. The obvious first order effect is that while the VCPU is not

At the most recent Xen Summit, Thomas Friebel presented a paper ("Preventing Guests from Spinning Around", http://xen.org/files/xensummitboston08/LHP.pdf) investigating the interactions between spinlocks and virtual machines. Specifically, he looked at what happens when a lock-holding VCPU gets involuntarily preempted. The obvious first order effect is that while the VCPU is not

flight 13776 linux-mingo-tip-master real [real] http://www.chiark.greenend.org.uk/~xensrcts/logs/13776/ Regressions :-( Tests which did not succeed and are blocking, including tests which could not be run: test-amd64-i386-xend-winxpsp3 5 xen-boot fail REGR. vs. 12678 test-amd64-i386-xl-credit2 5 xen...

...ystem with software raid1 (in degraded mode) with one IDE 20GB drive, using kernel 2.2.19pre16 with ext3 0.0.6b. It's split like this.. 32MB /dev/hda1 /boot 2GB /dev/hda2 / ~18GB /dev/hda3 /home all partitions are marked as 0xfd (autostart raid) with the patches from http://people.redhat.com/mingo/raid-patches for 2.2.17. And I've made all the ext3 filesystems with the -j option to create a hidden journal file. Everything works great ! But. When I plug the second disk in a start a reconstruction, sooner or later within seconds I get an 'ASSERT' failure at line 411 in journal.c....

This series forms the kvm host part of paravirtual spinlock based against kvm tree. Please refer https://lkml.org/lkml/2013/8/6/178 for kvm guest part of the series. Please note that: kvm uapi: Add KICK_CPU and PV_UNHALT definition to uapi is a common patch for both guest and host. Srivatsa Vaddagiri (1): kvm hypervisor : Add a hypercall to KVM hypervisor to support pv-ticketlocks

This series forms the kvm host part of paravirtual spinlock based against kvm tree. Please refer https://lkml.org/lkml/2013/8/6/178 for kvm guest part of the series. Please note that: kvm uapi: Add KICK_CPU and PV_UNHALT definition to uapi is a common patch for both guest and host. Srivatsa Vaddagiri (1): kvm hypervisor : Add a hypercall to KVM hypervisor to support pv-ticketlocks

mb() typically uses mfence on modern x86, but a micro-benchmark shows that it's 2 to 3 times slower than lock; addl that we use on older CPUs. So we really should use the locked variant everywhere, except that intel manual says that clflush is only ordered by mfence, so we can't. Note: some callers of clflush seems to assume sfence will order it, so there could be existing bugs around

mb() typically uses mfence on modern x86, but a micro-benchmark shows that it's 2 to 3 times slower than lock; addl that we use on older CPUs. So we really should use the locked variant everywhere, except that intel manual says that clflush is only ordered by mfence, so we can't. Note: some callers of clflush seems to assume sfence will order it, so there could be existing bugs around

...Date: Sun, May 31, 2009 at 1:28 AM Subject: BUG: Documentation/lguest/lguest.c bad paths for includes cause make to fail To: mm-commits at vger.kernel.org, kraai at ftbfs.org, rusty at rustcorp.com.au, Andi Kleen <ak at suse.de>, Thomas Gleixner <tglx at linutronix.de>, Ingo Molnar <mingo at elte.hu> 2.6.28-rc2-mm1 make fails at Documentation/lguest/lguest.c ?Two includes have bad paths: line 34 #include <zlib.h> (maybe should be linux/zlib.h?), and line 47 #include "asm-x86/bootparam.h" Are incorrect paths related to this recent gitignore of lguest.c (see firs...

...Date: Sun, May 31, 2009 at 1:28 AM Subject: BUG: Documentation/lguest/lguest.c bad paths for includes cause make to fail To: mm-commits at vger.kernel.org, kraai at ftbfs.org, rusty at rustcorp.com.au, Andi Kleen <ak at suse.de>, Thomas Gleixner <tglx at linutronix.de>, Ingo Molnar <mingo at elte.hu> 2.6.28-rc2-mm1 make fails at Documentation/lguest/lguest.c ?Two includes have bad paths: line 34 #include <zlib.h> (maybe should be linux/zlib.h?), and line 47 #include "asm-x86/bootparam.h" Are incorrect paths related to this recent gitignore of lguest.c (see firs...

Switch to use hypervisor_cpuid_base() to detect Xen. Cc: Konrad Rzeszutek Wilk <konrad.wilk at oracle.com> Cc: Jeremy Fitzhardinge <jeremy at goop.org> Cc: Thomas Gleixner <tglx at linutronix.de> Cc: Ingo Molnar <mingo at redhat.com> Cc: "H. Peter Anvin" <hpa at zytor.com> Cc: x86 at kernel.org Cc: Paolo Bonzini <pbonzini at redhat.com> Cc: xen-devel at lists.xensource.com Cc: virtualization at lists.linux-foundation.org Signed-off-by: Jason Wang <jasowang at redhat.com> --- arch/x...

Switch to use hypervisor_cpuid_base() to detect Xen. Cc: Konrad Rzeszutek Wilk <konrad.wilk at oracle.com> Cc: Jeremy Fitzhardinge <jeremy at goop.org> Cc: Thomas Gleixner <tglx at linutronix.de> Cc: Ingo Molnar <mingo at redhat.com> Cc: "H. Peter Anvin" <hpa at zytor.com> Cc: x86 at kernel.org Cc: Paolo Bonzini <pbonzini at redhat.com> Cc: xen-devel at lists.xensource.com Cc: virtualization at lists.linux-foundation.org Signed-off-by: Jason Wang <jasowang at redhat.com> --- arch/x...

Switch to use hypervisor_cpuid_base() to detect Xen. Cc: Konrad Rzeszutek Wilk <konrad.wilk at oracle.com> Cc: Jeremy Fitzhardinge <jeremy at goop.org> Cc: Thomas Gleixner <tglx at linutronix.de> Cc: Ingo Molnar <mingo at redhat.com> Cc: "H. Peter Anvin" <hpa at zytor.com> Cc: x86 at kernel.org Cc: Paolo Bonzini <pbonzini at redhat.com> Cc: xen-devel at lists.xensource.com Cc: virtualization at lists.linux-foundation.org Signed-off-by: Jason Wang <jasowang at redhat.com> --- arch/x...

On Fri, Oct 20, 2017 at 1:26 AM, Ingo Molnar <mingo at kernel.org> wrote: > > * Thomas Garnier <thgarnie at google.com> wrote: > >> Change the assembly code to use only relative references of symbols for the >> kernel to be PIE compatible. >> >> Position Independent Executable (PIE) support will allow to ext...

On Fri, Oct 20, 2017 at 1:26 AM, Ingo Molnar <mingo at kernel.org> wrote: > > * Thomas Garnier <thgarnie at google.com> wrote: > >> Change the assembly code to use only relative references of symbols for the >> kernel to be PIE compatible. >> >> Position Independent Executable (PIE) support will allow to ext...

Add a way to disable the timer IRQ routing check via a boot option. The VMI timer code uses this to avoid triggering the pester Mingo code, which probes for some very unusual and broken motherboard routings. It fires 100% of the time when using a paravirtual delay mechanism instead of using a realtime delay, since there is no elapsed real time, and the 4 timer IRQs have not yet been delivered. In addition, it is entirely possib...

Add a way to disable the timer IRQ routing check via a boot option. The VMI timer code uses this to avoid triggering the pester Mingo code, which probes for some very unusual and broken motherboard routings. It fires 100% of the time when using a paravirtual delay mechanism instead of using a realtime delay, since there is no elapsed real time, and the 4 timer IRQs have not yet been delivered. In addition, it is entirely possib...

hi Ingo, please consider pulling thanks, jirka The following changes since commit 3617660e4e1618a888a2e3a4067224534302cb33: Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf into perf/core (2014-05-01 08:24:59 +0200) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git tags/perf-core-for-mingo for you to fetch changes up to 73a31b7c6a85e2f033524058bad5...

hi Ingo, please consider pulling thanks, jirka The following changes since commit 3617660e4e1618a888a2e3a4067224534302cb33: Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf into perf/core (2014-05-01 08:24:59 +0200) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git tags/perf-core-for-mingo for you to fetch changes up to 73a31b7c6a85e2f033524058bad5...