On Sun, 22 Apr 2001, David L. Parsley wrote:
> Hi,
>
> I'm still working on a packaging system for diskless (quasi-embedded)
> devices. The root filesystem is all tmpfs, and I attach packages inside
> it. Since symlinks in a tmpfs filesystem cost 4k each (ouch!), I'm
> considering using mount --bind for everything. This appears to use very
> little memory, but I'm wondering if I'll run into problems when I start
> having many hundreds of bind mountings. Any feel for this?
Memory use is sizeof(struct vfsmount) per binding. In principle, you can get
in trouble when size of /proc/mount will get past 4Kb - you'll get only
first 4 (actually 3, IIRC) kilobytes, so stuff that relies on the contents
of said file may get unhappy. It's fixable, though.
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