Re: Drop cache has no effect?

On Tue, 29 Aug 2006 21:21:25 +0200 (MEST)
Jan Engelhardt <jengelh@xxxxxxxxxxxxxxx> wrote:

-rw-r--r-- 1 jengelh users 37816633 2006-07-28 19:25
inkscape-0.44-2.guru.suse101.i686.rpm
-rw-r--r-- 1 jengelh users 297243 2006-08-15 01:13
vmware-any-any-update104.tar.gz

Remains 644.

That would be a vfat problem - the changed permission bits weren't written
back to disk, so when you re-read them from disk (or, more likely, from
blockdev pagecache) they came back with the original values.

Yes, that's _intended_.

Fact:
If you chmod 644 some files on vfat, then unmount and mount it again, they show
up as 755 again. That is ok.

Observation:
Dropping the cache does not imply the 644->755 change observed on unmount.

Conclusion:
Caches not dropped.

Not all caches dropped. It'd be silly to try that - see the implementation.

Running the same command a few more times might wring a couple more dentries
and inodes out of it.
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