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([2001:df0:0:200c:24a0:dd2f:5dc3:c66a]) by smtp.gmail.com with ESMTPSA id a195sm7496505pfa.120.2020.01.30.11.12.26 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 30 Jan 2020 11:12:28 -0800 (PST) Subject: Re: [PATCH 0/5] Rewrite Motorola MMU page-table layout To: Peter Zijlstra Cc: John Paul Adrian Glaubitz , Geert Uytterhoeven , Linux/m68k , Linux Kernel Development , Will Deacon References: <20200129103941.304769381@infradead.org> <20200129115412.GN14914@hirez.programming.kicks-ass.net> <20200129193109.GS14914@hirez.programming.kicks-ass.net> <20200130081623.GW14879@hirez.programming.kicks-ass.net> From: Michael Schmitz Message-ID: Date: Fri, 31 Jan 2020 08:12:23 +1300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <20200130081623.GW14879@hirez.programming.kicks-ass.net> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Sender: linux-m68k-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-m68k@vger.kernel.org Peter, On 30/01/20 9:16 PM, Peter Zijlstra wrote: > Hi Michael, > > On Thu, Jan 30, 2020 at 08:31:13PM +1300, Michael Schmitz wrote: > >> Not much difference: >> >> total used free shared buffers cached >> Mem: 10712 10120 592 0 1860 2276 >> -/+ buffers/cache: 5984 4728 >> Swap: 2097144 1552 2095592 >> >> >> vs. vanilla 5.5rc5: >> total used free shared buffers cached >> Mem: 10716 10104 612 0 1588 2544 >> -/+ buffers/cache: 5972 4744 >> Swap: 2097144 1296 2095848 >> >> By sheer coincidence, the boot with your patch series happened to run a full >> filesystem check on the root filesystem, so I'd say it got a good workout >> re: paging and swapping (even though it's just a paltry 4 GB). > Sweet!, can I translate this into a Tested-by: from you? If the test coverage is sufficient, you may certainly do that. Cheers,     Michael > >> Haven't tried any VM stress testing yet (not sure what to do for that; it's >> been years since I tried that sort of stuff). > I think, this not being SMP, doing what you just did tickled just about > everything there is. > > There is one more potential issue with MMU-gather / TLB invalidate on > m68k (and a whole bunch of other archs) and I have patches for that > (although I now need to redo the m68k one. > > Meanwhile the build robot gifted me with a build issue, and Will had > some nitpicks, so I'll go respin and repost these patches.