From patchwork Sun May 29 10:31:30 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boaz Harrosh X-Patchwork-Id: 827482 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id p4TAU8v7023766 for ; Sun, 29 May 2011 10:32:01 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752664Ab1E2Kbl (ORCPT ); Sun, 29 May 2011 06:31:41 -0400 Received: from daytona.panasas.com ([67.152.220.89]:46035 "EHLO daytona.panasas.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752497Ab1E2Kbk (ORCPT ); Sun, 29 May 2011 06:31:40 -0400 Received: from fs2.bhalevy.com ([172.17.33.68]) by daytona.panasas.com with Microsoft SMTPSVC(6.0.3790.4675); Sun, 29 May 2011 06:31:39 -0400 From: Boaz Harrosh To: Benny Halevy , Trond Myklebust , NFS list , open-osd Subject: [PATCH 7/8] SQUASHME: Move a check from nfs_pageio_do_add_request to nfs_generic_pg_test Date: Sun, 29 May 2011 13:31:30 +0300 Message-Id: <1306665090-1155-1-git-send-email-bharrosh@panasas.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <4DE21CD5.8070907@panasas.com> References: <4DE21CD5.8070907@panasas.com> X-OriginalArrivalTime: 29 May 2011 10:31:39.0963 (UTC) FILETIME=[987B28B0:01CC1DEB] Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Sun, 29 May 2011 10:32:01 +0000 (UTC) desc->pg_bsize is negotiated with the MDS. But if we are doing pnfs-IO it is not relevent. While at it cleanup nfs_pageio_do_add_request() in light of the less things it needs to do. Signed-off-by: Boaz Harrosh --- fs/nfs/pagelist.c | 27 +++++++++++++-------------- 1 files changed, 13 insertions(+), 14 deletions(-) diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c index 36bb67f..624ec2c 100644 --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -206,6 +206,16 @@ nfs_wait_on_request(struct nfs_page *req) static bool nfs_generic_pg_test(struct nfs_pageio_descriptor *desc, struct nfs_page *prev, struct nfs_page *req) { + /* + * FIXME: ideally we should be able to coalesce all requests + * that are not block boundary aligned, but currently this + * is problematic for the case of bsize < PAGE_CACHE_SIZE, + * since nfs_flush_multi and nfs_pagein_multi assume you + * can have only one struct nfs_page. + */ + if (desc->pg_bsize < PAGE_SIZE) + return 0; + return desc->pg_count + req->wb_bytes <= desc->pg_bsize; } @@ -279,29 +289,18 @@ static bool nfs_can_coalesce_requests(struct nfs_page *prev, static int nfs_pageio_do_add_request(struct nfs_pageio_descriptor *desc, struct nfs_page *req) { - size_t newlen = req->wb_bytes; - if (desc->pg_count != 0) { struct nfs_page *prev; - /* - * FIXME: ideally we should be able to coalesce all requests - * that are not block boundary aligned, but currently this - * is problematic for the case of bsize < PAGE_CACHE_SIZE, - * since nfs_flush_multi and nfs_pagein_multi assume you - * can have only one struct nfs_page. - */ - if (desc->pg_bsize < PAGE_SIZE) - return 0; - newlen += desc->pg_count; prev = nfs_list_entry(desc->pg_list.prev); if (!nfs_can_coalesce_requests(prev, req, desc)) return 0; - } else + } else { desc->pg_base = req->wb_pgbase; + } nfs_list_remove_request(req); nfs_list_add_request(req, &desc->pg_list); - desc->pg_count = newlen; + desc->pg_count += req->wb_bytes; return 1; }