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From: Deepanshu Kartikey <kartikey406@gmail.com>
To: sashal@kernel.org, stable@vger.kernel.org,
	stable-commits@vger.kernel.org
Cc: muchun.song@linux.dev, osalvador@suse.de, david@redhat.com
Subject: Re: Patch "hugetlbfs: skip VMAs without shareable locks in hugetlb_vmdelete_list" has been added to the 6.17-stable tree
Date: Mon, 13 Oct 2025 06:55:00 +0530	[thread overview]
Message-ID: <20251013012500.16338-1-kartikey406@gmail.com> (raw)

Hi Sasha,

Please do NOT backport commit dd83609b8898 alone to stable. This patch 
causes a regression in fallocate(PUNCH_HOLE) operations where pages are 
not freed immediately, as reported by Mark Brown.

The fix for this regression is already in linux-next as commit 
91a830422707 ("hugetlbfs: check for shareable lock before calling 
huge_pmd_unshare()").

Please backport both commits together to avoid introducing the 
regression in stable kernels:
- dd83609b88986f4add37c0871c3434310652ebd5 ("hugetlbfs: skip VMAs without shareable locks in hugetlb_vmdelete_list")
- 91a830422707a62629fc4fbf8cdc3c8acf56ca64  ("hugetlbfs: check for shareable lock before calling huge_pmd_unshare()")

Thanks,
Deepanshu Kartikey

             reply	other threads:[~2025-10-13  1:25 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-10-13  1:25 Deepanshu Kartikey [this message]
2025-10-13 13:35 ` Patch "hugetlbfs: skip VMAs without shareable locks in hugetlb_vmdelete_list" has been added to the 6.17-stable tree Greg KH

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