Re: Invalidating dentries

[Andrew Morton]

Jan Engelhardt <jengelh@xxxxxxxxxxxxxxx> wrote:
>
> how can I invalidate all buffered/cached dentries so that ls -l /somefolder 
>  will definitely go read the harddisk?

Patch the kernel?

There's no way of doing this apart from unmount/mount, or by forcing a ton
of memory pressure and hoping that the dentries get reclaimed.

A quick way of doing it would be to add a new mount option to the
filesystem and call shrink_dcache_sb() from there.  do `mount -o
remount,shrink_dcache'.

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