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 E7465436376; Wed, 27 May 2026 15:33:23 +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=1779896004; cv=none; b=B4dUuwKpouLXF+MR9UHm/ParyeScgnzWEp5vxRwa0OakoO6t0CxfUsxx+wckYR1zzv1abtOsqSmWABiQ4pAXrYKBBGFWziZ/WSqwDvTEAoLVVkW1UmDYJKAejiUDc0jPcUs2RMGOCdZM1QWypUkatC9drJ6KQvgPg/soI5xGtZc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779896004; c=relaxed/simple; bh=Fy7SviBXyfR5Bkm0PCeZ4kofves6M/GmlsfFUICPdbk=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=XVFMP+SFfd6MWbnqnfgkOiA5qedWbj+vO6e60BNkn+gNFjl2XDxObErmCJZDjDjaSRF2MkHWc7pBQH/8CuVbcDbdIAGVr9/xZ6QSpOxC0+pyonYjtQ95xcDG30snGyRxgFNw8Mcq3eyGrZ0VWE16CEfKrTKbBe5vVvibjDIW348= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Zsanj2tq; 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="Zsanj2tq" Received: by smtp.kernel.org (Postfix) with ESMTPS id 8E8DCC2BCF7; Wed, 27 May 2026 15:33:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1779896002; bh=Fy7SviBXyfR5Bkm0PCeZ4kofves6M/GmlsfFUICPdbk=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=Zsanj2tqyi0TtgslAqA7S3Uu361R8oEGT24pGgf4cov0NxluFq6sxzsaFDngAbGNN Zwg41zTkvnfxV//sndSvH7qpnG2G1cFT9lca1WGhcWkPRtWTmTtJtYZywShxYWauEm XCFnRLnYrUYgOb/JeAKNO5MqeXu8x666GWAxPuFjx+hxgSZL3FjzKbsVLPe2LFmOMe hIVr82GfiZrQJmxHIJuZP3oOsk6DC8fFKaTq+LNoc3dqzYrKLRCYLfWn8pF0LgPye2 ZmYii46Bki8fZ4LClgbYLSuaG0uY0cT1h/G5nD/xHaoD+P/B72nse40Gv5AQ/v9Cvg QQFhv1HkqgrVA== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 861D7CD4F54; Wed, 27 May 2026 15:33:22 +0000 (UTC) From: Ackerley Tng via B4 Relay Date: Wed, 27 May 2026 08:33:15 -0700 Subject: [PATCH RFC 03/12] Documentation: KVM: Consolidate notes about kvm->slots_lock and irq_lock Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260527-kvm-locking-docs-v1-3-4fe8b602ff47@google.com> References: <20260527-kvm-locking-docs-v1-0-4fe8b602ff47@google.com> In-Reply-To: <20260527-kvm-locking-docs-v1-0-4fe8b602ff47@google.com> To: Paolo Bonzini , Jonathan Corbet , Shuah Khan , Tianrui Zhao , Bibo Mao , Huacai Chen , WANG Xuerui , Sean Christopherson , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , Fuad Tabba , vannapurve@google.com, x86@kernel.org, "H. Peter Anvin" Cc: kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, Ackerley Tng X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1779896001; l=1205; i=ackerleytng@google.com; s=20260225; h=from:subject:message-id; bh=5xqYuflg/lHRaHVhIbofzsJqCQI4L326JDxGJuO8b0U=; b=/bIlnjfndGdNS+ll2dxYYvqLLoNppW84HDwXhvbpWFF04ZPlHUMWp75WsSLCcKYSYWt61B5P7 mXli/FQOdC4BvZ0ynYtyfQjBM8Q6lsysXNUKDjZXn5ui6jUMED+c4jb X-Developer-Key: i=ackerleytng@google.com; a=ed25519; pk=sAZDYXdm6Iz8FHitpHeFlCMXwabodTm7p8/3/8xUxuU= X-Endpoint-Received: by B4 Relay for ackerleytng@google.com/20260225 with auth_id=649 X-Original-From: Ackerley Tng Reply-To: ackerleytng@google.com From: Ackerley Tng Move the detail about ordering between kvm->slots_lock and kvm->irq_lock to where the two locks are first mentioned. Signed-off-by: Ackerley Tng --- Documentation/virt/kvm/locking.rst | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/Documentation/virt/kvm/locking.rst b/Documentation/virt/kvm/locking.rst index 1e8cbbe3ba706..67dd2066f6d98 100644 --- a/Documentation/virt/kvm/locking.rst +++ b/Documentation/virt/kvm/locking.rst @@ -21,12 +21,11 @@ The acquisition orders for mutexes are as follows: - kvm->lock is taken outside vcpu->mutex - kvm->lock is taken outside kvm->slots_lock and kvm->irq_lock + - kvm->slots_lock is taken outside kvm->irq_lock, though acquiring + them together is quite rare. - vcpu->mutex is taken outside kvm->slots_lock and kvm->slots_arch_lock -- kvm->slots_lock is taken outside kvm->irq_lock, though acquiring - them together is quite rare. - - kvm->mn_active_invalidate_count ensures that pairs of invalidate_range_start() and invalidate_range_end() callbacks use the same memslots array. kvm->slots_lock and kvm->slots_arch_lock -- 2.54.0.823.g6e5bcc1fc9-goog