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Sun, 11 Jan 2026 04:20:11 -0800 (PST) From: Vernon Yang X-Google-Original-From: Vernon Yang To: akpm@linux-foundation.org, david@kernel.org Cc: lorenzo.stoakes@oracle.com, ziy@nvidia.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Vernon Yang Subject: [PATCH mm-new v4 6/6] mm: khugepaged: set to next mm direct when mm has MMF_DISABLE_THP_COMPLETELY Date: Sun, 11 Jan 2026 20:19:09 +0800 Message-ID: <20260111121909.8410-7-yanglincheng@kylinos.cn> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260111121909.8410-1-yanglincheng@kylinos.cn> References: <20260111121909.8410-1-yanglincheng@kylinos.cn> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: CAE54140002 X-Rspamd-Server: rspam06 X-Stat-Signature: u8cppt1kozy9rw6j7d67y6nsci41otpo X-Rspam-User: X-HE-Tag: 1768134012-729150 X-HE-Meta: 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 eFcHC5W4 ilutDacRTUo+tJun+lT6bZMcwUopNxY0ZxsxYU8rX5DBx2gj8sg+jEsQJ4mvJf5FHpRGJAFozTyn89IbQQDuBF0f0EE38Qv6t9Z1hXx1gjDfzaOGaOuc1P6Lj/iJl0CpEOdFfvgui8dER2f6oCiBEUuDRXvVF/+ZY1z60DQrxsULWWPUO5roieSHXM8kaGp3qmiLCuM2mxPuCTSDHNV7quo3jI/scojc1wvMBm8+i3wZ4XJ+1f7zC/UwbpuRUUcq3BCuoE/k1KsR5ol3hdb/llqtr5DqHaD3O8bFYkHGcn/NA2tAYEmdajKnGD2C9rgOqNGUsLh+dDj3SayBU+X2CZHaJdBFmhHUfKrU0RvM9Puz1BXk= 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: When an mm with the MMF_DISABLE_THP_COMPLETELY flag is detected during scanning, directly set khugepaged_scan.mm_slot to the next mm_slot, reduce redundant operation. Without this patch, entering khugepaged_scan_mm_slot() next time, we will set khugepaged_scan.mm_slot to the next mm_slot. With this patch, we will directly set khugepaged_scan.mm_slot to the next mm_slot. Signed-off-by: Vernon Yang --- mm/khugepaged.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 8a7008760566..4c055d6c2717 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -2566,7 +2566,7 @@ static unsigned int khugepaged_scan_mm_slot(unsigned int pages, enum scan_result * Release the current mm_slot if this mm is about to die, or * if we scanned all vmas of this mm. */ - if (hpage_collapse_test_exit(mm) || !vma) { + if (hpage_collapse_test_exit_or_disable(mm) || !vma) { /* * Make sure that if mm_users is reaching zero while * khugepaged runs here, khugepaged_exit will find -- 2.51.0