Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753310Ab3JVG6X (ORCPT ); Tue, 22 Oct 2013 02:58:23 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:43141 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1753152Ab3JVG6S (ORCPT ); Tue, 22 Oct 2013 02:58:18 -0400 X-IronPort-AV: E=Sophos;i="4.93,546,1378828800"; d="scan'208";a="8824931" Message-ID: <526620AA.60007@cn.fujitsu.com> Date: Tue, 22 Oct 2013 14:52:26 +0800 From: Gu Zheng User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:7.0.1) Gecko/20110930 Thunderbird/7.0.1 MIME-Version: 1.0 To: Kim CC: f2fs , fsdevel , linux-kernel , Gao feng , Haicheng Li Subject: [PATCH V2] f2fs: introduce f2fs_kmem_cache_alloc to hide the unfailed, kmem cache allocation X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2013/10/22 14:55:41, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2013/10/22 14:55:43, Serialize complete at 2013/10/22 14:55:43 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4379 Lines: 165 Introduce the unfailed version of kmem_cache_alloc named f2fs_kmem_cache_alloc to hide the retry routine and make the code a bit cleaner. v2: Fix the wrong use of 'retry' tag pointed out by Gao feng. Use more neat code to remove redundant tag suggested by Haicheng Li. Signed-off-by: Gu Zheng --- fs/f2fs/checkpoint.c | 26 +++++++------------------- fs/f2fs/f2fs.h | 15 +++++++++++++++ fs/f2fs/gc.c | 8 ++------ fs/f2fs/node.c | 27 +++++++++++---------------- 4 files changed, 35 insertions(+), 41 deletions(-) diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index 8d16071..6fb484c 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -226,12 +226,8 @@ void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino) break; orphan = NULL; } -retry: - new = kmem_cache_alloc(orphan_entry_slab, GFP_ATOMIC); - if (!new) { - cond_resched(); - goto retry; - } + + new = f2fs_kmem_cache_alloc(orphan_entry_slab, GFP_ATOMIC); new->ino = ino; /* add new_oentry into list which is sorted by inode number */ @@ -484,12 +480,8 @@ void set_dirty_dir_page(struct inode *inode, struct page *page) if (!S_ISDIR(inode->i_mode)) return; -retry: - new = kmem_cache_alloc(inode_entry_slab, GFP_NOFS); - if (!new) { - cond_resched(); - goto retry; - } + + new = f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS); new->inode = inode; INIT_LIST_HEAD(&new->list); @@ -506,13 +498,9 @@ retry: void add_dirty_dir_inode(struct inode *inode) { struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); - struct dir_inode_entry *new; -retry: - new = kmem_cache_alloc(inode_entry_slab, GFP_NOFS); - if (!new) { - cond_resched(); - goto retry; - } + struct dir_inode_entry *new = + f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS); + new->inode = inode; INIT_LIST_HEAD(&new->list); diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 171c52f..2949275 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -18,6 +18,7 @@ #include #include #include +#include /* * For mount options @@ -787,6 +788,20 @@ static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name, return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor); } +static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep, + gfp_t flags) +{ + void *entry; +retry: + entry = kmem_cache_alloc(cachep, flags); + if (!entry) { + cond_resched(); + goto retry; + } + + return entry; +} + #define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino) static inline bool IS_INODE(struct page *page) diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index fbad968..7914b92 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -361,12 +361,8 @@ static void add_gc_inode(struct inode *inode, struct list_head *ilist) iput(inode); return; } -repeat: - new_ie = kmem_cache_alloc(winode_slab, GFP_NOFS); - if (!new_ie) { - cond_resched(); - goto repeat; - } + + new_ie = f2fs_kmem_cache_alloc(winode_slab, GFP_NOFS); new_ie->inode = inode; list_add_tail(&new_ie->list, ilist); } diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index ef80f79..4fa3fd5 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -1296,23 +1296,18 @@ static int add_free_nid(struct f2fs_nm_info *nm_i, nid_t nid, bool build) if (nid == 0) return 0; - if (!build) - goto retry; - - /* do not add allocated nids */ - read_lock(&nm_i->nat_tree_lock); - ne = __lookup_nat_cache(nm_i, nid); - if (ne && nat_get_blkaddr(ne) != NULL_ADDR) - allocated = true; - read_unlock(&nm_i->nat_tree_lock); - if (allocated) - return 0; -retry: - i = kmem_cache_alloc(free_nid_slab, GFP_NOFS); - if (!i) { - cond_resched(); - goto retry; + if (build) { + /* do not add allocated nids */ + read_lock(&nm_i->nat_tree_lock); + ne = __lookup_nat_cache(nm_i, nid); + if (ne && nat_get_blkaddr(ne) != NULL_ADDR) + allocated = true; + read_unlock(&nm_i->nat_tree_lock); + if (allocated) + return 0; } + + i = f2fs_kmem_cache_alloc(free_nid_slab, GFP_NOFS); i->nid = nid; i->state = NID_NEW; -- 1.7.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/