Re: [PATCH] cputime_t patches broke RLIMIT_CPU

From: Linus Torvalds
Date: Wed Jan 19 2005 - 19:18:50 EST




On Wed, 19 Jan 2005, Roland McGrath wrote:
>
> The RLIMIT_CPU limit is in seconds, not in jiffies.

This patch would seem to have its own problems, though. See:

#define secs_to_cputime(__secs) (msecs_to_jiffies(__secs * HZ))

which means that since there is no overflow checking (not in the current
tree, and not in the fixed one that uses proper parenthesis and *1000, you
can easily end up overflowing in the *1000 case, and causing nasty things.

So would it not be nicer to just keep everything in seconds instead?
Alternatively, seriously fix "secs_to_cputime()" to do the proper thing?
Or did I miss a patch and you already did that?

Linus
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