From patchwork Thu Mar 28 16:33:59 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 13608964 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 1BB8F3C47C for ; Thu, 28 Mar 2024 16:36:38 +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=1711643799; cv=none; b=iLcJLWJWIJ9M8Tu3+OVjYXXGUI9AOn5u2trvfGeBa7Lp7EyRdf/6pJ0ZISNOsscEq3tzJa9OC3MobXi9IE0ahdVSCskHvQ4ikQQU89eBcfKZNQ4C/D+/SyJABZaAcmmL7Q34Hc61BljWLfKvUspgUYSemG745MGcoxTSkL/CKSs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711643799; c=relaxed/simple; bh=Qu6JNa/GWcyY0KPB2dwXn7WgECfZDHDGW9+owd8pc8k=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Ith5K/P//k/DLdSb3a9B3ymz9h4pJNXi2QFzRZmvn25Cgj6aYC2Y4NElS6g6YUBarawWqSCfZt4eHQqmzysJa4xf7HGqKpDbcEC26hOd33ZwPiifybRL6AxKlXxzWo3YnD3KrB34QPliQEnvUfxm4ri2fr9xc1FFdIKlLlCDLcY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none 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=LaFS9qkO; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none 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="LaFS9qkO" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1711643797; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=DTOCRVKlSMdVpJyaVTQSUOcv3/giUpppfoW0qaRDdtA=; b=LaFS9qkOTIm50bTOMFhZM9dRWSwWarYCh0tErAKRyF1Vod7vkBQL4BQ0OVdMuCZNlYysFG L01mKKFJW9qQza6vbYCreiI7RQ0ITz6fLqUgldL7Kt0zs4cl1mUykLQi8nTuS1MtvcFPWd zpQxbV0lL3uwFPJ3OpF2tGDfFvD5Apc= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-426-PKKJzPiePVmnP10543grxg-1; Thu, 28 Mar 2024 12:36:30 -0400 X-MC-Unique: PKKJzPiePVmnP10543grxg-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 88B663CBDF73; Thu, 28 Mar 2024 16:36:27 +0000 (UTC) Received: from warthog.procyon.org.com (unknown [10.42.28.146]) by smtp.corp.redhat.com (Postfix) with ESMTP id 95C5137F2; Thu, 28 Mar 2024 16:36:24 +0000 (UTC) From: David Howells To: Christian Brauner , Jeff Layton , Gao Xiang , Dominique Martinet Cc: David Howells , Matthew Wilcox , Steve French , Marc Dionne , Paulo Alcantara , Shyam Prasad N , Tom Talpey , Eric Van Hensbergen , Ilya Dryomov , netfs@lists.linux.dev, linux-cachefs@redhat.com, linux-afs@lists.infradead.org, linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, v9fs@lists.linux.dev, linux-erofs@lists.ozlabs.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 07/26] netfs: Make netfs_io_request::subreq_counter an atomic_t Date: Thu, 28 Mar 2024 16:33:59 +0000 Message-ID: <20240328163424.2781320-8-dhowells@redhat.com> In-Reply-To: <20240328163424.2781320-1-dhowells@redhat.com> References: <20240328163424.2781320-1-dhowells@redhat.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.1 Make the netfs_io_request::subreq_counter, used to generate values for netfs_io_subrequest::debug_index, into an atomic_t so that it can be called from the retry thread at the same time as the app thread issuing writes. Signed-off-by: David Howells cc: Jeff Layton cc: netfs@lists.linux.dev cc: linux-fsdevel@vger.kernel.org --- fs/netfs/output.c | 2 +- include/linux/netfs.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/netfs/output.c b/fs/netfs/output.c index 625eb68f3e5a..fbdbb4f78234 100644 --- a/fs/netfs/output.c +++ b/fs/netfs/output.c @@ -37,7 +37,7 @@ struct netfs_io_subrequest *netfs_create_write_request(struct netfs_io_request * subreq->source = dest; subreq->start = start; subreq->len = len; - subreq->debug_index = wreq->subreq_counter++; + subreq->debug_index = atomic_inc_return(&wreq->subreq_counter); switch (subreq->source) { case NETFS_UPLOAD_TO_SERVER: diff --git a/include/linux/netfs.h b/include/linux/netfs.h index f36a6d8163d1..ddafc6ebff42 100644 --- a/include/linux/netfs.h +++ b/include/linux/netfs.h @@ -202,7 +202,7 @@ struct netfs_io_request { unsigned int debug_id; unsigned int rsize; /* Maximum read size (0 for none) */ unsigned int wsize; /* Maximum write size (0 for none) */ - unsigned int subreq_counter; /* Next subreq->debug_index */ + atomic_t subreq_counter; /* Next subreq->debug_index */ atomic_t nr_outstanding; /* Number of ops in progress */ atomic_t nr_copy_ops; /* Number of copy-to-cache ops in progress */ size_t submitted; /* Amount submitted for I/O so far */