Caching of reads
dwmw2 at infradead.org
Fri Nov 16 10:48:29 EST 2001
icampbell at arcom.co.uk said:
> It seems as if reads from a JFFS2 file system are not being cached as
> we would expect, for instance this small script:
> while true ; do sleep 1; done
> causes a read from the flash every time the sleep is executed. This is
> true even if the fs is mounted read only.
Strange. JFFS2 doesn't do caching - that's supposed to be handle by the
Linux VFS/VM. But set CONFIG_JFFS2_FS_DEBUG=1 and
echo 9 > /proc/sys/kernel/printk, then see what it's actually being asked
to read each time.
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