Messages in this thread | | | Date | Fri, 25 Apr 2008 20:53:50 +0200 | From | Pavel Machek <> | Subject | Re: [PATCH 1/1] x86: fix text_poke |
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On Fri 2008-04-25 08:57:20, H. Peter Anvin wrote: > Ingo Molnar wrote: >> >> text_poke() itself only applies/unapplies the LOCK prefix - a single byte. >> We shouldnt be doing that at all: the cost of LOCK is insignificant (a few >> cycles) and most systems are SMP anyway. >> > > Alas, on older CPUs the cost of LOCK can be massive. The question is how > much we really care - the embedded people (who would definitely be > affected) will simply build UP kernels, and this only affects booting SMP > kernels on UP.
Like... say distros on older hardware? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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