From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 F155449426C for ; Thu, 6 Aug 2026 23:40:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786059648; cv=none; b=swXEjm6NLCHYvsx6wWCiDOmBsVJrgM6YMMSn4s55Gy2DXboJrGq1C+QJnTHYSIfw+lkQOz1WoxSsgRcUBcBCfZ/H7T+1W8WAyyBGRUKA1JYbqEF06GH+bpjClrZACYMeUEKG2fUnqxarg3KUuzRRp1OxaqrbNvacoU/U0LuOL/o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786059648; c=relaxed/simple; bh=M/7OLACXAtDverq6ev0slogK8Oy7kUDqfUjAEh8TaxA=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=sS9yz+23Lau01wrsnkvITOIFsW4+rpO1E01duw3uklytk2SymVLqMZBFTqAl1o2Pmf5DsOMnnZ2Gt+e0gGv1TNl0tGC/RXyUeuYpZNlr4n+awAUAAAWkuFNyG8Gxrszr3HY6OTbBSOlAjphv6rVvbN5YXdw05W6Vl45+xqsiGJI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZX7UXjQh; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ZX7UXjQh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 831CD1F000E9; Thu, 6 Aug 2026 23:40:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1786059646; bh=w1FTTWO5fKIHI+Zg/S1CSKVerUSbLGwp1JE3OWObZVw=; h=Subject:From:Date:References:In-Reply-To:To:Cc; b=ZX7UXjQhA1ps1oCbKA6r+6KKnhlgcL5jvhnqxQDlipAjvc2Uqazuf0thQw1dqCSNJ gPcnuJDjqIFsIt2+6Cwn0YogkoI8KZbIR8VmRMhECD1eFeFUyzDGDjryCpotcluAs2 S/69MojrYW4syI18l1z6vS1EgsNoZdpjDsIDlOyg88oybLnv1vqpaZPZHTkHmmUKWt kqMNw4lVGkapdOs4r46wNSBNb+FuVKZkHvW4OttMgPQQ8hQKDdNUXBicUUOUpSyGis g+28BKiGvEbDoldhq9IDnmAWu+AyE067P7YlcXfR3jwJ+m1dqq6+dazobRXOnBFVRb RTvC9UmNug7ag== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id D0A2C380A950; Thu, 6 Aug 2026 23:40:06 +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 v1] rqspinlock: Reset tail when preserving queue on deadlock From: patchwork-bot+netdevbpf@kernel.org Message-Id: <178605960540.1528751.4736380552781847630.git-patchwork-notify@kernel.org> Date: Thu, 06 Aug 2026 23:40:05 +0000 References: <20260802021759.1139457-1-memxor@gmail.com> In-Reply-To: <20260802021759.1139457-1-memxor@gmail.com> To: Kumar Kartikeya Dwivedi Cc: bpf@vger.kernel.org, ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net, eddyz87@gmail.com, emil@etsalapatis.com, kkd@meta.com, kernel-team@meta.com Hello: This patch was applied to bpf/bpf.git (master) by Eduard Zingerman : On Sun, 2 Aug 2026 04:17:59 +0200 you wrote: > Currently, the destruction of the waiter queue is suppressed for > rqspinlock in cases where a deadlock is detected. Deadlock checks happen > relatively frequently (on entry for AA, within 1ms for ABBA), and waiter > threads may not be involved in locking scenarios involving deadlocks. > Thus, it is useful to not flush the queue and let other waiters take a > stab at acquiring the lock after we detect a deadlock and exit. > > [...] Here is the summary with links: - [bpf,v1] rqspinlock: Reset tail when preserving queue on deadlock https://git.kernel.org/bpf/bpf/c/7a3c0289c3c8 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html