Re: [patch] take 2 Re: PG_swap_entry bug in recent kernels

Rik van Riel
2000-04-11T17:40:37Z

On Tue, 11 Apr 2000, Andrea Arcangeli wrote:
> On Mon, 10 Apr 2000, Kanoj Sarcar wrote:
>
> >While forking, a parent might copy a swap handle into the child, but we
>
> That's a bug in fork. Simply let fork to check if the swaphandle
> is SWAPOK or not before increasing the swap count. If it's
> SWAPOK then swap_duplicate succesfully,

"it was hard to write, it should be hard to maintain"

Relying on pieces of magic like this, spread out all over
the kernel source will make the code more fragile and hell
to maintain.

Unless somebody writes the documentation for all of this,
of course...

regards,

Rik
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