From: "Luck, Tony" <tony.luck@intel.com>
To: Jiaqi Yan <jiaqiyan@google.com>, "chu, jane" <jane.chu@oracle.com>
Cc: "nao.horiguchi@gmail.com" <nao.horiguchi@gmail.com>,
"linmiaohe@huawei.com" <linmiaohe@huawei.com>,
"wangkefeng.wang@huawei.com" <wangkefeng.wang@huawei.com>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"osalvador@suse.de" <osalvador@suse.de>,
"rientjes@google.com" <rientjes@google.com>,
"duenwen@google.com" <duenwen@google.com>,
"jthoughton@google.com" <jthoughton@google.com>,
"jgg@nvidia.com" <jgg@nvidia.com>,
"ankita@nvidia.com" <ankita@nvidia.com>,
"peterx@redhat.com" <peterx@redhat.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: RE: [RFC PATCH v1 1/2] mm/memory-failure: introduce global MFR policy
Date: Tue, 15 Oct 2024 23:56:46 +0000 [thread overview]
Message-ID: <SJ1PR11MB6083829F88D5102E94FD80A0FC452@SJ1PR11MB6083.namprd11.prod.outlook.com> (raw)
In-Reply-To: <CACw3F50aJRgR4SCpW6wNJZ6hLt6dmPe3bipfgh9eYbN3GARc-A@mail.gmail.com>
> Another way to "disable hardoffline but still set HWPoison" I can
> think of is, make the HWPOISON flag apply at page_size level, instead
> of always set at the compound head. At least from hugetlb's
> perspective, is it a good idea?
Many years ago someone looked at breaking up hugetlb pages
when a memory error occurred so that just 4K was lost instead
of the entire huge page. At that time the conclusion was that
doing so would require locks to be taken/released around all
hugetlb map/unmap operations. An unacceptable performance
issue for common operations to handle very rare memory error
events.
I don't know if that is still true. There's been a lot of restructure
to memory management code since then.
-Tony
next prev parent reply other threads:[~2024-10-15 23:56 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-24 4:39 [RFC PATCH v1 0/2] Userspace Can Control Memory Failure Recovery Jiaqi Yan
2024-09-24 4:39 ` [RFC PATCH v1 1/2] mm/memory-failure: introduce global MFR policy Jiaqi Yan
2024-10-02 23:50 ` jane.chu
2024-10-03 23:51 ` Jiaqi Yan
2024-10-07 17:24 ` jane.chu
2024-10-10 23:21 ` Jiaqi Yan
2024-10-11 18:28 ` jane.chu
2024-10-11 19:44 ` Luck, Tony
2024-10-11 20:15 ` jane.chu
2024-10-15 23:45 ` Jiaqi Yan
2024-10-15 23:56 ` Luck, Tony [this message]
2024-10-16 0:19 ` jane.chu
2024-10-11 7:04 ` Miaohe Lin
2024-10-15 23:58 ` Jiaqi Yan
2024-09-24 4:39 ` [RFC PATCH v1 2/2] docs: mm: add enable_hard_offline sysctl Jiaqi Yan
2024-10-02 15:02 ` [RFC PATCH v1 0/2] Userspace Can Control Memory Failure Recovery Jason Gunthorpe
2024-10-03 22:45 ` Jiaqi Yan
2024-10-03 22:58 ` Luck, Tony
2024-10-03 23:19 ` Jiaqi Yan
2024-10-03 23:19 ` Jason Gunthorpe
2024-10-04 18:32 ` Jiaqi Yan
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