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Shutemov" To: Aaron Lu Cc: Dave Hansen , Rick Edgecombe , Song Liu , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [RFC PATCH 0/4] x86/mm/cpa: merge small mappings whenever possible Message-ID: <20220809175621.qq4ksi6zzqpon7e6@box> References: <20220808145649.2261258-1-aaron.lu@intel.com> <20220809100408.rm6ofiewtty6rvcl@box> <43c610f9-8671-519c-108f-9996e219c249@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <43c610f9-8671-519c-108f-9996e219c249@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Aug 09, 2022 at 10:58:18PM +0800, Aaron Lu wrote: > Hi Kirill, > > Thanks a lot for the feedback. > > On 8/9/2022 6:04 PM, Kirill A. Shutemov wrote: > > On Mon, Aug 08, 2022 at 10:56:45PM +0800, Aaron Lu wrote: > >> This is an early RFC. While all reviews are welcome, reviewing this code > >> now will be a waste of time for the x86 subsystem maintainers. I would, > >> however, appreciate a preliminary review from the folks on the to and cc > >> list. I'm posting it to the list in case anyone else is interested in > >> seeing this early version. > > > > Last time[1] I tried to merge pages back in direct mapping it lead to > > substantial performance regression for some workloads. I cannot find the > > report right now, but I remember it was something graphics related. > > > > Do you happen to remember the workload name? I can try running it. No, sorry. As I said, I tried to find the report, but failed. -- Kiryl Shutsemau / Kirill A. Shutemov