From patchwork Mon Dec 10 17:12:53 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vivek Goyal X-Patchwork-Id: 10721957 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 419BA14E2 for ; Mon, 10 Dec 2018 17:19:54 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2486A2AA2B for ; Mon, 10 Dec 2018 17:19:54 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 192082AA7A; Mon, 10 Dec 2018 17:19:54 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 86C6A2AA2B for ; Mon, 10 Dec 2018 17:19:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728418AbeLJRTh (ORCPT ); Mon, 10 Dec 2018 12:19:37 -0500 Received: from mx1.redhat.com ([209.132.183.28]:40774 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728380AbeLJRNf (ORCPT ); Mon, 10 Dec 2018 12:13:35 -0500 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 1A02F13AA6; Mon, 10 Dec 2018 17:13:35 +0000 (UTC) Received: from horse.redhat.com (unknown [10.18.25.234]) by smtp.corp.redhat.com (Postfix) with ESMTP id C7AB55C7AA; Mon, 10 Dec 2018 17:13:34 +0000 (UTC) Received: by horse.redhat.com (Postfix, from userid 10451) id 7259B224266; Mon, 10 Dec 2018 12:13:30 -0500 (EST) From: Vivek Goyal To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: vgoyal@redhat.com, miklos@szeredi.hu, stefanha@redhat.com, dgilbert@redhat.com, sweil@redhat.com, swhiteho@redhat.com Subject: [PATCH 27/52] fuse: Maintain a list of busy elements Date: Mon, 10 Dec 2018 12:12:53 -0500 Message-Id: <20181210171318.16998-28-vgoyal@redhat.com> In-Reply-To: <20181210171318.16998-1-vgoyal@redhat.com> References: <20181210171318.16998-1-vgoyal@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Mon, 10 Dec 2018 17:13:35 +0000 (UTC) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This list will be used selecting fuse_dax_mapping to free when number of free mappings drops below a threshold. Signed-off-by: Vivek Goyal --- fs/fuse/file.c | 8 ++++++++ fs/fuse/fuse_i.h | 7 +++++++ fs/fuse/inode.c | 4 ++++ 3 files changed, 19 insertions(+) diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 449a6b315327..94ad76382a6f 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -275,6 +275,10 @@ static int fuse_setup_one_mapping(struct inode *inode, /* Protected by fi->i_dmap_sem */ fuse_dax_interval_tree_insert(dmap, &fi->dmap_tree); fi->nr_dmaps++; + spin_lock(&fc->lock); + list_add_tail(&dmap->busy_list, &fc->busy_ranges); + fc->nr_busy_ranges++; + spin_unlock(&fc->lock); return 0; } @@ -322,6 +326,10 @@ void fuse_removemapping(struct inode *inode) if (dmap) { fuse_dax_interval_tree_remove(dmap, &fi->dmap_tree); fi->nr_dmaps--; + spin_lock(&fc->lock); + list_del_init(&dmap->busy_list); + fc->nr_busy_ranges--; + spin_unlock(&fc->lock); } if (!dmap) diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 3b17fb336256..e32b0059493b 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -113,6 +113,9 @@ struct fuse_dax_mapping { __u64 end; __u64 __subtree_last; + /* Will connect in fc->busy_ranges to keep track busy memory */ + struct list_head busy_list; + /** Position in DAX window */ u64 window_offset; @@ -856,6 +859,10 @@ struct fuse_conn { /** DAX device, non-NULL if DAX is supported */ struct dax_device *dax_dev; + /* List of memory ranges which are busy */ + unsigned long nr_busy_ranges; + struct list_head busy_ranges; + /* * DAX Window Free Ranges. TODO: This might not be best place to store * this free list diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index 56310d10cd4c..234b9c0c80ab 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -622,6 +622,8 @@ static void fuse_free_dax_mem_ranges(struct list_head *mem_list) /* Free All allocated elements */ list_for_each_entry_safe(range, temp, mem_list, list) { list_del(&range->list); + if (!list_empty(&range->busy_list)) + list_del(&range->busy_list); kfree(range); } } @@ -666,6 +668,7 @@ static int fuse_dax_mem_range_init(struct fuse_conn *fc, range->window_offset = i * FUSE_DAX_MEM_RANGE_SZ; range->length = FUSE_DAX_MEM_RANGE_SZ; list_add_tail(&range->list, &mem_ranges); + INIT_LIST_HEAD(&range->busy_list); allocated_ranges++; } @@ -708,6 +711,7 @@ void fuse_conn_init(struct fuse_conn *fc, struct user_namespace *user_ns, fc->dax_dev = dax_dev; fc->user_ns = get_user_ns(user_ns); INIT_LIST_HEAD(&fc->free_ranges); + INIT_LIST_HEAD(&fc->busy_ranges); } EXPORT_SYMBOL_GPL(fuse_conn_init);