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[173.79.56.208]) by smtp.gmail.com with ESMTPSA id af79cd13be357-7c3e534e915sm11780685a.46.2025.03.05.16.09.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Mar 2025 16:09:05 -0800 (PST) Date: Wed, 5 Mar 2025 19:09:02 -0500 From: Gregory Price To: Dave Jiang Cc: lsf-pc@lists.linux-foundation.org, linux-mm@kvack.org, linux-cxl@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [LSF/MM] CXL Boot to Bash - Section 0: ACPI and Linux Resources Message-ID: References: <04e77063-5676-4435-854c-9488075114c5@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 6403A100002 X-Stat-Signature: ezt9iof3gno4wa6c4z8b6xw8mi7ojh7p X-HE-Tag: 1741219747-83086 X-HE-Meta: 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 r8Wtd1+k ybuSSTRxky1P9AKMWvZDaqW/e0sdXhFDu6ABs/ttN60GcUq4vqLXdY2k9kqrir0Ejb9OdhsGqdy8e6P7NAjNgSv2wjASenTzEj707dz6nGIgC9UBe/5b4BjUEwMe0VigOjerHJbXYiXDX1v9PCV18ItDnbwdovNQOeDo6UbAMkPt0wu33GTDHcpG17GMbJCUx3ggSFqiJ98spro+JjBBSwrMN6fx9stUP1t2fBuwbEFunoO5Yp6BAgRkrUdYuzdjkRXSvtIVLIACHtcR08//U+3AU2ZGQhouTHKSr+MQgJNIlSXMbuE5yE9hnVWr9sIy2xC8EBTF0brfakkt1i0LtDt5NP8KTnI1tWVZOkF8tqJoneMBqcPpS8KQVzeRtB3BnWZVw X-Bogosity: Ham, tests=bogofilter, spamicity=0.006067, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, Mar 05, 2025 at 04:41:05PM -0700, Dave Jiang wrote: > I can help write it if there's no great urgency. I'll try to find some time creating a draft and send it your way. > No major urgency, this is a best-attempt at background info before LSF. My goal at LSF is to simply talk about some of the rough edges and misunderstandings and subtleties associated with "bringing up CXL memory in XYZ ways". (e.g. what set of constraints you're actually agreeing to when you bring up CXL in ZONE_MOVABLE or ZONE_NORMAL). On the back half, I imagine re-working this whole thing. The structure here is getting a bit unwieldly - which is to be expected, lots of moving parts from boot to bash :P Maybe we can look at converting this into a set of driver docs or something - though i've been careful not to aggressively define driver-internal operation since it's fluid. ~Gregory