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Sun, 09 Feb 2025 20:02:11 -0800 (PST) Message-ID: <8c71f41e-3733-4100-ab55-1176998ced29@bytedance.com> Date: Mon, 10 Feb 2025 12:02:05 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: xfs/folio splat with v6.14-rc1 Content-Language: en-US To: Zi Yan Cc: Matthew Wilcox , Qi Zheng , Christian Brauner , "Darrick J . Wong" , Dave Chinner , linux-mm@kvack.org, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, Jann Horn , David Hildenbrand References: <20250207-anbot-bankfilialen-acce9d79a2c7@brauner> <20250207-handel-unbehagen-fce1c4c0dd2a@brauner> <2766D04E-5A04-4BF6-A2A3-5683A3054973@nvidia.com> From: Qi Zheng In-Reply-To: <2766D04E-5A04-4BF6-A2A3-5683A3054973@nvidia.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 5BAF21A000D X-Stat-Signature: axf1pwz9qmoy9okmxc8g5d4nr6qqm9h5 X-Rspam-User: X-HE-Tag: 1739160133-525210 X-HE-Meta: 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 5rbfiLBB wPh3vePIulagASBykqgq9btHjwb8v4RWRb29UGg1Nn2qj03wKT0MBHEhF2bU5E3j2FMoYLEOrAw0lqB6lJev68jR8lyspq+yQVl5r5cyTmCMOXhujNgFz+A9Dn3WGtEWXRLGm90wpveznZPCgp5r5yQHJo2p5uJqy+SBWIlYgb4kdk2A6x3RBXoRqBhY8XEZqmyjPVzJRgYSuZMtlrPjhupevIQvuGOHWVRYNm24x8IG1LnMzk/k4EY2NLFNbY+CsqcjjqiFGzBSlhApMs7RXI04V3La5xHh9kDrp1BoOH+zuTAsQju0C1HT3mDbuvVWIJ563y5q0rn1lVomoNT1iDpO9Tg== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000618, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Zi, On 2025/2/10 11:35, Zi Yan wrote: > On 7 Feb 2025, at 17:17, Matthew Wilcox wrote: > >> On Fri, Feb 07, 2025 at 04:29:36PM +0100, Christian Brauner wrote: >>> while true; do ./xfs.run.sh "generic/437"; done >>> >>> allows me to reproduce this fairly quickly. >> >> on holiday, back monday > > git bisect points to commit > 4817f70c25b6 ("x86: select ARCH_SUPPORTS_PT_RECLAIM if X86_64"). > Qi is cc'd. > > After deselect PT_RECLAIM on v6.14-rc1, the issue is gone. > At least, no splat after running for more than 300s, > whereas the splat is usually triggered after ~20s with > PT_RECLAIM set. The PT_RECLAIM mainly made the following two changes: 1) try to reclaim page table pages during madvise(MADV_DONTNEED) 2) Unconditionally select MMU_GATHER_RCU_TABLE_FREE Will ./xfs.run.sh "generic/437" perform the madvise(MADV_DONTNEED)? Anyway, I will try to reproduce it locally and troubleshoot it. Thanks! > > -- > Best Regards, > Yan, Zi