Gerd Knorr wrote:
Patching in/out SMP-locking with more than one active CPU would be a pretty silly idea in the first place ;)
No, doing this crap with CPU hotplug is a silly idea. Patching on a real UP system, and then throwing out the tables, makes sense. Keeping two sets of tables for a minimal performance improvement in a very rare configuration (CPU hotplug is the exception, not the rule) is just plain stupid. You probably lose as much performance from the memory hogged up in the tables as you gain from it, and on every system where you have the tables at all you take the hit.
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- References:
- [PATCH 1/10] Cr4 is valid on some 486s
- From: Zachary Amsden <[email protected]>
- Re: [PATCH 1/10] Cr4 is valid on some 486s
- From: Pavel Machek <[email protected]>
- Re: [PATCH 1/10] Cr4 is valid on some 486s
- From: Zachary Amsden <[email protected]>
- Re: [PATCH 1/10] Cr4 is valid on some 486s
- From: Linus Torvalds <[email protected]>
- Re: [PATCH 1/10] Cr4 is valid on some 486s
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- Re: [PATCH 1/10] Cr4 is valid on some 486s
- From: Linus Torvalds <[email protected]>
- Re: [PATCH 1/10] Cr4 is valid on some 486s
- From: Dave Jones <[email protected]>
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- From: Linus Torvalds <[email protected]>
- Re: [PATCH 1/10] Cr4 is valid on some 486s
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- Re: [PATCH 1/10] Cr4 is valid on some 486s
- From: Gerd Knorr <[email protected]>
- Re: [PATCH 1/10] Cr4 is valid on some 486s
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- From: Gerd Knorr <[email protected]>
- Re: [PATCH 1/10] Cr4 is valid on some 486s
- From: Gerd Knorr <[email protected]>
- [RFC] SMP alternatives
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