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Fri, 21 Nov 2025 15:22:47 +0000 (UTC) Received: from bfoster.redhat.com (unknown [10.22.64.29]) by mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 00866180049F; Fri, 21 Nov 2025 15:22:46 +0000 (UTC) From: Brian Foster To: linux-mm@kvack.org Cc: Hugh Dickins , Baolin Wang Subject: [PATCH v3 0/3] tmpfs: zero post-eof ranges on file extension Date: Fri, 21 Nov 2025 10:22:43 -0500 Message-ID: <20251121152246.1023918-1-bfoster@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: pWBhoZMx2x2nI3suCSubBO7PlTrmWvJvTieiIy7ppag_1763738568 X-Mimecast-Originator: redhat.com Content-Type: text/plain Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 6937680002 X-Stat-Signature: rgs3axmo6bwpz81cfm7eh9os57s1f6rm X-HE-Tag: 1763738573-237821 X-HE-Meta: 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 iHviQ9k5 O3jok2gOBkJGiE2VlG2xAPfxhh72kQmDMhktpD+CuShcNfvgH2QS/XIg0HbdPGpCtKdbKoLaVubi7DndIZbuS/wQ2TBCQLS92SfVdEZ2F1NDZXRiYiHd2nDA06Sl+CUFmPuzp4Gm/Lvp8eeWJC7DBMXOWu3m1cEdQThNgpi6N76nUDD/is/BOwVZJv5N5oM8b2PFMqbi4iXlypiv9Ep81WxWFDsm23Dza5URCIc+vrmIRm5Ixe9MyP6m/or2MJAvepw2hXkefvs0nRNI8/oiOoKb7ngjcm5UIPeJUWI77/+q4ayvv8e5xA6jN5VsdRKG4k+nwVyAnVcFcgXe1ddi1sVL/hZGk6ANAGbloROTbTrxHX+YEZyy0kUtDNQo9TcIruOM1LzYmi/cFi14= 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: Hi all, Apologies for the quicker than expected respin here, but during discussion with Baolin on v2 it became apparent that I factored the first two patches in an unnecessarily confusing way, and I wanted to get that resolved more quickly. Otherwise there are a few smaller changes here that I think are incremental improvements. Baolin, I left off the R-b tag from v2 just out of caution and how I reworked the first two patches. The end result is mostly similar, but I'd appreciate a quick look before adding that back. Otherwise most of the functionality here should be the same as v2. Thoughts, reviews, flames appreciated. Brian v3: - Reorder changes in patches 1-2 to factor out existing logic first. - Use local scope variable in shmem_writeout() fallocend block. - Tweak combined zeroing logic in shmem_writeout(). - Clean up commit logs. v2: https://lore.kernel.org/linux-mm/20251112162522.412295-1-bfoster@redhat.com/ - Rework to zero uptodate post-eof folios on writeout and full range from EOF on size extension. - Misc. cleanups: variable renames (pos -> end), code relocation, comment cleanups/removal. - Update commit log to call out POSIX requirement. v1: https://lore.kernel.org/linux-mm/20250625184930.269727-1-bfoster@redhat.com/ Brian Foster (3): tmpfs: factor out folio zeroing logic at writeout time tmpfs: zero post-eof folio ranges on swapout tmpfs: zero post-eof ranges on file extension mm/shmem.c | 135 ++++++++++++++++++++++++++++++++++++++++++++--------- 1 file changed, 114 insertions(+), 21 deletions(-) -- 2.51.1