On Wed, Dec 16, 2009 at 8:32 PM, Nagaprabhanjan Bellari <nagp.knb@xxxxxxxxx> wrote:
I learn a trick from Con Kolivas to purge cache...hopefully I recall
it correctly:
# tail /dev/zero
wait for few seconds...watch out to not make it OOM....and most likely
some (if not at all) page cache will be purged out.Are you sure? Does page cache get involved at all while reading this pseudo device?
I ask this because /dev/zero is a character device, so wondering where will page cache come in.
tomahawk>ls -l /dev/zero
crw-rw-rw- 1 root root 1, 5 Nov 13 02:45 /dev/zero
crw-rw-rw- 1 root root 1, 5 Nov 13 02:45 /dev/zero
Thanks,
-nagp
