From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1CAACC433ED for ; Wed, 12 May 2021 13:18:59 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id BBE296112D for ; Wed, 12 May 2021 13:18:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BBE296112D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:Cc:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=844rym5F42f+3NJ8EyC5zAU6wuBpgqFtMvliuLKPJNY=; b=IJiWtEm8zA2wKtoMRA1FgKiI9 U+M8XMrKf/6YKXyQlv+epZXlRRxVyONWNMM1GCtDM5Kxso4gaajxBN5vL8Mz61sIi2fo1Ry8kSIEo czvyrrr55ynf5vu1/JG7v/MsljsjtxsCkosx50CJM6t0h+eQB4ND05DVfQxXm3Uva9in7LcX+tF/y VOiyTFpxEiCBgqQACSQRMpUjff/fKllMXzr7E1aH06EBFvLr2nApXskrpg1YJgcVbNmFGCMLx8sDr JJUbt4RX/ygDzm2be7VkB5I9U54djWAzc6P3OXiBbxXXcaSO2JUUxUgikcDlpb155tlpLoqNURNoT W+p7Ea14A==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lgolJ-002s9m-W0; Wed, 12 May 2021 13:18:54 +0000 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lgoim-002rdT-MJ for linux-nvme@desiato.infradead.org; Wed, 12 May 2021 13:16:16 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=bco/Dc5NOlfO0gbeRuz1xmWQ5rDoBprwVddNApuJIrQ=; b=ZG/Y11TRYlBgwmkgGZJrWZ8dz5 MdaGSEALUsAf7HHtOFkBuBcVeFoW3Wu7awQKILH4cOXDt1She7nubo/0wUXWtOqn//6Tx6Nu2GtPr Xpf+KtZvX0gUuVrfNDYTzqPyYgWr8OaUxqJI+P3VunqVfvRBVGq1JA/zmIMvGD/3Yu1JsLrFZrjat DW/DOKkKCp9OUzfAoUfzxdPBc8CT2G0WymUYIExxrBu6onr0FFy22Tgw6oC+PlTR+PesxzKy8ZSH5 GZhGFnvs9jVNCXIHIXE/okvDEz9CLUN/GEUcFe8+4TPao778oQZCbl2PitW1Z+kf+9JwcY9IcBXDf 3DtpqJsQ==; Received: from [2001:4bb8:198:fbc8:1036:7ab9:f97a:adbc] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94 #2 (Red Hat Linux)) id 1lgoik-00AO4b-RS; Wed, 12 May 2021 13:16:15 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Jeffle Xu , Ming Lei , Damien Le Moal , Keith Busch , Sagi Grimberg , "Wunderlich, Mark" , "Vasudevan, Anil" , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-nvme@lists.infradead.org Subject: [PATCH 10/15] block: use SLAB_TYPESAFE_BY_RCU for the bio slab Date: Wed, 12 May 2021 15:15:40 +0200 Message-Id: <20210512131545.495160-11-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210512131545.495160-1-hch@lst.de> References: <20210512131545.495160-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org This flags ensures that the pages will not be reused for non-bio allocations before the end of an RCU grace period. With that we can safely use a RCU lookup for bio polling as long as we are fine with occasionally polling the wrong device. Signed-off-by: Christoph Hellwig --- block/bio.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/block/bio.c b/block/bio.c index 44205dfb6b60..de5505d7018e 100644 --- a/block/bio.c +++ b/block/bio.c @@ -82,7 +82,8 @@ static struct bio_slab *create_bio_slab(unsigned int size) snprintf(bslab->name, sizeof(bslab->name), "bio-%d", size); bslab->slab = kmem_cache_create(bslab->name, size, - ARCH_KMALLOC_MINALIGN, SLAB_HWCACHE_ALIGN, NULL); + ARCH_KMALLOC_MINALIGN, + SLAB_HWCACHE_ALIGN | SLAB_TYPESAFE_BY_RCU, NULL); if (!bslab->slab) goto fail_alloc_slab; -- 2.30.2 _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme