Re: [PATCH] Re: 2.1.xxx makes Electric Fence 22x slower

Alan Cox (alan@lxorguk.ukuu.org.uk)
Fri, 4 Sep 1998 19:14:57 +0100 (BST)


> Objectstore (see [1]) is an object-oriented database which uses a lot
> of VMAs. On DEC OSF/1 3.2, they have problems because the kernel does
> not support a lot of VMAs, see [2], [3].

Texas has the same problem. Especially on a 386 (its not that noticable
unless you have a lot of objects on a 486).

Another one is lpmud compiled to use its mmap mode.

Also glibc will create a lot of vmas if you do the right pattern of mallocs
(as it uses mmap). I can only create this one deliberately however.

Alan

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