From: Thomas Gleixner <tglx@linutronix.de>
To: Brad Campbell <brad@wasp.net.au>
Cc: Patrick Hilt <philt@pioneer-pdt.com>, linux-mtd@lists.infradead.org
Subject: Re: JFFS 2 Question
Date: Sat, 10 Jul 2004 12:18:10 +0200 [thread overview]
Message-ID: <1089454689.3106.3.camel@thomas.tec.linutronix.de> (raw)
In-Reply-To: <40EFB906.7060701@wasp.net.au>
On Sat, 2004-07-10 at 11:38, Brad Campbell wrote:
> Patrick Hilt wrote:
> > Hi list!
> > Is there a way to make sure data is being written to physical flash when using
> > JFFS2? In other words, After writing a file on a JFFS2 partition, is there
> > anything that can be done to make sure that the data is getting written to
> > the flash right away? Would "sync" or "fsync" have that effect?
>
> I believe that jffs2 is a synchronous filesystem in any case. By the time your application has
> returned from the write() call, the data is on flash.
You're right and wrong. :)
On standard NOR FLASH it is synchronous. On NAND/AND FLASH and some
strange NOR FLASH types we must write page aligned and therefor were use
a write buffer of page size, which is either flushed timed by kupdated
or by sync/fsync/ummount.
tglx
next prev parent reply other threads:[~2004-07-10 10:24 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-09 23:08 JFFS 2 Question Patrick Hilt
2004-07-10 9:31 ` Mike Wellington
2004-07-10 9:38 ` Brad Campbell
2004-07-10 10:18 ` Thomas Gleixner [this message]
2004-07-10 11:50 ` Wolfgang Denk
2004-07-15 16:47 ` Patrick Hilt
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