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Mon, 9 Dec 2024 18:07:48 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id ta3yBPQxV2fnRQAAD6G6ig (envelope-from ); Mon, 09 Dec 2024 18:07:48 +0000 Message-ID: Date: Mon, 9 Dec 2024 19:07:47 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 1/2] Introduce cpu_icache_is_aliasing() across all architectures Content-Language: en-US To: Zi Yan , linux-mm@kvack.org, Andrew Morton , Geert Uytterhoeven , Mathieu Desnoyers Cc: David Hildenbrand , "Matthew Wilcox (Oracle)" , Miaohe Lin , Kefeng Wang , John Hubbard , "Huang, Ying" , Ryan Roberts , Alexander Potapenko , Kees Cook , Vineet Gupta , linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org References: <20241207171631.2853336-1-ziy@nvidia.com> From: Vlastimil Babka Autocrypt: addr=vbabka@suse.cz; keydata= xsFNBFZdmxYBEADsw/SiUSjB0dM+vSh95UkgcHjzEVBlby/Fg+g42O7LAEkCYXi/vvq31JTB KxRWDHX0R2tgpFDXHnzZcQywawu8eSq0LxzxFNYMvtB7sV1pxYwej2qx9B75qW2plBs+7+YB 87tMFA+u+L4Z5xAzIimfLD5EKC56kJ1CsXlM8S/LHcmdD9Ctkn3trYDNnat0eoAcfPIP2OZ+ 9oe9IF/R28zmh0ifLXyJQQz5ofdj4bPf8ecEW0rhcqHfTD8k4yK0xxt3xW+6Exqp9n9bydiy tcSAw/TahjW6yrA+6JhSBv1v2tIm+itQc073zjSX8OFL51qQVzRFr7H2UQG33lw2QrvHRXqD Ot7ViKam7v0Ho9wEWiQOOZlHItOOXFphWb2yq3nzrKe45oWoSgkxKb97MVsQ+q2SYjJRBBH4 8qKhphADYxkIP6yut/eaj9ImvRUZZRi0DTc8xfnvHGTjKbJzC2xpFcY0DQbZzuwsIZ8OPJCc LM4S7mT25NE5kUTG/TKQCk922vRdGVMoLA7dIQrgXnRXtyT61sg8PG4wcfOnuWf8577aXP1x 6mzw3/jh3F+oSBHb/GcLC7mvWreJifUL2gEdssGfXhGWBo6zLS3qhgtwjay0Jl+kza1lo+Cv BB2T79D4WGdDuVa4eOrQ02TxqGN7G0Biz5ZLRSFzQSQwLn8fbwARAQABzSBWbGFzdGltaWwg QmFia2EgPHZiYWJrYUBzdXNlLmN6PsLBlAQTAQoAPgIbAwULCQgHAwUVCgkICwUWAgMBAAIe AQIXgBYhBKlA1DSZLC6OmRA9UCJPp+fMgqZkBQJkBREIBQkRadznAAoJECJPp+fMgqZkNxIQ ALZRqwdUGzqL2aeSavbum/VF/+td+nZfuH0xeWiO2w8mG0+nPd5j9ujYeHcUP1edE7uQrjOC Gs9sm8+W1xYnbClMJTsXiAV88D2btFUdU1mCXURAL9wWZ8Jsmz5ZH2V6AUszvNezsS/VIT87 AmTtj31TLDGwdxaZTSYLwAOOOtyqafOEq+gJB30RxTRE3h3G1zpO7OM9K6ysLdAlwAGYWgJJ V4JqGsQ/lyEtxxFpUCjb5Pztp7cQxhlkil0oBYHkudiG8j1U3DG8iC6rnB4yJaLphKx57NuQ PIY0Bccg+r9gIQ4XeSK2PQhdXdy3UWBr913ZQ9AI2usid3s5vabo4iBvpJNFLgUmxFnr73SJ KsRh/2OBsg1XXF/wRQGBO9vRuJUAbnaIVcmGOUogdBVS9Sun/Sy4GNA++KtFZK95U7J417/J Hub2xV6Ehc7UGW6fIvIQmzJ3zaTEfuriU1P8ayfddrAgZb25JnOW7L1zdYL8rXiezOyYZ8Fm ZyXjzWdO0RpxcUEp6GsJr11Bc4F3aae9OZtwtLL/jxc7y6pUugB00PodgnQ6CMcfR/HjXlae h2VS3zl9+tQWHu6s1R58t5BuMS2FNA58wU/IazImc/ZQA+slDBfhRDGYlExjg19UXWe/gMcl De3P1kxYPgZdGE2eZpRLIbt+rYnqQKy8UxlszsBNBFsZNTUBCACfQfpSsWJZyi+SHoRdVyX5 J6rI7okc4+b571a7RXD5UhS9dlVRVVAtrU9ANSLqPTQKGVxHrqD39XSw8hxK61pw8p90pg4G /N3iuWEvyt+t0SxDDkClnGsDyRhlUyEWYFEoBrrCizbmahOUwqkJbNMfzj5Y7n7OIJOxNRkB IBOjPdF26dMP69BwePQao1M8Acrrex9sAHYjQGyVmReRjVEtv9iG4DoTsnIR3amKVk6si4Ea X/mrapJqSCcBUVYUFH8M7bsm4CSxier5ofy8jTEa/CfvkqpKThTMCQPNZKY7hke5qEq1CBk2 wxhX48ZrJEFf1v3NuV3OimgsF2odzieNABEBAAHCwXwEGAEKACYCGwwWIQSpQNQ0mSwujpkQ PVAiT6fnzIKmZAUCZAUSmwUJDK5EZgAKCRAiT6fnzIKmZOJGEACOKABgo9wJXsbWhGWYO7mD 8R8mUyJHqbvaz+yTLnvRwfe/VwafFfDMx5GYVYzMY9TWpA8psFTKTUIIQmx2scYsRBUwm5VI EurRWKqENcDRjyo+ol59j0FViYysjQQeobXBDDE31t5SBg++veI6tXfpco/UiKEsDswL1WAr tEAZaruo7254TyH+gydURl2wJuzo/aZ7Y7PpqaODbYv727Dvm5eX64HCyyAH0s6sOCyGF5/p eIhrOn24oBf67KtdAN3H9JoFNUVTYJc1VJU3R1JtVdgwEdr+NEciEfYl0O19VpLE/PZxP4wX PWnhf5WjdoNI1Xec+RcJ5p/pSel0jnvBX8L2cmniYnmI883NhtGZsEWj++wyKiS4NranDFlA HdDM3b4lUth1pTtABKQ1YuTvehj7EfoWD3bv9kuGZGPrAeFNiHPdOT7DaXKeHpW9homgtBxj 8aX/UkSvEGJKUEbFL9cVa5tzyialGkSiZJNkWgeHe+jEcfRT6pJZOJidSCdzvJpbdJmm+eED w9XOLH1IIWh7RURU7G1iOfEfmImFeC3cbbS73LQEFGe1urxvIH5K/7vX+FkNcr9ujwWuPE9b 1C2o4i/yZPLXIVy387EjA6GZMqvQUFuSTs/GeBcv0NjIQi8867H3uLjz+mQy63fAitsDwLmR EP+ylKVEKb0Q2A== In-Reply-To: <20241207171631.2853336-1-ziy@nvidia.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Action: no action X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 3780E20005 X-Stat-Signature: j7oke6jgeb4c7cyhkyragfidi5wy1j3f X-Rspam-User: X-HE-Tag: 1733767648-185208 X-HE-Meta: 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 99ZYhTvm 6glRnaWJIoAkIWK8tJSqf25cXI8cB5VITFYQeizfu1ZPm2YlN6+2PS1JzeevkxZMc1XNxIK9QpNZj9n7bnAAM5xRAZ6KO2BYJUbiZKEmaua5NgEu2i22iiHik9589neKW2p+AG88EjaRQDhxTsnSw4sPSopspYtL6byC7rtdvo0R3gjlvDOiOMb0Jvr39VXRZGC7sUl1TxeAozXevqoriX+66peOZ34e4M2DcRXZ//VIhGlEAQE/lMExi7uIT8orcf4mBkOYTmxpJ1fqM1PP4G17rML42whBo20vVd6VArePpbtSrKiysQRbtQl6DYrQoaIbd+nymBacrD2js6pkHEXjB8fpFvJ5WGyEn2QUIm0XYv0mBs3OUw38J0qLxdxq9EfYWal0ls383mCBWVcpzaA5pY4K+trHLnZJW X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, 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 12/7/24 18:16, Zi Yan wrote: > In commit eacd0e950dc2 ("ARC: [mm] Lazy D-cache flush (non aliasing > VIPT)"), arc adds the need to flush dcache to make icache see the code > page change. This also requires special handling for > clear_user_(high)page(). Introduce cpu_icache_is_aliasing() to make > MM code query special clear_user_(high)page() easier. This will be used > by the following commit. > > Suggested-by: Mathieu Desnoyers > Signed-off-by: Zi Yan > Reviewed-by: Mathieu Desnoyers Acked-by: Vlastimil Babka Note this is mm-hotfixes material due to patch 2 fixing an rc1 bug. It's better to say that in the subject i.e. [PATCH mm-hotfixes v4 ...] next time.