On Fri, 2009-12-18 at 18:03 +0800, JiSheng Zhang wrote:
> Hi Charles,
>
> 2009/12/16 Charles Manning <manningc2@actrix.gen.nz>:
> > On Wednesday 16 December 2009 16:36:02 JiSheng Zhang wrote:
> >> 2009/12/16 JiSheng Zhang <jszhang3@gmail.com>:
> >> > Hi list,
> >> >
> >> > First mount an empty partition, then cp some files to the mnt dir then
> >> > run "df", and then delete all the files, then run "df" again. df
> >> > report this time is wrong. It seems that the chunks occupied by
> >> > unlinked files aren't recycled until needed.
> >> >
> >> > Is this a bug or characteristic?
> >
> > I don't see that problem.
> >
> > root@linux-dual-head:/opt/y/cvs/yaffs2# mount -t yaffs2 /dev/mtdblock0 /mnt
> > root@linux-dual-head:/opt/y/cvs/yaffs2# df
> > Filesystem 1K-blocks Used Available Use% Mounted on
> > /dev/mtdblock0 65536 1152 64384 2% /mnt
>
> Here used blocks is 1152.
>
> > root@linux-dual-head:/opt/y/cvs/yaffs2# cp * /mnt
> > root@linux-dual-head:/opt/y/cvs/yaffs2# df
> > Filesystem 1K-blocks Used Available Use% Mounted on
> > /dev/mtdblock0 65536 5860 59676 9% /mnt
> > root@linux-dual-head:/opt/y/cvs/yaffs2# rm /mnt/*
> > root@linux-dual-head:/opt/y/cvs/yaffs2# df
> > Filesystem 1K-blocks Used Available Use% Mounted on
> > /dev/mtdblock0 65536 1156 64380 2% /mnt
>
> Here used blocks is 1156. So there are 4 blocks lost.
Would that be the root directory? I wonder if:
mount -t yaffs2 /dev/mtdblock0 /mnt
df
ls -ld /mnt
cp * /mnt
df
ls -ld /mnt
rm /mnt/*
df
ls -ld /mnt
would show that the root directory uses the 4 blocks to hold the
directory entries for the files copied in.
Is there code to garbage collect directories when the entries are
deleted?
> Regards,
> Jisheng
>
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--
Peter Barada <
peterb@logicpd.com>
Logic Product Development, Inc.
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