From: Janosch Frank <frankja@linux.ibm.com>
To: Yu Zhao <yuzhao@google.com>
Cc: oe-lkp@lists.linux.dev, lkp@intel.com,
Linux Memory Management List <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>,
Muchun Song <muchun.song@linux.dev>,
David Hildenbrand <david@redhat.com>,
Frank van der Linden <fvdl@google.com>,
Matthew Wilcox <willy@infradead.org>,
Peter Xu <peterx@redhat.com>,
Yang Shi <yang@os.amperecomputing.com>,
linux-kernel@vger.kernel.org, ying.huang@intel.com,
feng.tang@intel.com, fengwei.yin@intel.com,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
Marc Hartmayer <mhartmay@linux.ibm.com>,
Heiko Carstens <hca@linux.ibm.com>
Subject: Re: [linux-next:master] [mm/hugetlb_vmemmap] 875fa64577: vm-scalability.throughput -34.3% regression
Date: Wed, 17 Jul 2024 09:52:51 +0200 [thread overview]
Message-ID: <3acefad9-96e5-4681-8014-827d6be71c7a@linux.ibm.com> (raw)
In-Reply-To: <202407091001.1250ad4a-oliver.sang@intel.com>
On 7/9/24 07:11, kernel test robot wrote:
> Hello,
>
> kernel test robot noticed a -34.3% regression of vm-scalability.throughput on:
>
>
> commit: 875fa64577da9bc8e9963ee14fef8433f20653e7 ("mm/hugetlb_vmemmap: fix race with speculative PFN walkers")
> https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
>
> [still regression on linux-next/master 0b58e108042b0ed28a71cd7edf5175999955b233]
>
This has hit s390 huge page backed KVM guests as well.
Our simple start/stop test case went from ~5 to over 50 seconds of runtime.
next prev parent reply other threads:[~2024-07-17 7:57 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-09 5:11 [linux-next:master] [mm/hugetlb_vmemmap] 875fa64577: vm-scalability.throughput -34.3% regression kernel test robot
2024-07-10 6:22 ` Yu Zhao
2024-07-14 12:26 ` Oliver Sang
2024-07-15 2:40 ` Muchun Song
2024-07-15 4:08 ` Oliver Sang
2024-07-17 7:52 ` Janosch Frank [this message]
2024-07-17 7:59 ` Christian Borntraeger
2024-07-17 8:36 ` Yu Zhao
2024-07-17 15:44 ` Yu Zhao
2024-07-18 9:23 ` Marc Hartmayer
2024-07-19 8:42 ` Oliver Sang
2024-07-19 16:06 ` Yu Zhao
2024-08-03 22:07 ` Yu Zhao
2024-08-06 3:01 ` Oliver Sang
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