On Tue, 9 Dec 2008, Yuri Tikhonov wrote:
> The following patch fixes divide-by-zero error for the
> cases of really big PAGE_SIZEs (e.g. 256KB on ppc44x).
> Support for such big page sizes on 44x is not present in the
> current kernel yet, but coming soon.
>
> Also this patch fixes the comment for the max_threads
> settings, as this didn't match the things actually done
> in the code.
>
> Signed-off-by: Yuri Tikhonov <[EMAIL PROTECTED]>
> Signed-off-by: Ilya Yanok <[EMAIL PROTECTED]>
> ---
> kernel/fork.c | 8 ++++++--
> 1 files changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/kernel/fork.c b/kernel/fork.c
> index 2a372a0..b0ac2fb 100644
> --- a/kernel/fork.c
> +++ b/kernel/fork.c
> @@ -181,10 +181,14 @@ void __init fork_init(unsigned long mempages)
>
> /*
> * The default maximum number of threads is set to a safe
> - * value: the thread structures can take up at most half
> - * of memory.
> + * value: the thread structures can take up at most
> + * (1/8) part of memory.
> */
> +#if (8 * THREAD_SIZE) > PAGE_SIZE
> max_threads = mempages / (8 * THREAD_SIZE / PAGE_SIZE);
> +#else
> + max_threads = mempages * PAGE_SIZE / (8 * THREAD_SIZE);
^^^^^^^^^^^^^^^^^^^^
> +#endif
Can't this overflow, e.g. on 32-bit machines with HIGHMEM?
With kind regards,
Geert Uytterhoeven
Software Architect
Sony Techsoft Centre Europe
The Corporate Village · Da Vincilaan 7-D1 · B-1935 Zaventem · Belgium
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