Return-Path: Received: from mx2.netapp.com ([216.240.18.37]:20886 "EHLO mx2.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755558Ab1CWMaj (ORCPT ); Wed, 23 Mar 2011 08:30:39 -0400 From: Fred Isaman To: linux-nfs@vger.kernel.org Cc: Trond Myklebust Subject: [PATCH 07/11] NFSv4.1: alloc and free commit_buckets Date: Wed, 23 Mar 2011 08:30:08 -0400 Message-Id: <1300883412-32296-8-git-send-email-iisaman@netapp.com> In-Reply-To: <1300883412-32296-1-git-send-email-iisaman@netapp.com> References: <1300883412-32296-1-git-send-email-iisaman@netapp.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: Content-Type: text/plain MIME-Version: 1.0 Create a preallocated list header to hold nfs_pages for each non-MDS COMMIT destination. Note this is not necessarily each DS, but is basically each pair. Signed-off-by: Fred Isaman --- fs/nfs/nfs4filelayout.c | 22 ++++++++++++++++++++++ fs/nfs/nfs4filelayout.h | 2 ++ 2 files changed, 24 insertions(+), 0 deletions(-) diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c index 9401afd..03ff80c 100644 --- a/fs/nfs/nfs4filelayout.c +++ b/fs/nfs/nfs4filelayout.c @@ -503,6 +503,7 @@ filelayout_free_lseg(struct pnfs_layout_segment *lseg) dprintk("--> %s\n", __func__); nfs4_fl_put_deviceid(fl->dsaddr); + kfree(fl->commit_buckets); _filelayout_free_lseg(fl); } @@ -524,6 +525,27 @@ filelayout_alloc_lseg(struct pnfs_layout_hdr *layoutid, _filelayout_free_lseg(fl); return NULL; } + + /* This assumes there is only one IOMODE_RW lseg. What + * we really want to do is have a layout_hdr level + * dictionary of keys, each + * associated with a struct list_head, populated by calls + * to filelayout_write_pagelist(). + * */ + if ((!fl->commit_through_mds) && (lgr->range.iomode == IOMODE_RW)) { + int i; + int size = (fl->stripe_type == STRIPE_SPARSE) ? + fl->dsaddr->ds_num : fl->dsaddr->stripe_count; + + fl->commit_buckets = kcalloc(size, sizeof(struct list_head), GFP_KERNEL); + if (!fl->commit_buckets) { + filelayout_free_lseg(&fl->generic_hdr); + return NULL; + } + fl->number_of_buckets = size; + for (i = 0; i < size; i++) + INIT_LIST_HEAD(&fl->commit_buckets[i]); + } return &fl->generic_hdr; } diff --git a/fs/nfs/nfs4filelayout.h b/fs/nfs/nfs4filelayout.h index ee0c907..085a354 100644 --- a/fs/nfs/nfs4filelayout.h +++ b/fs/nfs/nfs4filelayout.h @@ -79,6 +79,8 @@ struct nfs4_filelayout_segment { struct nfs4_file_layout_dsaddr *dsaddr; /* Point to GETDEVINFO data */ unsigned int num_fh; struct nfs_fh **fh_array; + struct list_head *commit_buckets; /* Sort commits to ds */ + int number_of_buckets; }; static inline struct nfs4_filelayout_segment * -- 1.7.2.1