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Received: from authenticated-user by stravinsky.debian.org with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.96) (envelope-from ) id 1wmFco-002QEZ-0E; Tue, 21 Jul 2026 18:55:30 +0000 Date: Tue, 21 Jul 2026 11:55:25 -0700 From: Breno Leitao To: Guillaume Morin Cc: osalvador@suse.de, avid@kernel.org, linux-mm@kvack.org, riel@surriel.com, Muchun Song Subject: Re: [BUG] mm/hugetlb: possible temporary resv underflow Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Debian-User: leitao X-Stat-Signature: o35otoitqbg38pbpdc8ijkx6kngdgapg X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 6147DA0003 X-Rspam-User: X-HE-Tag: 1784660137-365684 X-HE-Meta: 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 c2O1H8nt idwXNRB9O5LI0HxbClVqR0j+1Ix9qDYafZQzWvQRZBJEimOaw8UbV+N+RUnGpTqEuTvKU2Clhh3gDDjNQx32h+N+X99yUH2E403/JHQgMxGTqFUH/mw+56uEcplHF9MDo3C9vGouLjSaSqVbxViRwR7SW2vnEWRtoBGUfxCiN/qQzH4j5sPksOLEU8xFh3RMUUNEU6bIPNzfRMHxoF/SEoT64B1BR8AzRz4lBy5CUAxxBisQAjVMzM3PcimnzG2ktBxSoytLP/X/5wHQGL83hrp7cl2z3+iRHcfzrNRSHE+jkV5ER+CVP9uZYt46ETMyHwbbwZ9WGmcIqkkqo0WbATrGEhw== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Jul 21, 2026 at 11:04:15AM +0200, Guillaume Morin wrote: > On 15 Jul 9:15, Breno Leitao wrote: > > > > On Wed, Jul 15, 2026 at 03:58:39PM +0200, Guillaume Morin wrote: > > > Did you have the chance of looking at the selftest version of the repro? > > > Should I spin up a patch for this as well? > > > > I've skimmed over it, and it seems fine. please send it in a proper > > patch and I will review it. > > Will do once the fix is reviewed, no point in adding a selftest which > fails everytime I think but let me know if you feel otherwise > > I do not know if you had the chance to take a look at the patch: > https://lore.kernel.org/linux-mm/aleRuVBaWu6eTCJb@bender.morinfr.org/ Yes, I've looked at it today, and it seems correct, just a few nits. --breno