>>>>> "Natalie" == Natalie Protasevich <protasnb@xxxxxxxxx> writes: Natalie> From: Natalie Protasevich <protasnb@xxxxxxxxx> Natalie> This patch allows to disable ptc.g. The code used to be in Natalie> the kernel, then was removed in 2.4 since the bug that it was Natalie> fixing has gone away. However, some large system vendors now Natalie> want this capability available through a means that can be Natalie> controlled by the platform in the event that there is an Natalie> issue with either processor or their chipset where global Natalie> ptc.g is not operational. They want the mechanism for future Natalie> platforms to work around such issues. It is also needed for Natalie> platform makers when they deliberately do not use the global Natalie> cache purge in their chipset implementation. (For such cases, Natalie> Intel provided a SAL table entry to specify if ptc.g is Natalie> allowed and how many). If you need a special TLB purge implementation, please use the machine vector as we do on the sn2 architecture - there is no reason to implement a boot time option for this. Who are these large system vendors who want this patch in? I presume it's not the people running gmail? :-) Cheers, Jes - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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