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Fri, 5 Dec 2025 11:03:14 GMT Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 10EF320049; Fri, 5 Dec 2025 11:03:14 +0000 (GMT) Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2CED22004B; Fri, 5 Dec 2025 11:03:13 +0000 (GMT) Received: from osiris (unknown [9.87.131.209]) by smtpav06.fra02v.mail.ibm.com (Postfix) with ESMTPS; Fri, 5 Dec 2025 11:03:13 +0000 (GMT) Date: Fri, 5 Dec 2025 12:03:11 +0100 From: Heiko Carstens To: Baoquan He Cc: Andrey Konovalov , linux-mm@kvack.org, ryabinin.a.a@gmail.com, glider@google.com, dvyukov@google.com, vincenzo.frascino@arm.com, akpm@linux-foundation.org, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, kexec@lists.infradead.org, elver@google.com, sj@kernel.org, lorenzo.stoakes@oracle.com, snovitoll@gmail.com, christophe.leroy@csgroup.eu, Mikhail Zaslonko Subject: Re: [PATCH v4 00/12] mm/kasan: make kasan=on|off work for all three modes Message-ID: <20251205110311.11813A10-hca@linux.ibm.com> References: <20251128033320.1349620-1-bhe@redhat.com> 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 Content-Transfer-Encoding: 8bit In-Reply-To: X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: Eym7r3xetcUFAk65KHhR67Lgmhyr4aUZ X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTI5MDAwOCBTYWx0ZWRfX7B7O4z0hwN0F PgOIq4ByAtB986RdaLRKvfuMymJWSwBG8yT17AQ+IHImaU5V4iKH22yS3C5KzddRnwhm3s5zhty J8dz5GSoaKbQ+QWsxQ/IMQIucT0AWhv6MkKp+FXlGEa9GYbg7YSn+ENTKp/TTwFRLBsoSbxTllb qvSSpl3oy3rGiW3WU8mRJyX4vV194CHOR93yKCJvGX2OKBr1BLyZUfduF/1ZL7Jy0g0ahlzhDGL q9S00qZyEdjOetvG31YFmuuXki4r0/7SHZr/UJeTmmxjCri8M+QGhX4rmnWXPlxoZICqVXOmPH9 J1Sd2B/Ip0yIec6pnApVTgi8T9oMnMA+jxyng5MunAgiMX4gDXab2LXyFkn+hoMmV1m+DlossCy o4l0uJ04VKST6L6MWkGhMoRvN53nfQ== X-Authority-Analysis: v=2.4 cv=Scz6t/Ru c=1 sm=1 tr=0 ts=6932bbf5 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=IkcTkHD0fZMA:10 a=wP3pNCr1ah4A:10 a=VkNPw1HP01LnGYTKEx00:22 a=20KFwNOVAAAA:8 a=40HSkAYmfyoHoQYM2uIA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-GUID: oD0qT5z5etYDFvofq45rGIQq18lrpDXv X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-12-05_04,2025-12-04_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 phishscore=0 bulkscore=0 lowpriorityscore=0 adultscore=0 clxscore=1011 spamscore=0 impostorscore=0 priorityscore=1501 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2510240000 definitions=main-2511290008 On Fri, Dec 05, 2025 at 03:14:43PM +0800, Baoquan He wrote: > On 12/04/25 at 05:38pm, Andrey Konovalov wrote: > > On Fri, Nov 28, 2025 at 4:33 AM Baoquan He wrote: > > I also wonder if we should keep this kasan=off functionality > > conservative and limit it to x86 and arm64 (since these are the only > > two tested architectures). > > We may not need to do that. I tested on arm64 because it has sw_tags and > hw_tags. And if x86_64 and arm64 works well with kasan=off in generic > mode, it should be fine on other architectures. I am a little more > familiar with operations on x86/arm64 than others. I can manage to get > power system to test kasan=off in generic mode, if that is required. > From my side, I would like to see x86_64/arm64/s390/power to have > kasan=off because RHEL support these architectures. I need consult people > to make clear how to change in s390. Will post patch later or ask other > people to help do that. We are aware that s390 support is missing / does not work, and will provide something. I guess something based on this series would be good, or are you planning to send a new version anytime soon?