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imf24.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=lge.com; spf=pass (imf24.hostedemail.com: domain of youngjun.park@lge.com designates 156.147.51.103 as permitted sender) smtp.mailfrom=youngjun.park@lge.com ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1781677481; b=NI7K7ud4ATqRAeD4MwZXczcuYn+MUQqO64b3/mxdGy/fa3UZ3iMoTBUxw4NGfiuzK0g1S7 drMKjjEoiamntC8cWlvC/9pgu3ZTRA61muj4P6WwlCPbmtPv6shZ08zhVBDhHBan0vch8u 8V+tyIfolQUCo74mNiXCaQhBpCMp9Lw= Received: from unknown (HELO yjaykim-PowerEdge-T330) (10.177.112.156) by 156.147.51.103 with ESMTP; 17 Jun 2026 15:24:38 +0900 X-Original-SENDERIP: 10.177.112.156 X-Original-MAILFROM: youngjun.park@lge.com Date: Wed, 17 Jun 2026 15:24:38 +0900 From: YoungJun Park To: akpm@linux-foundation.org Cc: chrisl@kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, kasong@tencent.com, hannes@cmpxchg.org, mhocko@kernel.org, roman.gushchin@linux.dev, shakeel.butt@linux.dev, muchun.song@linux.dev, shikemeng@huaweicloud.com, nphamcs@gmail.com, baoquan.he@linux.dev, baohua@kernel.org, yosry@kernel.org, gunho.lee@lge.com, taejoon.song@lge.com, hyungjun.cho@lge.com, mkoutny@suse.com, baver.bae@lge.com, matia.kim@lge.com Subject: Re: [PATCH v8 4/4] mm: swap: filter swap allocation by memcg tier mask Message-ID: References: <20260617053447.2831896-1-youngjun.park@lge.com> <20260617053447.2831896-5-youngjun.park@lge.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260617053447.2831896-5-youngjun.park@lge.com> X-Rspamd-Server: rspam07 X-Rspam-User: X-Stat-Signature: haw6pi56m5iy449zn5c5wqaxywrouwxy X-Rspamd-Queue-Id: C58E6180006 X-HE-Tag: 1781677480-949123 X-HE-Meta: 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 Zn6e6HOE /J7I4ML2tYE5fpV2wNi3ighCDKud2dIqQCnXGNVbVCWYaVebq/+BGjP+0jEhWux9r4a1JHhB4akXnons7FdvKwLj00ret7JZc00MH0SnC/Al2treF/k/Oo904uvrsmrmZ9EsXSIrmB8b8465cvib+GQhytXroOzNN0BpiUuWU6fVOP4s9yOSRCHDIaNFemRozMiwi81SGdvrNW7I3GlAFS9hMGmk496pWzyNtymHb+X24vn3CmcPFN2K7jAu8Byv7pDm/3F+iQlUbLrjOuEsTwaUc/ehaqa4ACluJ/F2KhRjMgQVH3oTHYEJ8P/0Zl3RgcVIl Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: https://sashiko.dev/#/patchset/20260617053447.2831896-1-youngjun.park@lge.com?part=4 Regarding the review from Sachiko. The AI review pointed out two things. a pre-existing issue and a valid issue regarding swap_sync_discard(). For the pre-existing issue, I believe it is out of scope to address it together in this patchset. However, the second point is a valid issue. For the case where swap_sync_discard() discards a non-selected tier, succeeds, and then retries swap allocation. I will fix this in the next version by checking the memcg mask within swap_sync_discard().