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b=ObqNUb3rKiS4yM6Gx8oWG4UUqxI61uIvOXGmQ5kWt6uCoyS6klGsYFAfIFeZjQK7Z WmodSxBw2K8Gc7zgtTpEDad5gKA+SXjpbSL8F36t3CGb2c9u4LYPinBOj4tluVSh8g cZNAV50PT6+QvQFvppbopy9lIinxs1Sq3vyZ2U62s7bmDVYWa6bHKnsrOO/pBVabK/ myCdflNoBM5deUNg0EcV2g+NndbsfDXCR/xJalleom0x3NppP8fBJXFETJ/msTOljp jV9gpvzRpQTmen093PZThK7Lmzd9W7rA1CFZAobft/EkWhvP1vxu2BOxJUvMb523HW 3bH9Z8rz1R7PQ== Date: Sat, 14 Nov 2026 17:31:57 +0000 From: "Lorenzo Stoakes (ARM)" To: shao.mingyin@zte.com.cn Cc: akpm@linux-foundation.org, david@kernel.org, linux-mm@kvack.org, virtualization@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH] mm/balloon: fix NR_BALLOON_PAGES accounting on migration failure Message-ID: References: <20261115004708909xx05JgB9nXnOCG0zL7h_K@zte.com.cn> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261115004708909xx05JgB9nXnOCG0zL7h_K@zte.com.cn> X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 747E640006 X-Spam-Status: No, score=-10.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-Stat-Signature: eody1qch1kepstjwchfm35crbatqcqma X-Rspam-User: X-HE-Tag: 1794677523-289776 X-HE-Meta: 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 uusSg65V bWX02B57fscOwKtIyn8UBQeGR5HkjaznMHuoyAr9dr2zVuu5I8/hc/Mo9ndqAZHb7lLzh36krUBNb54GAsRhRRFPFQq9ApTDPI/TIKFkiQvplRMNMt9Pbv2mPBnvxGYqiBKSSQ3W1xLCeftbbvOwVqwPKq9BulK/pskhakoQCpNBrkP64Vs+07Pd5W4iflyKeQL+B6H+lxQuW9m9qQT+dIXT0TjxE65YosheeX5NVObKCvFKm/3pxm8YsI7gaPaH28sZyCH6Ll7hrzQL8pCbQB8Gswtn1ZxOQKwEaJ1P+76zEWcKAYki2LyUrfliDFEEAb2Ms1dxMZNOp1MnVYm6iiDY2G+8TFqMD3g1J Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Sun, Nov 15, 2026 at 12:47:08AM +0800, shao.mingyin@zte.com.cn wrote: > From: Shao Mingyin > > mm/balloon: fix NR_BALLOON_PAGES accounting on migration failure > > A balloon driver's -ENOENT migration result means that the old page was > deflated but the replacement was not inflated. vmw_balloon returns this > when its deflate operation succeeds and the subsequent inflate fails. > > balloon_page_migrate() accounts the deflation and frees the old page, > but does not decrement NR_BALLOON_PAGES. Each such failure therefore > leaves one extra page in the per-node count, which also contributes to > the Balloon value in /proc/meminfo. > > Decrement the counter on the old page's node, matching normal dequeue > accounting. > > Fixes: 4d689474e1b2 ("balloon_compaction: update the NR_BALLOON_PAGES state") > Signed-off-by: Shao Mingyin NAK. this is generated by some AI slopper's script, spamming the kernel. The patches I looked at were wrong/broken, so no to anything from this person. They've sent 300 mails in under four weeks spanniing: ata, scsi, target, ufs, nvme/nvmet, ubifs, ublk, zloop, dm, md, mmc, virtio-blk, mfd, gpio, pwm, spi, PCI, ASoC, ACPI, net, vfs mount, block partitions, and now mm. and 17 series across 7 subsystems over the past 23 hours. We need a way to ban emails from people like this... -- Cheers, Lorenzo