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Sat, 26 Jul 2025 08:28:08 +0800 Content-Type: multipart/alternative; boundary="------------cKk00zsXUmPcVSbNLXlr1Q6P" Message-ID: Date: Sat, 26 Jul 2025 08:28:08 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] mm/memory-failure: hold PTL in hwpoison_hugetlb_range To: Andrew Morton CC: , , , , , , , , , , , , , , , , , References: <20250724090958.455887-1-tujinjiang@huawei.com> <20250725033112.2690158-1-tujinjiang@huawei.com> <20250725162913.5ab54fa56b8b67c749cff948@linux-foundation.org> From: Jinjiang Tu In-Reply-To: <20250725162913.5ab54fa56b8b67c749cff948@linux-foundation.org> X-Originating-IP: [10.174.178.49] X-ClientProxiedBy: kwepems200002.china.huawei.com (7.221.188.68) To kwepemo200002.china.huawei.com (7.202.195.209) X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: D35DB40007 X-Stat-Signature: brrtqtab3ojywuoh5ywsupzpdzcs6tw4 X-Rspam-User: X-HE-Tag: 1753489695-69027 X-HE-Meta: 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 VOeixPHI 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 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: --------------cKk00zsXUmPcVSbNLXlr1Q6P Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 8bit 在 2025/7/26 7:29, Andrew Morton 写道: > On Fri, 25 Jul 2025 11:31:12 +0800 Jinjiang Tu wrote: > >> Hold PTL in hwpoison_hugetlb_range() to avoid operating on stale page, as >> hwpoison_pte_range() have done. > Does this fix any known runtime issues? Or is it expected to? It doesn't. There is no known issues, PTL is expected to hold like PTE handling to avoid poissible issues. So, there is no need to backport it. > > In other words, do we have reason to backport this fix into earlier > kernels? > > --------------cKk00zsXUmPcVSbNLXlr1Q6P Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: 8bit


在 2025/7/26 7:29, Andrew Morton 写道:
On Fri, 25 Jul 2025 11:31:12 +0800 Jinjiang Tu <tujinjiang@huawei.com> wrote:


Hold PTL in hwpoison_hugetlb_range() to avoid operating on stale page, as
hwpoison_pte_range() have done.

Does this fix any known runtime issues?  Or is it expected to?
It doesn't. There is no known issues, PTL is expected to hold like PTE handling to avoid poissible issues.

So, there is no need to backport it.

In other words, do we have reason to backport this fix into earlier
kernels?
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