From: Peter Zijlstra <peterz@infradead.org>
To: tglx@linutronix.de, axboe@kernel.dk
Cc: linux-kernel@vger.kernel.org, mingo@redhat.com,
dvhart@infradead.org, dave@stgolabs.net, andrealmeid@igalia.com,
Andrew Morton <akpm@linux-foundation.org>,
urezki@gmail.com, hch@infradead.org, lstoakes@gmail.com,
Arnd Bergmann <arnd@arndb.de>,
linux-api@vger.kernel.org, linux-mm@kvack.org,
linux-arch@vger.kernel.org, malteskarupke@web.de
Subject: Re: [RFC][PATCH 07/10] futex: Implement FUTEX2_NUMA
Date: Fri, 14 Jul 2023 17:22:22 +0200 [thread overview]
Message-ID: <20230714152222.GD3261758@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20230714141219.081639007@infradead.org>
On Fri, Jul 14, 2023 at 03:39:06PM +0200, Peter Zijlstra wrote:
> + /*
> + * Encode the futex size in the offset. This makes cross-size
> + * wake-wait fail -- see futex_match().
> + *
> + * NOTE that cross-size wake-wait is fundamentally broken wrt
> + * FLAGS_NUMA but could possibly work for !NUMA.
> + */
> + key->both.offset |= FUT_OFF_SIZE * (flags & FLAGS_SIZE_MASK);
this wee bit should've gone in patch 9.
next prev parent reply other threads:[~2023-07-14 15:22 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-14 13:38 [RFC][PATCH 00/10] futex: More Futex2 bits Peter Zijlstra
2023-07-14 13:39 ` [RFC][PATCH 01/10] futex: Clarify FUTEX2 flags Peter Zijlstra
2023-07-14 13:39 ` [RFC][PATCH 02/10] futex: Extend the " Peter Zijlstra
2023-07-14 13:39 ` [RFC][PATCH 03/10] futex: Flag conversion Peter Zijlstra
2023-07-14 13:39 ` [RFC][PATCH 04/10] futex: Add sys_futex_wake() Peter Zijlstra
2023-07-14 14:26 ` Arnd Bergmann
2023-07-14 14:47 ` Peter Zijlstra
2023-07-14 20:10 ` Arnd Bergmann
2023-07-14 13:39 ` [RFC][PATCH 05/10] mm: Add vmalloc_huge_node() Peter Zijlstra
2023-07-14 14:37 ` Matthew Wilcox
2023-07-14 15:09 ` Peter Zijlstra
2023-07-14 15:11 ` Matthew Wilcox
2023-07-14 15:26 ` Peter Zijlstra
2023-07-14 13:39 ` [RFC][PATCH 06/10] futex: Propagate flags into get_futex_key() Peter Zijlstra
2023-07-14 13:39 ` [RFC][PATCH 07/10] futex: Implement FUTEX2_NUMA Peter Zijlstra
2023-07-14 15:22 ` Peter Zijlstra [this message]
2023-07-14 13:39 ` [RFC][PATCH 08/10] futex: Propagate flags into futex_get_value_locked() Peter Zijlstra
2023-07-14 13:39 ` [RFC][PATCH 09/10] futex: Enable FUTEX2_{8,16} Peter Zijlstra
2023-07-14 13:39 ` [HACK][PATCH 10/10] futex: Munge size and numa into the legacy interface Peter Zijlstra
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