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b=cBMKeyWmFtWpau6jvr11dMaY3e3aYX4jzKH/+n1L2gFQyuLmSv6pojwA3moF4g11Q 6/wFvXQr+iwAzDSzRwAh2NYKTZ9JNvePA1Tnhvsj1vlfH4E4XIlUE/PPSByvLtPJlf WTLf1K+o5joquvDM49alwv7sD3GhwkuTivPCrSO4fcJdqLgcqWYTOrHVh3UR0XlT5l oi+ixDu7leIw91Dp6AV7KkxNWdpOjJr666PokXcD1u9ypGPkX2/kEWwmZZDNF80m91 DOfUO13f4gEmcA1FbHmOPzFEyuSvMREv8EM+sRMRm/2zTnSCkk572/wjXZcGv48+ye RtupIktQS4F9w== Message-ID: <78238103-3a7f-432c-b1df-bd14d7cf4bb1@kernel.org> Date: Thu, 15 Oct 2026 09:16:36 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3] mm: page_alloc: make defrag_mode retries follow the promoted order Content-Language: en-US To: Johannes Weiner , Kiryl Shutsemau Cc: Andrew Morton , David Hildenbrand , Harry Yoo , Usama Arif , Suren Baghdasaryan , Michal Hocko , Brendan Jackman , Zi Yan , Shakeel Butt , linux-mm@kvack.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@meta.com References: <20261009125503.126202-1-kas@kernel.org> <15a9e03e-c748-4e51-b8cc-583a3610c897@kernel.org> <20261012192834.6934ef85444dee4a60d6d876@linux-foundation.org> <20261014202936.GC371161@cmpxchg.org> From: "Vlastimil Babka (SUSE)" Autocrypt: addr=vbabka@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 5ECD9140006 X-Stat-Signature: notfi5owxuyiciiwk8s5e9889878pqob X-HE-Tag: 1792048601-617815 X-HE-Meta: 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 z0Jv4Lln 4xZ4vRsAYvVz81nrNzccqd8u6ziYnXR1tfuRQsPMAz4ZuyjKtJd4IasEOR4LObHT1kpN5chU5pVfXka9egI1fX5fSzixnvQxfIMOdcrjd7EyY6DVm4VCev+2EofW6DOO3lj8DToKZzsQMNXxrvDFPAAvmGJaPEWs6c0B6dkOePoZlnbWn1dw3Q4a52OUCyDZajouJFsf7R5KSkGB/8AJIQHo+pk7Fs7chGaQKwQe34Z3NkGhKGHmmaETdJ8Cf0vOBkkGBPvN8xIs09rZjxf/Sl9kEYYZPULNQH3h/vfE3wezmWrCINBicOlj27WmhFuaFnkAvLsB3ZxKnBt2A/7UtY+Eigs4NEnsbhGadGa504tDHq4M= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 10/14/26 22:29, Johannes Weiner wrote: > On Tue, Oct 13, 2026 at 06:37:20PM +0100, Kiryl Shutsemau wrote: >> @@ -4127,6 +4127,12 @@ __alloc_pages_may_oom(gfp_t gfp_mask, unsigned int order, >> return page; >> } >> >> +static inline bool order_nofrag_promoted(unsigned int order, >> + const struct alloc_context *ac) >> +{ >> + return ac->reclaim_compact_order != order; >> +} > > order_defrag_promoted? No strong preference. > Otherwise looks good to me! > Reviewed-by: Johannes Weiner > > And agree 7.4-rc1 with CC stable is fine. Sadly, not sure if anyone > but Meta is using the feature right now. I thought it was there for a long time but it was only added in 2025 :) At least the enterprise world is slow to adopt things, AFAICS.