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To: linux-mtd@lists.infradead.org
From: Martin Egholm Nielsen <martin@egholm-nielsen.dk>
Date: Mon, 25 Jul 2005 09:20:43 +0200
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References: <dbr15p$90f$1@sea.gmane.org> <42E1DA4C.1000605@elsoft.ch>
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Subject: Re: Howto provoke the long mount times?
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>>In extension of my previous thread regarding the GC blocking writes to
>>the NAND, I have a small additional question:
>>How can I provoke this situation?
>>It suddenly occur "out of nowhere" - having mount times of nearly
>>nothing, to having mount times of minutes (now reduced, though)...
> Most probably you are facing the same problem as i have reported in
> http://lists.infradead.org/pipermail/linux-mtd/2005-May/012675.html
> while creating tar files.
Most likely, yes! :-)
Did you stay with jffs2 or did you turn to yaffs?

> In the meantime i can provoke the same effect also be "copying" serveral
> hundred small files (~ 700 bytes) to the NAND flash using the following
> "poor mans" copy routine:

> static void
> Copy(FILE *fi, FILE *fo, size_t bsize)
> {
> 	size_t rlen, wlen;
> 	char buf[BUFFERSIZE];
> 
> 	while (!feof(fi)) {
> 		rlen = fread(&buf, 1, bsize, fi);
> 		wlen = fwrite(&buf, 1, rlen, fo);
> 		fflush(fo);
> 
> 		if (rlen != wlen)
> 			return;
> 	}
> }
> 
> 
> Please note the "fflush()" after the "fwrite()". By varying the "bsize"
> parameter and the numbers of files to copy, you should be able to select
> the "desired" delay during mount time.

Super! Nice to have in case I "repair" (flash_eraseall) the flashes I 
have, but need to test the behaviour for future versions...

BR,
  Martin