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Sun, 23 Aug 2026 15:49:43 -0400 (EDT) Date: Sun, 23 Aug 2026 20:49:42 +0100 From: Kiryl Shutsemau To: Mike Rapoport Cc: akpm@linux-foundation.org, david@kernel.org, ljs@kernel.org, nico.pache@linux.dev, baolin.wang@linux.alibaba.com, baohua@kernel.org, dev.jain@arm.com, hughd@google.com, lance.yang@linux.dev, liam@infradead.org, mhocko@suse.com, ryan.roberts@arm.com, shuah@kernel.org, surenb@google.com, usama.arif@linux.dev, vbabka@kernel.org, ziy@nvidia.com, usama.anjum@arm.com, agordeev@linux.ibm.com, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v4 05/19] selftests/mm: make the swap cases' swapout reliable Message-ID: References: <20260815015901.1236937-1-kirill@shutemov.name> <20260815015901.1236937-6-kirill@shutemov.name> <178721523516.2799959.17614116166980239496.b4-review@b4> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <178721523516.2799959.17614116166980239496.b4-review@b4> On Thu, Aug 20, 2026 at 11:40:35AM +0300, Mike Rapoport wrote: > > Ask again for up to two seconds, with the range held out of the daemon's > > reach while asking. The collapse each case runs next puts MADV_HUGEPAGE > > back, so only the setup is affected. > > "Retry several times for up to two seconds meanwhile holding the range > out of the khugepaged reach. The collapse each case runs next restores > MADV_NOHUGEPAGE, so only setup is affected" Small correction: it restores `MADV_HUGEPAGE` -- `wait_for_scan()` sets that before it waits. `MADV_NOHUGEPAGE` is what the setup puts down. Ack, for other input. -- Kiryl Shutsemau / Kirill A. Shutemov