On Wed, Jul 2, 2008 at 5:18 PM, Arnd Bergmann <[EMAIL PROTECTED]> wrote: > On Wednesday 02 July 2008, stephane eranian wrote: >> The main worry is the limit on the number of syscall parameters which >> is typically fairly low (8). > > Actually, six is the number of arguments that is safe on all known > architectures, if you go above that, you already have to do extra > work. > >> Of course, this could be compensated by passing a struct instead. > > If you need that many arguments, there is usally another problem > in the interface, so using a struct does not make it better. > > Can you already think of a case where you need more than six arguments? > We don't have any perfmon syscalls with more than 4 arguments. When large amount of information needs to be passed, it is already encapsulated into a structure, e.g., writing the PMU registers.
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