H. Peter Anvin wrote:
On 10/12/2009 04:10 AM, tip-bot for Arjan van de Ven wrote:Commit-ID: c03cb3149daed3e411657e3212d05ae27cf1a874 Gitweb: http://git.kernel.org/tip/c03cb3149daed3e411657e3212d05ae27cf1a874 Author: Arjan van de Ven <arjan@xxxxxxxxxxxxx> AuthorDate: Sun, 11 Oct 2009 10:33:02 -0700 Committer: Ingo Molnar <mingo@xxxxxxx> CommitDate: Mon, 12 Oct 2009 13:06:57 +0200 x86: Relegate CONFIG_PAT and CONFIG_MTRR configurability to EMBEDDED MTRR and PAT support (which got added to CPUs over 10 years ago) are no longer really optional in that more and more things are depending on PAT just working, including various drivers and newer versions of X. (to not even speak of MTRR) Having this as a regular config option just no longer makes sense. This patch relegates CONFIG_X86_PAT to the EMBEDDED category so ultra-embedded can still disable it if they really need to.Should we combine this with removing the whitelist (which is largely vestigial at this point) and replace it with a blacklist (possibly empty)? I still haven't seen any evidence that there are any CPUs which have problems, and PAT support go back all the way to Pentium III -- and page table attributes can be used all the way back to 386, it just excludes the WC type.
I would be in favor of that; other operating systems have been using pat everywhere since the pII days anyway. -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html