Messages in this thread | | | Date | Fri, 12 Nov 1999 04:09:24 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: [Patch] shm bug introduced with pagecache in 2.3.11 |
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On Fri, 12 Nov 1999, Manfred wrote: > > I don't like the semaphore, because (AFAICS, I'm only looking at the diff) > you single-thread the swapin code (per-segment, but still single thread)
I think the semaphore is a good idea, if only because it makes things much more obviously correct - exactly because of the clear serialization. And I don't think the serialization is a performance problem, because by the time you start paging we're not talking about high performance shared memory anyway, and because it's per-segment it is notgoing to make "system" performance any worse.
In fact, my reaction to the semaphore is "do we actually need the spinlock any more"?
Linus
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