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b=Mro02dO+YyFgDnaGXuPbgLN5GgvpSjomBgjxPOEDX8QhxT0RJ7M5QeY7EQTFblHwn +jQLoHj3heOq50guPlmWTSueQqnadlOF0cjmjDAJAeoZ0IwvheYmgnDA9AfZMPvK8A kLLNXq/lTRvjded7buEA4WfHzkiiksMRkdp37DEyve9lxrJtWc3YQ4GBaczagMg79u UJI21S55B02VO2qlDVdoypuBc7vsHK4YIZjDjvtmovRH2N1Ex3nEjvR7ZlKeEUXoiG OWeMTrLJKxZIWdaij9GFkwu0sovQMmaDh8ICqasn3ISfKMJqzY2KHFpZiUgxabqhXI vwvPREQtBRXOQ== Message-ID: Date: Thu, 12 Mar 2026 22:22:17 +0100 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 X-Rspamd-Queue-Id: 9B65940008 X-Stat-Signature: p5nxye46yayj8keaybkxwuo6pntuqq93 X-Rspam-User: X-Rspamd-Server: rspam05 X-HE-Tag: 1773350556-547780 X-HE-Meta: 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 0/pAkLZN NAgx0v36M7ntDjMY9FnUbfCcGIVeQbP4lotGqHsbek7WXKW29qEmVgTNVH/BJ3gdts87cXBFN9tnqtjdtW1hmaTygITJ6lGE/oboApEFLwbdy/Hc6LV/IgOaexZ6B6h9PLh3hWahCoG2x85a8yryFEHHTRBfNhQEJQ+DMnyJNXidwdYlIDqfz5Qf+EiCdMbk3a6DfDOGMZ6QxhvfGaNelDCP/JauJgL0f4ityBGef7WDiDHenpZBb93s4B/A78RP+GZJvhFBNLxaZ54irQ9AggMT2IQntUCYI3Vw5ECu583xxtIxPj29rr3xoxa+N7kLsEW3Bgk+7yUWIQgmNfylrHz5X4o2LDpgp1CFs96aRauEPOlg/l9DqFbDkTIj7tJuggM5HCkI3basJVo+xkCCg5UfG5Q== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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