Messages in this thread | | | Date | Fri, 5 Apr 2024 17:37:59 +0200 | Subject | Re: [PATCH v6 00/37] Memory allocation profiling | From | Klara Modin <> |
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On 2024-04-05 17:20, Suren Baghdasaryan wrote: > On Fri, Apr 5, 2024 at 7:30 AM Klara Modin <klarasmodin@gmail.com> wrote: >> >> On 2024-04-05 16:14, Suren Baghdasaryan wrote: >>> On Fri, Apr 5, 2024 at 6:37 AM Klara Modin <klarasmodin@gmail.com> wrote: >>>> If I enable this, I consistently get percpu allocation failures. I can >>>> occasionally reproduce it in qemu. I've attached the logs and my config, >>>> please let me know if there's anything else that could be relevant. >>> >>> Thanks for the report! >>> In debug_alloc_profiling.log I see: >>> >>> [ 7.445127] percpu: limit reached, disable warning >>> >>> That's probably the reason. I'll take a closer look at the cause of >>> that and how we can fix it. >> >> Thanks! > > In the build that produced debug_alloc_profiling.log I think we are > consuming all the per-cpu memory reserved for the modules. Could you > please try this change and see if that fixes the issue: > > include/linux/percpu.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/include/linux/percpu.h b/include/linux/percpu.h > index a790afba9386..03053de557cf 100644 > --- a/include/linux/percpu.h > +++ b/include/linux/percpu.h > @@ -17,7 +17,7 @@ > /* enough to cover all DEFINE_PER_CPUs in modules */ > #ifdef CONFIG_MODULES > #ifdef CONFIG_MEM_ALLOC_PROFILING > -#define PERCPU_MODULE_RESERVE (8 << 12) > +#define PERCPU_MODULE_RESERVE (8 << 13) > #else > #define PERCPU_MODULE_RESERVE (8 << 10) > #endif >
Yeah, that patch fixes the issue for me.
Thanks, Tested-by: Klara Modin
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