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Date: Tue, 22 Oct 2013 10:45:48 +0800
From: Haicheng Li <haicheng.li@...ux.intel.com>
To: Gu Zheng <guz.fnst@...fujitsu.com>
Cc: Kim <jaegeuk.kim@...sung.com>,
f2fs <linux-f2fs-devel@...ts.sourceforge.net>,
fsdevel <linux-fsdevel@...r.kernel.org>,
linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] f2fs: introduce f2fs_kmem_cache_alloc to hide the
unfailed kmem cache allocation
Looks neat.
Reviewed-by: Haicheng Li <haicheng.li@...ux.intel.com>
On Mon, Oct 21, 2013 at 03:24:55PM +0800, Gu Zheng wrote:
> 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.
>
> Signed-off-by: Gu Zheng <guz.fnst@...fujitsu.com>
> ---
> fs/f2fs/checkpoint.c | 26 +++++++-------------------
> fs/f2fs/f2fs.h | 13 +++++++++++++
> fs/f2fs/gc.c | 8 ++------
> fs/f2fs/node.c | 6 +-----
> 4 files changed, 23 insertions(+), 30 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..fa9ad03 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -787,6 +787,19 @@ 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 = kmem_cache_alloc(cachep, flags);
> +retry:
> + 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..fe3cf8e 100644
> --- a/fs/f2fs/node.c
> +++ b/fs/f2fs/node.c
> @@ -1308,11 +1308,7 @@ static int add_free_nid(struct f2fs_nm_info *nm_i, nid_t nid, bool build)
> if (allocated)
> return 0;
> retry:
> - i = kmem_cache_alloc(free_nid_slab, GFP_NOFS);
> - if (!i) {
> - cond_resched();
> - goto retry;
> - }
> + i = f2fs_kmem_cache_alloc(free_nid_slab, GFP_NOFS);
> i->nid = nid;
> i->state = NID_NEW;
>
> --
> 1.7.7
>
> --
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