From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EDCAD3C3450; Thu, 12 Mar 2026 21:22:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773350556; cv=none; b=twTqtA9bliE1lVYynRK9cVlMH2crURnvdxs/1nUZMVTx85JSNJgNiH5XPBjAiT8AJMbEhTWWQ6kJkvBGl2IXCaxz/5JXy+ZcH6FplY6udlGuYSzLGGb96BYhJVGwV/+RajbMxmNm1NttpMOO0gOUSuHoBHEi/cToT+HXshcNZC0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773350556; c=relaxed/simple; bh=vXrfk40UtZbX0SqCHHqsOdP16LoMR78nLHdRm76+ZlE=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=cXlooCKOdjYzuuLD30L7vKsH11UT7D29NZGLqZS47nyHgyt4OFf56EzXP/GXJePVOCMVze7Durk0z3Ht2/LLMpsmqGBzOnEjG5an0fqmI6bwxrBBa59/Bak4k4Sjx8e+zTqmkiiKbnsVivufOlGJK7IYIO1uwBUpqWqn6pMwl34= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Mro02dO+; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Mro02dO+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B0807C4CEF7; Thu, 12 Mar 2026 21:22:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773350555; bh=vXrfk40UtZbX0SqCHHqsOdP16LoMR78nLHdRm76+ZlE=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=Mro02dO+YyFgDnaGXuPbgLN5GgvpSjomBgjxPOEDX8QhxT0RJ7M5QeY7EQTFblHwn +jQLoHj3heOq50guPlmWTSueQqnadlOF0cjmjDAJAeoZ0IwvheYmgnDA9AfZMPvK8A kLLNXq/lTRvjded7buEA4WfHzkiiksMRkdp37DEyve9lxrJtWc3YQ4GBaczagMg79u UJI21S55B02VO2qlDVdoypuBc7vsHK4YIZjDjvtmovRH2N1Ex3nEjvR7ZlKeEUXoiG OWeMTrLJKxZIWdaij9GFkwu0sovQMmaDh8ICqasn3ISfKMJqzY2KHFpZiUgxabqhXI vwvPREQtBRXOQ== Message-ID: Date: Thu, 12 Mar 2026 22:22:17 +0100 Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH mm-unstable v15 12/13] mm/khugepaged: run khugepaged for all orders To: Nico Pache , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org Cc: aarcange@redhat.com, akpm@linux-foundation.org, anshuman.khandual@arm.com, apopple@nvidia.com, baohua@kernel.org, baolin.wang@linux.alibaba.com, byungchul@sk.com, catalin.marinas@arm.com, cl@gentwo.org, corbet@lwn.net, dave.hansen@linux.intel.com, dev.jain@arm.com, gourry@gourry.net, hannes@cmpxchg.org, hughd@google.com, jack@suse.cz, jackmanb@google.com, jannh@google.com, jglisse@google.com, joshua.hahnjy@gmail.com, kas@kernel.org, lance.yang@linux.dev, Liam.Howlett@oracle.com, lorenzo.stoakes@oracle.com, mathieu.desnoyers@efficios.com, matthew.brost@intel.com, mhiramat@kernel.org, mhocko@suse.com, peterx@redhat.com, pfalcato@suse.de, rakie.kim@sk.com, raquini@redhat.com, rdunlap@infradead.org, richard.weiyang@gmail.com, rientjes@google.com, rostedt@goodmis.org, rppt@kernel.org, ryan.roberts@arm.com, shivankg@amd.com, sunnanyong@huawei.com, surenb@google.com, thomas.hellstrom@linux.intel.com, tiwai@suse.de, usamaarif642@gmail.com, vbabka@suse.cz, vishal.moola@gmail.com, wangkefeng.wang@huawei.com, will@kernel.org, willy@infradead.org, yang@os.amperecomputing.com, ying.huang@linux.alibaba.com, ziy@nvidia.com, zokeefe@google.com References: <20260226031741.230674-1-npache@redhat.com> <20260226032650.234386-1-npache@redhat.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 2/26/26 04:26, Nico Pache wrote: > From: Baolin Wang > > If any order (m)THP is enabled we should allow running khugepaged to > attempt scanning and collapsing mTHPs. In order for khugepaged to operate > when only mTHP sizes are specified in sysfs, we must modify the predicate > function that determines whether it ought to run to do so. > > This function is currently called hugepage_pmd_enabled(), this patch > renames it to hugepage_enabled() and updates the logic to check to > determine whether any valid orders may exist which would justify > khugepaged running. > > We must also update collapse_allowable_orders() to check all orders if > the vma is anonymous and the collapse is khugepaged. > > After this patch khugepaged mTHP collapse is fully enabled. > > Signed-off-by: Baolin Wang > Signed-off-by: Nico Pache > --- Nothing jumped at me Acked-by: David Hildenbrand (Arm) -- Cheers, David