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Mon, 12 Feb 2024 09:32:52 +0000 (UTC) Date: Mon, 12 Feb 2024 10:32:46 +0100 From: Borislav Petkov To: "Naik, Avadhut" Cc: Sohil Mehta , x86@kernel.org, linux-edac@vger.kernel.org, tony.luck@intel.com, linux-kernel@vger.kernel.org, yazen.ghannam@amd.com, Avadhut Naik Subject: Re: [PATCH 2/2] x86/MCE: Add command line option to extend MCE Records pool Message-ID: <20240212093246.GBZcnlvkPKDC8C7rv5@fat_crate.local> References: <8b4f8ec2-7534-4f77-b44f-6728c699ff64@intel.com> <51255499-0b5d-45c6-9c72-f353bae83c0d@amd.com> <20240209200920.GFZcaGcOr757W9O3IG@fat_crate.local> <7a4945b0-322a-444e-a0ca-860a062a49c3@amd.com> <20240209205111.GGZcaQP1gb6C9m0WZB@fat_crate.local> <5DB0FF8D-C6DA-45DC-B287-201A9BF48BDA@alien8.de> <75ddf61d-8dda-47fa-9da0-24221feb22a2@amd.com> <20240211111455.GAZcisL09LeFPWa2EI@fat_crate.local> <774e7ca5-154d-4ca4-bc4c-2f945c20b938@amd.com> <20240212085801.GAZcndma4UTPtKm33e@fat_crate.local> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20240212085801.GAZcndma4UTPtKm33e@fat_crate.local> On Mon, Feb 12, 2024 at 09:58:01AM +0100, Borislav Petkov wrote: > * Can you think of a slick deduplication scheme instead of blindly > raising the buffer size? And here's the simplest scheme: you don't extend the buffer. On overflow, you say "Buffer full, here's the MCE" and you dump the error long into dmesg. Problem solved. A slicker deduplication scheme would be even better, tho. Maybe struct mce.count which gets incremented instead of adding the error record to the buffer again. And so on... -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette