From patchwork Thu Jun 20 17:31:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 13706021 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 60F1D1B4C44 for ; Thu, 20 Jun 2024 17:32:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718904751; cv=none; b=dUTduE0tvEMUlyAscTzvOQLaHuAuiyzame9LkyhzxH+SbkN+mzc36vYEeWtS2O9tMgAhWVoumbG2Nine2TDTTFxvZCu0C5zIWuTKlOpJDU4C5NVzgWXaK4wv3lGsDnoM6hpEDtsi6dc8b8pUC43/9Ic1KEYgJSuMzbGEMHdqAZU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718904751; c=relaxed/simple; bh=uqr+c6TSD+IA6jAqPedpS4BUZPZmSd7r1lKskAQEvlI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=py9WJczTm39xrD2cSWHgaDJUZrY7kaE1riAfFNp18vJWqVs78cU0wugio9WkTcgv+2XN6xDUFXMhGvFP/1JW96plHF3Od+PkX3qMMEj0SSfKORqSA4wD3Mduj8NCnIRUbOzQWV8mz93Yry1+3dECxcpAmLGumuBC9HkGgLC4fTU= 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=df/rjwXd; arc=none smtp.client-ip=170.10.129.124 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="df/rjwXd" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1718904748; 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=9Za3sI46DNoDRS2zLMaVKKAo5577Q7Mj2mbpphqJpg8=; b=df/rjwXdnYFcFYjORBxgcSSl6AuVmsBhz5TUgLNZ/9o2TdnPAu85D0wYDZ4VlWGRvT/NOu KzpdMJ2/6Wqb1VYje+/yvNJMU4X+D7DKrMeappLu3THEBAZ1GYck1UpLpK++nEL2hkWqhL ecVU9UNKrtC89+8GjF8LtRPe2Ll2yLY= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-133-lamvqmTDOOq2ya95QZA4mQ-1; Thu, 20 Jun 2024 13:32:23 -0400 X-MC-Unique: lamvqmTDOOq2ya95QZA4mQ-1 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (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 mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 270E61956068; Thu, 20 Jun 2024 17:32:16 +0000 (UTC) Received: from warthog.procyon.org.com (unknown [10.39.195.156]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 7215F3000602; Thu, 20 Jun 2024 17:32:08 +0000 (UTC) From: David Howells To: Christian Brauner , Steve French , Matthew Wilcox Cc: David Howells , Jeff Layton , Gao Xiang , Dominique Martinet , Marc Dionne , Paulo Alcantara , Shyam Prasad N , Tom Talpey , Eric Van Hensbergen , Ilya Dryomov , netfs@lists.linux.dev, 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, Latchesar Ionkov , Christian Schoenebeck , Steve French Subject: [PATCH 03/17] netfs: Fix early issue of write op on partial write to folio tail Date: Thu, 20 Jun 2024 18:31:21 +0100 Message-ID: <20240620173137.610345-4-dhowells@redhat.com> In-Reply-To: <20240620173137.610345-1-dhowells@redhat.com> References: <20240620173137.610345-1-dhowells@redhat.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 During the writeback procedure, at the end of netfs_write_folio(), pending write operations are flushed if the amount of write-streaming data stored in a page is less than the size of the folio because if we haven't modified a folio to the end, it cannot be contiguous with the following folio... except if the dirty region of the folio is right at the end of the folio space. Fix the test to take the offset into the folio into account as well, such that if the dirty region runs right up to the end of the folio, we leave the flushing for later. Fixes: 288ace2f57c9 ("netfs: New writeback implementation") Signed-off-by: David Howells cc: Jeff Layton cc: Eric Van Hensbergen cc: Latchesar Ionkov cc: Dominique Martinet cc: Christian Schoenebeck cc: Marc Dionne cc: Steve French cc: Paulo Alcantara (DFS, global name space) cc: v9fs@lists.linux.dev cc: linux-afs@lists.infradead.org cc: linux-cifs@vger.kernel.org cc: netfs@lists.linux.dev cc: linux-fsdevel@vger.kernel.org --- fs/netfs/write_issue.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/netfs/write_issue.c b/fs/netfs/write_issue.c index 3aa86e268f40..ec6cf8707fb0 100644 --- a/fs/netfs/write_issue.c +++ b/fs/netfs/write_issue.c @@ -483,7 +483,7 @@ static int netfs_write_folio(struct netfs_io_request *wreq, if (!debug) kdebug("R=%x: No submit", wreq->debug_id); - if (flen < fsize) + if (foff + flen < fsize) for (int s = 0; s < NR_IO_STREAMS; s++) netfs_issue_write(wreq, &wreq->io_streams[s]);