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imf22.hostedemail.com; dkim=none; dmarc=none; spf=pass (imf22.hostedemail.com: domain of regressions@leemhuis.info designates 80.237.130.52 as permitted sender) smtp.mailfrom=regressions@leemhuis.info ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1705765667; a=rsa-sha256; cv=none; b=Tyac0AAaWugmw2LBr+5q+tbgXXKKM0YkBsvpA6ggWLS9e4hKZ962kFRz2u7V0WomsFhrny wEhVlW4C5s47ix1EfMesUDViTgtwUdVNqWHpwY22+48eMUj+bBKPfgMEatXnaQX0McxUsP ghRUv2XrnH2wNjFzT/oJhZrMSgnYzRI= Received: from [2a02:8108:8980:2478:8cde:aa2c:f324:937e]; authenticated by wp530.webpack.hosteurope.de running ExIM with esmtpsa (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) id 1rRDZQ-0004DJ-V9; Sat, 20 Jan 2024 16:47:45 +0100 Message-ID: <836bec0b-16f9-4a18-9299-a3ae0783bf9a@leemhuis.info> Date: Sat, 20 Jan 2024 16:47:44 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: "Linux regression tracking #adding (Thorsten Leemhuis)" Subject: Re: [PATCH v2] mm: align larger anonymous mappings on THP boundaries Reply-To: Linux regressions mailing list , Linux regressions mailing list To: Linux kernel regressions list Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20220809142457.4751229f@imladris.surriel.com> Content-Language: en-US, de-DE In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-bounce-key: webpack.hosteurope.de;regressions@leemhuis.info;1705765667;5b990cef; X-HE-SMSGID: 1rRDZQ-0004DJ-V9 X-Rspam-User: X-Stat-Signature: 8m7j56u46wxsh55johkpi11s5p63hbq9 X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: F405CC0019 X-HE-Tag: 1705765666-807310 X-HE-Meta: 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 i3Yg6rOr 8cQvZ7AbaFYykmzbQ8nM7WNDa+AQOy0xBZ9fhOjWIjHrOnEnI+V3wDYa9k4ylTDyml313P1TQ9oXz8230j5NP949/hhYNrarxxmnXmVMPjngYsPtkrNQv9BxAvW6D0qZzMFfkUp8p7QLZlXpbqLsvgLGIBlbWczcRUm0Vsho7GEnpAChXtsR9xZxSMNFOxMKhqSitA8uJHCKH9iCtu3Addt+JCWtkmBBsKDTPyDSyiswZn7d45+NQJOImWe4w947E1gxR2GexQqFOeXmjafmWTPyX13B9in7eUzdipb9MCUiG/v7oaQ4bksTRMYDuU3P9pM0rRthykRiCFff20fl1FT77S7aYKj5t5JmwFhty74/6a5fXlS/D+7WjUbpxn3s3ZESsRSU+Xc+EY8lYNyrDRpweTWiCxBBQiB/y2/NjKbUvOelprgEqYpk5pA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 16.01.24 12:53, Jiri Slaby wrote: > On 09. 08. 22, 20:24, Rik van Riel wrote: >> Align larger anonymous memory mappings on THP boundaries by >> going through thp_get_unmapped_area if THPs are enabled for >> the current process. >> >> With this patch, larger anonymous mappings are now THP aligned. >> When a malloc library allocates a 2MB or larger arena, that >> arena can now be mapped with THPs right from the start, which >> can result in better TLB hit rates and execution time. > > This appears to break 32bit processes on x86_64 (at least). In > particular, 32bit kernel or firefox builds in our build system. > > Reverting this on top of 6.7 makes it work again. > > Downstream report: >  https://bugzilla.suse.com/show_bug.cgi?id=1218841 > [...] Trying this again, sorry for the noise: #regzbot ^introduced efa7df3e3bb5 #regzbot title mm: huge_memory: 32 bit systems or compat userspace broke #regzbot link: https://bugzilla.suse.com/show_bug.cgi?id=1218841 #regzbot fix: mm: huge_memory: don't force huge page alignment on 32 bit #regzbot ignore-activity Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat) -- Everything you wanna know about Linux kernel regression tracking: https://linux-regtracking.leemhuis.info/about/#tldr That page also explains what to do if mails like this annoy you.