linux-kernel - RE: [f2fs-dev] [PATCH] f2fs: fix max orphan inodes calculation

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Message-id: <018001d05271$6cc02c20$46408460$@samsung.com>
Date:	Fri, 27 Feb 2015 17:39:39 +0800
From:	Chao Yu <chao2.yu@...sung.com>
To:	'Wanpeng Li' <wanpeng.li@...ux.intel.com>,
	'Jaegeuk Kim' <jaegeuk@...nel.org>
Cc:	linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net
Subject: RE: [f2fs-dev] [PATCH] f2fs: fix max orphan inodes calculation

Hi Wanpeng,

> -----Original Message-----
> From: Wanpeng Li [mailto:wanpeng.li@...ux.intel.com]
> Sent: Friday, February 27, 2015 3:05 PM
> To: Jaegeuk Kim
> Cc: Wanpeng Li; linux-kernel@...r.kernel.org; linux-f2fs-devel@...ts.sourceforge.net
> Subject: [f2fs-dev] [PATCH] f2fs: fix max orphan inodes calculation
> 
> cp_payload is introduced for sit bitmap to support large volume, and it is
> just after the block of f2fs_checkpoint + nat bitmap, so the first segment
> should include F2FS_CP_PACKS + NR_CURSEG_TYPE + cp_payload + orphan blocks.
> However, current max orphan inodes calculation don't consider cp_payload,
> this patch fix it by reducing the number of cp_payload from total blocks of
> the first segment when calculate max orphan inodes.
> 
> Signed-off-by: Wanpeng Li <wanpeng.li@...ux.intel.com>
> ---
>  fs/f2fs/checkpoint.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
> index db82e09..3c9d677 100644
> --- a/fs/f2fs/checkpoint.c
> +++ b/fs/f2fs/checkpoint.c
> @@ -1109,7 +1109,7 @@ void init_ino_entry_info(struct f2fs_sb_info *sbi)
>  	 * for cp pack we can have max 1020*504 orphan entries

The description above should be wrong, can you please update it in this patch?

>  	 */
>  	sbi->max_orphans = (sbi->blocks_per_seg - F2FS_CP_PACKS -
> -			NR_CURSEG_TYPE) * F2FS_ORPHANS_PER_BLOCK;
> +			NR_CURSEG_TYPE - __cp_payload(sbi)) * F2FS_ORPHANS_PER_BLOCK;

There is a trivial coding style issue: "line over 80 characters"

Thanks,


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