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Fri, 02 Oct 2026 03:59:10 -0700 (PDT) Received: from gourry-fedora-PF4VCD3F ([2620:10d:c092:500::6:adcb]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48b38104d64sm4717627f8f.29.2026.10.02.03.59.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 02 Oct 2026 03:59:09 -0700 (PDT) Date: Fri, 2 Oct 2026 06:59:08 -0400 From: Gregory Price To: Brendan Jackman Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, kernel-team@meta.com, akpm@linux-foundation.org, vbabka@kernel.org, surenb@google.com, mhocko@suse.com, hannes@cmpxchg.org, ziy@nvidia.com, david@kernel.org, ljs@kernel.org, liam@infradead.org, rppt@kernel.org, baolin.wang@linux.alibaba.com, nico.pache@linux.dev, ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev, usama.arif@linux.dev, kas@kernel.org, matthew.brost@intel.com, joshua.hahnjy@gmail.com, rakie.kim@sk.com, byungchul@sk.com, ying.huang@linux.alibaba.com, apopple@nvidia.com Subject: Re: [PATCH] mm/page_alloc: let the bulk and folio allocators carry alloc_flags Message-ID: References: <20260914155115.439742-1-gourry@gourry.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 28C8D140008 X-Rspam-User: X-Stat-Signature: uaueyiujs6zrt3a15hn3eqqadqrck84s X-HE-Tag: 1790938751-233195 X-HE-Meta: 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 FMw7pXXU 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Oct 02, 2026 at 11:52:22AM +0100, Brendan Jackman wrote: > On Mon Sep 14, 2026 at 5:54 PM BST, Gregory Price wrote: > >> Brendan this will conflict mildly with your ALLOC_UNMAPPED work, > >> because you add an init_alloc_flags call in alloc_pages_bulk_noprof : > >> https://lore.kernel.org/linux-mm/20260726-page_alloc-unmapped-v3-20-6f5729aa9832@google.com/ > >> > >> I wanted to pull this out ahead to try to deal with the conflict. > >> > > > > Sashiko pointed out some issues that arise from rebasing on the recent > > ALLOC_NOLOCK work, and in a quick review I found a similar slow-path > > fallback issue with the NOBLOCK patch separate of this patch. > > > > Brendan, if you're alright with it, can I pull the NOBLOCK patch out > > ahead into a 2-commit series and I'll add the small fixups? > > Hey, sorry about the silence I let LKML pile up rather badly, it's been > quite a month.. > > Yes I am totally alright with this (glad to see you went ahead). See: https://lore.kernel.org/linux-mm/20260923211041.3127588-1-gourry@gourry.net/ for the RFC that pulls everything out ahead. I figured out how to make-do without it for the first go-around of private nodes, but it would still be needed (in some form) if mempolicy support makes its way into the private nodes series in the future - so i think we should still discuss it. ~Gregory