From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Luck, Tony" Date: Mon, 02 Jun 2003 17:00:28 +0000 Subject: RE: [Linux-ia64] [PATCH] MCA recovery for TLB faults for 2.4 Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org > Are you just blindly trusting that memory is still correct after > getting a TLB error report? Wouldn't you want to have a checksum to > validate that the list of saved translations is probably correct. > Otherwise, it seems to me the TLB purge could make a bad situation > worse. At the moment the trust level is extremely high. Linux doesn't even provide a checksum for the ia64_os_mca_dispatch entry code when it registers it with the SAL. A checksum in the list of saved translations would only be part of reducing the level of trust ... we'd also need to validate that the entire code path has the correct code (not just the entry point). There are several other data items on which the code also relies which a truly paranoid MCA handler would also need to validate. -Tony