Re: 2.3.12 - klogd 100%CPU

Manfred Spraul (manfreds@colorfullife.com)
Fri, 13 Aug 1999 21:45:49 +0200

Andrea Arcangeli wrote:
>
> On Thu, 12 Aug 1999, Manfred Spraul wrote:
>
> >But now my solution is far better. Alloc memory, check that you have
>
> In your solution you are doing a memmove from a to an userspace buffer.
> When you are in kernel you can touch userspace only if you have set a
> fixup entry.

It seems that there is no portable way to copy_to_from_user(), so I
replaced the memmove() with a __put_user()/__get_user() loop.

http://www.colorfullife.com/manfreds/patch-console_lock

Note that you have to disable IRQ's for a byte-wise move of up to 16 kB
memory, this could take quite a long time.

--
	Manfred




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