Re: repost: patch for 2.1.108 LDT problems

H. Peter Anvin (hpa@transmeta.com)
7 Jul 1998 20:49:22 GMT

Followup to: <35A178A8.EFB8C3FC@star.net>
By author: Bill Hawes <whawes@star.net>
In newsgroup: linux.dev.kernel
>
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> The attached patch is an update for 2.1.108 of the previous patch to fix
> various LDT-related problems.
>
> The patch ensures that each clone task using an LDT gets its own slot in
> the GDT, in case the prior task exits first. It also adds some sanity
> checks when LDT entries are being changed, and improves the register
> dump routine to display additional information.
>
> The patch is well tested and is necessary to avoid easily-triggered
> oopses when running apps that use LDTs.
>

Wouldn't it be better to keep a refcounter on this and let them share
an LDT? Perhaps that should be a CLONE_ flag?

-hpa

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