[Grml] Limit tmpfs RAM across mount points

Michael Prokop mika at grml.org
Thu Jan 18 13:55:49 CET 2007

* Mark <27e3kk302 at sneakemail.com> [20070117 23:15]:

> What is the preferred grml way to limit total tmpfs RAM usage across all
> mount points.  By default tmpfs takes 50% of RAM before swapout.  We
> want a lower threshold of 20% RAM.  With fstab syntax it's possible to
> limit one mount at a time, but is that the best one can do?


> Where is the 50% limit set, for example.

,---- [ $KERNELSOURCE/mm/shmem.c ]
| if (!(sb->s_flags & MS_NOUSER)) {
|     blocks = totalram_pages / 2;

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