From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 476E6DDC3 for ; Tue, 9 Sep 2025 22:20:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757456418; cv=none; b=nmv6vCLRrBux1uueX7wDHiptBD+FNugS1TZ/dcn9MA4Nr2n7dORmORCmFgTydUDcCTyUibE7VNjQJaqPFTM4xBocHP1LQDFb3b6O3e1AqjLlWlroWKSEHaifoc4HRLjluLFPFo56vx3mc9B/ushXKUsuM5Tnp8HS71gRWE9lK1Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757456418; c=relaxed/simple; bh=k543HBY3iPS5FEJ45yq8cqoQji/9GFCbQc+MS9+u1M8=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=hZsHGgzrbHHRWascdig5nkmz3+rcC7aigBi5F8BjQQgv4Bt/IkjIDuc3Wy0a3pB3CqYWcRbYTuDvjPZYKOCkLyA1R3LN3MkJmPJR9theEu0JhXMgCQIjmUBrb4qtUJo4Q+xlwfKW0L96p75Dv3Cxk1pfSfRJD1wbbhWh7oZuMU0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=B7YHPDUX; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="B7YHPDUX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D0DF7C4CEF4; Tue, 9 Sep 2025 22:20:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1757456416; bh=k543HBY3iPS5FEJ45yq8cqoQji/9GFCbQc+MS9+u1M8=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=B7YHPDUXh3EDGedKESwNylPzeSxBpTrOTW0d6hEhr7//kE4Cg6n+QbtirCHThhI+y 3J5fYLeWw8awLrTMtjPPWOGzEz4mEW5Clz17cCNGmCYv3/H3JcyBF52c35qE73P0nN /k88qvBxcYbhbJvbC75zp7M5dO0LcVdna6oO+D20SuE5jxUqaQ/vjttHOMPy2NcC9h ixmOQE1QKke48KCsFrkiheFg8YQa5CqYnxyO1eOO288rrHhFE1MSkSuxzayxp9IikT ZYjF3KDLCeVskVDC/4YF7WbvVbluLePub78uHDLRqqnb88u269tlDmZL2q7r+HiYTQ D4L9iY+sYrj7w== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 34344383BF69; Tue, 9 Sep 2025 22:20:21 +0000 (UTC) Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH bpf v2] rqspinlock: Choose trylock fallback for NMI waiters From: patchwork-bot+netdevbpf@kernel.org Message-Id: <175745641999.833608.430490724192273857.git-patchwork-notify@kernel.org> Date: Tue, 09 Sep 2025 22:20:19 +0000 References: <20250909184959.3509085-1-memxor@gmail.com> In-Reply-To: <20250909184959.3509085-1-memxor@gmail.com> To: Kumar Kartikeya Dwivedi Cc: bpf@vger.kernel.org, josef@toxicpanda.com, ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net, martin.lau@kernel.org, eddyz87@gmail.com, kkd@meta.com, kernel-team@meta.com Hello: This patch was applied to bpf/bpf.git (master) by Alexei Starovoitov : On Tue, 9 Sep 2025 18:49:59 +0000 you wrote: > Currently, out of all 3 types of waiters in the rqspinlock slow path > (i.e., pending bit waiter, wait queue head waiter, and wait queue > non-head waiter), only the pending bit waiter and wait queue head > waiters apply deadlock checks and a timeout on their waiting loop. The > assumption here was that the wait queue head's forward progress would be > sufficient to identify cases where the lock owner or pending bit waiter > is stuck, and non-head waiters relying on the head waiter would prove to > be sufficient for their own forward progress. > > [...] Here is the summary with links: - [bpf,v2] rqspinlock: Choose trylock fallback for NMI waiters https://git.kernel.org/bpf/bpf/c/0d80e7f951be You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html