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	=?iso-8859-1?Q?J=F6rn_Engel?= <joern@wohnheim.fh-wedel.de>
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Date: Wed, 16 Apr 2003 23:30:44 +0900
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Subject: Re: Database on JFFS2?
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Hi.

On Wednesday 16 April 2003 13:13, Jörn Engel wrote:
> On Wed, 16 April 2003 13:35:50 +0200, Thomas Gleixner wrote:
> > [lots of good information]
> >
> > JFSS2 does no write on fsync, as data are already written.
>
> This is true for NOR, but how about the wbuf for NAND? How does that
> respond to sync/fsync?
Sync triggers flush_wbuf.
NAND uses a writebuffer of page_size, which is 256 / 512 Byte depending on the
chip type.

> iirc it used to ignore sync completely so people could potentially get
> into trouble if they write-sync-poweroff with <2s between write and
> poweroff.
write - sync -poweroff works on NAND. flush_wbuf is also triggered on umount.

I think that sys_sync is not supported yet, as is written in jffs2/Todo, right?

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