* will jffs2 write to device when doing "read-only" operation like "ls"?
@ 2002-08-08 4:37 ??
2002-08-08 4:46 ` Allen Curtis
2002-08-08 7:17 ` David Woodhouse
0 siblings, 2 replies; 3+ messages in thread
From: ?? @ 2002-08-08 4:37 UTC (permalink / raw)
To: linux-mtd
dear all,
will jffs2 write to device when doing "read-only" operation like "ls"?
for example, if you do a "ls -lR" then a fs like ext2/minix will write stuff
to block device
(because of put_inode operation),thus might reduce life of nand flash.......
if the answer is yes, is it possible to impore/modify it?
thanks in advanced!:)
^ permalink raw reply [flat|nested] 3+ messages in thread
* RE: will jffs2 write to device when doing "read-only" operation like "ls"?
2002-08-08 4:37 will jffs2 write to device when doing "read-only" operation like "ls"? ??
@ 2002-08-08 4:46 ` Allen Curtis
2002-08-08 7:17 ` David Woodhouse
1 sibling, 0 replies; 3+ messages in thread
From: Allen Curtis @ 2002-08-08 4:46 UTC (permalink / raw)
To: ??, linux-mtd
> will jffs2 write to device when doing "read-only" operation like "ls"?
To my knowledge NO. JFFS and JFFS2 work just fine with read-only devices so
I assume that writing for no reason is not necessary.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: will jffs2 write to device when doing "read-only" operation like "ls"?
2002-08-08 4:37 will jffs2 write to device when doing "read-only" operation like "ls"? ??
2002-08-08 4:46 ` Allen Curtis
@ 2002-08-08 7:17 ` David Woodhouse
1 sibling, 0 replies; 3+ messages in thread
From: David Woodhouse @ 2002-08-08 7:17 UTC (permalink / raw)
To: ??; +Cc: linux-mtd
kevin@gv.com.tw said:
> will jffs2 write to device when doing "read-only" operation like "ls"?
> for example, if you do a "ls -lR" then a fs like ext2/minix will write
> stuff to block device (because of put_inode operation),thus might
> reduce life of nand flash.......
Normal file systems write because they have to update the 'atime' (access
time) field whenever an inode is read. Very few applications actually care
about a correct atime, and JFFS2 does not implement atime.
--
dwmw2
^ permalink raw reply [flat|nested] 3+ messages in thread
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2002-08-08 4:37 will jffs2 write to device when doing "read-only" operation like "ls"? ??
2002-08-08 4:46 ` Allen Curtis
2002-08-08 7:17 ` David Woodhouse
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