From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 2CBB6327C13 for ; Mon, 5 Jan 2026 08:23:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767601412; cv=none; b=KtFbbrMLKdxK+H3BYT6F/6hL6bkgDm5xeDqQHs8Qpd841bafFHj7lL2M8jpmP+ECs4uYvtdjKQpO2upJSpoa2O0RyEVk5ZzdXUeB+nX3/MEoTPkW0xLRo/ZvZWSYye87nYoNoozf1+CTSXbGW3JH4q/guaFEoSob6hlwA49nFBY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767601412; c=relaxed/simple; bh=m98JsLLlZnpLuynLg3Syt9uCZ7QvI0/Lv10M2IDOLnc=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=rsH+KlkH1aMrF2MTJcoId8Mfc+53xzhde2j/xEYtv9c1JFGBKcW5/ZRmHxYg2FDINY8/EKB5vhF4mx57sRqLCOnVVp+P/Sf3Zge6/XpzwW+INoO68YusCLKNE5h7O4uLFfLkpktDNEHmtt+vasnEUHu0KSbzKhoVgLIqAvtQxF0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=cYx6RUs6; dkim=pass (2048-bit key) header.d=redhat.com header.i=@redhat.com header.b=HNFt2K4n; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="cYx6RUs6"; dkim=pass (2048-bit key) header.d=redhat.com header.i=@redhat.com header.b="HNFt2K4n" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1767601408; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=I9g6na9OJuiciu3rQw6J7JsbFxwpCGTH1jubl50jggg=; b=cYx6RUs6goTCeNY6aVjYx4YQS+ptNWYGgTbCMRXb5PRiY2lkA1apxrYhN0AxiumV7LBBBx FmJcuAkjj68Rrek1YWBGWyn+h/uK9jApFFWVtLwi6OLNalnuM3UW6EYKXmtWaCokZXoNDf Di1SYtL7U0HIk1/BBsvLv38zbHZtl+I= Received: from mail-wm1-f71.google.com (mail-wm1-f71.google.com [209.85.128.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-50-F2YxBDKVNriHZZNrsY8hKg-1; Mon, 05 Jan 2026 03:23:27 -0500 X-MC-Unique: F2YxBDKVNriHZZNrsY8hKg-1 X-Mimecast-MFC-AGG-ID: F2YxBDKVNriHZZNrsY8hKg_1767601406 Received: by mail-wm1-f71.google.com with SMTP id 5b1f17b1804b1-4776079ada3so122521315e9.1 for ; Mon, 05 Jan 2026 00:23:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=google; t=1767601406; x=1768206206; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=I9g6na9OJuiciu3rQw6J7JsbFxwpCGTH1jubl50jggg=; b=HNFt2K4nrKwtmV5zxL9p1IDWtYF6/CRC55HJdhLX6m3fggaCCbMmekZDKVQeGoSITW RZZgbEGUcgdzte4iaGro3BeuE0f77uJN9NyA8u5GtVYMabjpU+1BX3VFPthMgKY5WqaA lgIg880J3bPrGGeXDaTu7uxcjT55B6xlWG0BgjSQuQiHROeKazcumFp1r1J1O5O8K7sF 0jOXhX4tytfpcSJjWoSK1vKehMyplHa4NJ4RsoPN2fhXS8AiOehW+KOCcZkBVWeQ3iMb 86CMUlvBfaedLWcxKcEEUvjEb5CgXx9M95W6GgTz50qJ8vaUwJXnr6cM4sHTdH2HFzbl 3pow== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1767601406; x=1768206206; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-gg:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=I9g6na9OJuiciu3rQw6J7JsbFxwpCGTH1jubl50jggg=; b=PPAUmE0xs2p8MrOxTmOLLJ896PgVmV8tOUHZ7wrhaiITq+sXrpYPvVyRo0Hf7f/zHq wiTvwe4Vmn9/Zsz0HsnkJVl4UY40hx9GE0doM15JsfQr1dS+DQVdwGRczeRLVLk+exRz iCT50ZDeR4ggG35Azz0Aj4tlS7XCELAP0V4mUrzmfULM1SDl8JQsj+JvikZC0onCZTpP hirPOuFbkDFSObV/0XPrXgLwueSOKaeLiE/qi1xXOCAYCaLjPpEG7Jocc5cewTezd8iM g9MF6xY8VyKF65LsyXq9/KVFSJ7rw+x4sw1uOwfWsF7BQi3ky3fUxDx/DXvgMR6DLxbM JHRQ== X-Forwarded-Encrypted: i=1; AJvYcCURxJPl4rw68qsvtlnmvfGOiQpuptGZAkxd8/nPQWoChrSCB/Ou4VFDLvk56yBiX9gg+BFSVr1EUwgezGI=@vger.kernel.org X-Gm-Message-State: AOJu0YyeX2lziBu7jzq+hzN1632jGThDGLOWEDMxIxcr0xihiNvk3Pk1 3oYTAtYHwGFehGB/+CeUKNoIbuk74A7WFd/yHC+3tZLf+Q/N0bGMQTUNjC2sZnX1kQ6reUWUD7C B5vHtfwd1h+AUpTUiX3lVlFOYQvqrR2zSlur2f1dxqy7kpwUi2b5AHe/dBQuqVVxBkg== X-Gm-Gg: AY/fxX7ToUEQdWz1BqS4mp9hLduBLeXHTmprWSU4U2qwi99oyNSS8ODWDucEwzjGyd8 fr3yKPTJPf8hvImZ+msUQRC6H6wlX86mSm58avq7FLQKOCryO2NJBC1hpG0GvOPa8faVpEAadF4 ZkxjunTWN/tDlfxINqjyczr+1+TEEgjq3rpELC0Dz0mMWq7HkhNShm3gHAefiDW2rXXW48xWH4d 2wsFv9WmWRO5LUqv77fc23THUtNdjhNDL7Sgu4t+mma779TxTk/tn2nCTZGGESpUw+A0z80qbSk W/lzj19fMuiaVFU7axHHqtJpxsb1u+nXgePitJEFb0xMgXNcKlr0IQYAQabOsygvKXfQekOzz0A /ijJvr6Xys+tGRVKktlRWsU8Cpqvu2PvILQ== X-Received: by 2002:a05:600c:4446:b0:475:e007:bae0 with SMTP id 5b1f17b1804b1-47d1956f896mr633168595e9.16.1767601405664; Mon, 05 Jan 2026 00:23:25 -0800 (PST) X-Google-Smtp-Source: AGHT+IGv7DIcbBq1VkvqQ23EJm44n2GxyGgRTRuTvRGBj8avn63Zc8/z+R9wImAFB24DC8Gpann5cw== X-Received: by 2002:a05:600c:4446:b0:475:e007:bae0 with SMTP id 5b1f17b1804b1-47d1956f896mr633168065e9.16.1767601405201; Mon, 05 Jan 2026 00:23:25 -0800 (PST) Received: from redhat.com (IGLD-80-230-31-118.inter.net.il. [80.230.31.118]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-47d6c08f56dsm51171265e9.9.2026.01.05.00.23.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Jan 2026 00:23:24 -0800 (PST) Date: Mon, 5 Jan 2026 03:23:21 -0500 From: "Michael S. Tsirkin" To: linux-kernel@vger.kernel.org Cc: Cong Wang , Jonathan Corbet , Olivia Mackall , Herbert Xu , Jason Wang , Paolo Bonzini , Stefan Hajnoczi , Eugenio =?utf-8?B?UMOpcmV6?= , "James E.J. Bottomley" , "Martin K. Petersen" , Gerd Hoffmann , Xuan Zhuo , Marek Szyprowski , Robin Murphy , Stefano Garzarella , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Petr Tesarik , Leon Romanovsky , Jason Gunthorpe , Bartosz Golaszewski , linux-doc@vger.kernel.org, linux-crypto@vger.kernel.org, virtualization@lists.linux.dev, linux-scsi@vger.kernel.org, iommu@lists.linux.dev, kvm@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH v2 08/15] vsock/virtio: use virtqueue_add_inbuf_cache_clean for events Message-ID: <4b5bf63a7ebb782d87f643466b3669df567c9fe1.1767601130.git.mst@redhat.com> References: Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Mailer: git-send-email 2.27.0.106.g8ac3dc51b1 X-Mutt-Fcc: =sent The event_list array contains 8 small (4-byte) events that share cachelines with each other. When CONFIG_DMA_API_DEBUG is enabled, this can trigger warnings about overlapping DMA mappings within the same cacheline. The previous patch isolated event_list in its own cache lines so the warnings are spurious. Use virtqueue_add_inbuf_cache_clean() to indicate that the CPU does not write into these fields, suppressing the warnings. Reported-by: Cong Wang Signed-off-by: Michael S. Tsirkin --- net/vmw_vsock/virtio_transport.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c index bb94baadfd8b..ef983c36cb66 100644 --- a/net/vmw_vsock/virtio_transport.c +++ b/net/vmw_vsock/virtio_transport.c @@ -392,7 +392,7 @@ static int virtio_vsock_event_fill_one(struct virtio_vsock *vsock, sg_init_one(&sg, event, sizeof(*event)); - return virtqueue_add_inbuf(vq, &sg, 1, event, GFP_KERNEL); + return virtqueue_add_inbuf_cache_clean(vq, &sg, 1, event, GFP_KERNEL); } /* event_lock must be held */ -- MST