From: Frederic Weisbecker <frederic@kernel.org>
To: Valentin Schneider <vschneid@redhat.com>
Cc: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org,
linux-doc@vger.kernel.org, kvm@vger.kernel.org,
linux-mm@kvack.org, bpf@vger.kernel.org, x86@kernel.org,
"Nicolas Saenz Julienne" <nsaenzju@redhat.com>,
"Steven Rostedt" <rostedt@goodmis.org>,
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"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
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"Yang Jihong" <yangjihong1@huawei.com>,
"Petr Mladek" <pmladek@suse.com>,
"Jason A. Donenfeld" <Jason@zx2c4.com>,
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"Julian Pidancet" <julian.pidancet@oracle.com>,
"Tom Lendacky" <thomas.lendacky@amd.com>,
"Dionna Glaze" <dionnaglaze@google.com>,
"Thomas Weißschuh" <linux@weissschuh.net>,
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"Daniel Bristot de Oliveira" <bristot@redhat.com>,
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"Yair Podemsky" <ypodemsk@redhat.com>
Subject: Re: [RFC PATCH 11/14] context-tracking: Introduce work deferral infrastructure
Date: Thu, 6 Jul 2023 12:01:46 +0200 [thread overview]
Message-ID: <ZKaRCsWfYVPVMBcz@lothringen> (raw)
In-Reply-To: <ZKXtfWZiM66dK5xC@localhost.localdomain>
On Thu, Jul 06, 2023 at 12:23:57AM +0200, Frederic Weisbecker wrote:
> diff --git a/include/linux/context_tracking_state.h b/include/linux/context_tracking_state.h
> index fdd537ea513f..ec3d172601c5 100644
> --- a/include/linux/context_tracking_state.h
> +++ b/include/linux/context_tracking_state.h
> @@ -10,14 +10,19 @@
> #define DYNTICK_IRQ_NONIDLE ((LONG_MAX / 2) + 1)
>
> enum ctx_state {
> + /* Following are values */
> CONTEXT_DISABLED = -1, /* returned by ct_state() if unknown */
> CONTEXT_KERNEL = 0,
> CONTEXT_IDLE = 1,
> CONTEXT_USER = 2,
> - CONTEXT_GUEST = 3,
> - CONTEXT_MAX = 4,
> + /* Following are bit numbers */
> + CONTEXT_WORK = 2,
> + CONTEXT_MAX = 16,
> };
>
> +#define CONTEXT_MASK (BIT(CONTEXT_WORK) - 1)
> +#define CONTEXT_WORK_MASK ((BIT(CONTEXT_MAX) - 1) & ~(BIT(CONTEXT_WORK) - 1))
> +
> /* Even value for idle, else odd. */
> #define RCU_DYNTICKS_IDX CONTEXT_MAX
And that should be:
#define RCU_DYNTICKS_IDX BIT(CONTEXT_MAX)
Did I mention it's not even build tested? :o)
next prev parent reply other threads:[~2023-07-06 10:01 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-05 18:12 [RFC PATCH 00/14] context_tracking,x86: Defer some IPIs until a user->kernel transition Valentin Schneider
2023-07-05 18:12 ` [RFC PATCH 01/14] tracing/filters: Dynamically allocate filter_pred.regex Valentin Schneider
2023-07-05 18:12 ` [RFC PATCH 02/14] tracing/filters: Enable filtering a cpumask field by another cpumask Valentin Schneider
2023-07-05 18:54 ` Steven Rostedt
2023-07-05 18:12 ` [RFC PATCH 03/14] tracing/filters: Enable filtering a scalar field by a cpumask Valentin Schneider
2023-07-05 19:00 ` Steven Rostedt
2023-07-05 18:12 ` [RFC PATCH 04/14] tracing/filters: Enable filtering the CPU common " Valentin Schneider
2023-07-05 18:12 ` [RFC PATCH 05/14] tracing/filters: Document cpumask filtering Valentin Schneider
2023-07-05 18:12 ` [RFC PATCH 06/14] objtool: Flesh out warning related to pv_ops[] calls Valentin Schneider
2023-07-05 18:12 ` [RFC PATCH 07/14] objtool: Warn about non __ro_after_init static key usage in .noinstr Valentin Schneider
2023-07-05 18:12 ` [RFC PATCH 08/14] BROKEN: context_tracking: Make context_tracking_key __ro_after_init Valentin Schneider
2023-07-05 20:41 ` Peter Zijlstra
2023-07-05 18:12 ` [RFC PATCH 09/14] x86/kvm: Make kvm_async_pf_enabled __ro_after_init Valentin Schneider
2023-07-05 18:12 ` [RFC PATCH 10/14] x86/sev-es: Make sev_es_enable_key __ro_after_init Valentin Schneider
2023-07-05 18:12 ` [RFC PATCH 11/14] context-tracking: Introduce work deferral infrastructure Valentin Schneider
2023-07-05 22:23 ` Frederic Weisbecker
2023-07-05 22:41 ` Peter Zijlstra
2023-07-06 9:53 ` Frederic Weisbecker
2023-07-06 10:01 ` Frederic Weisbecker [this message]
2023-07-06 11:30 ` Valentin Schneider
2023-07-06 11:40 ` Frederic Weisbecker
2023-07-06 16:39 ` Paul E. McKenney
2023-07-06 18:05 ` Valentin Schneider
2023-07-06 11:55 ` Frederic Weisbecker
2023-07-05 22:39 ` Peter Zijlstra
2023-07-06 11:31 ` Valentin Schneider
2023-07-05 18:12 ` [RFC PATCH 12/14] context_tracking,x86: Defer kernel text patching IPIs Valentin Schneider
2023-07-05 18:12 ` [RFC PATCH 13/14] context_tracking,x86: Add infrastructure to defer kernel TLBI Valentin Schneider
2023-07-05 18:12 ` [RFC PATCH 14/14] x86/mm, mm/vmalloc: Defer flush_tlb_kernel_range() targeting NOHZ_FULL CPUs Valentin Schneider
2023-07-05 18:48 ` [RFC PATCH 00/14] context_tracking,x86: Defer some IPIs until a user->kernel transition Nadav Amit
2023-07-06 11:29 ` Valentin Schneider
2023-07-05 19:03 ` Steven Rostedt
2023-07-06 11:30 ` Valentin Schneider
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