similar to: [PATCH] x86/paravirt: Add missing noinstr to arch_local*() helpers

On Thu, Aug 06, 2020 at 09:47:23AM +0200, Marco Elver wrote: > Testing my hypothesis that raw then nested non-raw > local_irq_save/restore() breaks IRQ state tracking -- see the reproducer > below. This is at least 1 case I can think of that we're bound to hit. Aaargh! > diff --git a/init/main.c b/init/main.c > index 15bd0efff3df..0873319dcff4 100644 > --- a/init/main.c

On 11.08.20 09:41, Peter Zijlstra wrote: > On Fri, Aug 07, 2020 at 05:19:03PM +0200, Marco Elver wrote: > >> My hypothesis here is simply that kvm_wait() may be called in a place >> where we get the same case I mentioned to Peter, >> >> raw_local_irq_save(); /* or other IRQs off without tracing */ >> ... >> kvm_wait() /* IRQ state tracing gets confused

On 11.08.20 09:41, Peter Zijlstra wrote: > On Fri, Aug 07, 2020 at 05:19:03PM +0200, Marco Elver wrote: > >> My hypothesis here is simply that kvm_wait() may be called in a place >> where we get the same case I mentioned to Peter, >> >> raw_local_irq_save(); /* or other IRQs off without tracing */ >> ... >> kvm_wait() /* IRQ state tracing gets confused

On 07.08.20 13:38, Marco Elver wrote: > On Fri, Aug 07, 2020 at 12:35PM +0200, J?rgen Gro? wrote: >> On 07.08.20 11:50, Marco Elver wrote: >>> On Fri, Aug 07, 2020 at 11:24AM +0200, J?rgen Gro? wrote: >>>> On 07.08.20 11:01, Marco Elver wrote: >>>>> On Thu, 6 Aug 2020 at 18:06, Marco Elver <elver at google.com> wrote: >>>>>> On

On 07.08.20 11:50, Marco Elver wrote: > On Fri, Aug 07, 2020 at 11:24AM +0200, J?rgen Gro? wrote: >> On 07.08.20 11:01, Marco Elver wrote: >>> On Thu, 6 Aug 2020 at 18:06, Marco Elver <elver at google.com> wrote: >>>> On Thu, 6 Aug 2020 at 15:17, Marco Elver <elver at google.com> wrote: >>>>> On Thu, Aug 06, 2020 at 01:32PM +0200, peterz at

On 07.08.20 11:01, Marco Elver wrote: > On Thu, 6 Aug 2020 at 18:06, Marco Elver <elver at google.com> wrote: >> On Thu, 6 Aug 2020 at 15:17, Marco Elver <elver at google.com> wrote: >>> On Thu, Aug 06, 2020 at 01:32PM +0200, peterz at infradead.org wrote: >>>> On Thu, Aug 06, 2020 at 09:47:23AM +0200, Marco Elver wrote: >>>>> Testing my

On 11.08.20 09:00, Marco Elver wrote: > On Fri, 7 Aug 2020 at 17:19, Marco Elver <elver at google.com> wrote: >> On Fri, Aug 07, 2020 at 02:08PM +0200, Marco Elver wrote: >>> On Fri, 7 Aug 2020 at 14:04, J?rgen Gro? <jgross at suse.com> wrote: >>>> >>>> On 07.08.20 13:38, Marco Elver wrote: >>>>> On Fri, Aug 07, 2020 at 12:35PM

Hi everyone, This is the long-awaited version two of the patches I previously posted in November last year: https://lore.kernel.org/lkml/20191108170120.22331-1-will at kernel.org/ I ended up parking the series while the READ_ONCE() implementation was being overhauled, but with that merged during the recent merge window and LTO patches being posted again [1], it was time for a refresh. The

Hi everyone, This is the long-awaited version two of the patches I previously posted in November last year: https://lore.kernel.org/lkml/20191108170120.22331-1-will at kernel.org/ I ended up parking the series while the READ_ONCE() implementation was being overhauled, but with that merged during the recent merge window and LTO patches being posted again [1], it was time for a refresh. The

Hi, I''m obviously doing something stupid, but I''m trying to figure out how the Money library (http://dist.leetsoft.com/api/money/) is supposed to work. I have a Product model and I want to have an attribute in my model called "price" and I want it to accept Money objects. So I have this in my Product model. class Product < ActiveRecord::Base composed_of :price,

Hi, I am using file_column for some image uploading. I want to have all the images stored under one root which I have managed by setting the :store_dir option as below. file_column :filename, :store_dir => File.join(RAILS_ROOT, ''public'', ''images'', ''products'') So, my images get uploaded to: /public/images/products/<primary_key>

Hi all, I''m using acts_as_authenticated for the front end facing part of my site. I have a model called Customer. I now want to protect the admin sides of things. I am thinking of using Ezra''s acl plugin (http://opensvn.csie.org/ezra/rails/plugins/dev/acl_system2/README) for this. My only problem is that I don''t want the model for admin users to be called Customer,

Hi, I''m trying to handle money within an online store I''m building and I''m very stuck. I understand that using a float in the db is bad because of "rounding errors", and that storing the price as an integer is the best way forward. I know this has been brought up before on the list and I have search the archives but can''t find a good way forward.

Has anyone any experience of getting the Paypal plug in to work? I''ve set myself up on the Paypal sandbox, I''ve setup my sending and receiving accounts, i''ve got the Paypal button on my view, I can go and make payments ok, but I can''t get the Instant Payment Notification part to work. At the end of the payment process the user is left in a paypal screen

Hi all, I have created projects module in my application using scaffold, and it created me everything, and all the modules are working except the functional test. This is the error 1) Failure: test_create(ProjectsControllerTest) [test/functional/projects_controller_test.rb :55]: Expected response to be a <:redirect>, but was <200> 8 tests, 25 assertions, 1 failures, 0

On 06/15/2014 06:17 PM, Peter Zijlstra wrote: > Signed-off-by: Peter Zijlstra<peterz at infradead.org> > --- [...] > + > +void kvm_wait(int *ptr, int val) > +{ > + unsigned long flags; > + > + if (in_nmi()) > + return; > + > + /* > + * Make sure an interrupt handler can't upset things in a > + * partially setup state. > + */ I am seeing hang

On 06/15/2014 06:17 PM, Peter Zijlstra wrote: > Signed-off-by: Peter Zijlstra<peterz at infradead.org> > --- [...] > + > +void kvm_wait(int *ptr, int val) > +{ > + unsigned long flags; > + > + if (in_nmi()) > + return; > + > + /* > + * Make sure an interrupt handler can't upset things in a > + * partially setup state. > + */ I am seeing hang

On Fri, Aug 07, 2020 at 05:19:03PM +0200, Marco Elver wrote: > My hypothesis here is simply that kvm_wait() may be called in a place > where we get the same case I mentioned to Peter, > > raw_local_irq_save(); /* or other IRQs off without tracing */ > ... > kvm_wait() /* IRQ state tracing gets confused */ > ... > raw_local_irq_restore(); > > and therefore,

On Tue, Aug 11, 2020 at 09:57:55AM +0200, J?rgen Gro? wrote: > On 11.08.20 09:41, Peter Zijlstra wrote: > > On Fri, Aug 07, 2020 at 05:19:03PM +0200, Marco Elver wrote: > > > > > My hypothesis here is simply that kvm_wait() may be called in a place > > > where we get the same case I mentioned to Peter, > > > > > > raw_local_irq_save(); /* or

It was found when running fio sequential write test with a XFS ramdisk on a VM running on a 2-socket x86-64 system, the %CPU times as reported by perf were as follows: 69.75% 0.59% fio [k] down_write 69.15% 0.01% fio [k] call_rwsem_down_write_failed 67.12% 1.12% fio [k] rwsem_down_write_failed 63.48% 52.77% fio [k] osq_lock 9.46% 7.88% fio [k]