I noticed that debusine's autopkgtests are failing on loong64 (e.g. https://ci.debian.net/packages/d/debusine/testing/loong64/72375884/). On investigation, I found this in its test artifacts: Jun 22 10:47:53 ci-173-ef19176d nginx[8035]: 2026/06/22 10:47:53 [emerg] 8035#8035: could not build server_names_hash, you should increase server_names_hash_bucket_size: 32 Jun 22 10:47:53 ci-173-ef19176d nginx[8035]: nginx: configuration file /etc/nginx/nginx.conf test failed I suppose we could work around this in debusine, as suggested in https://nginx.org/en/docs/http/server_names.html#optimization. However, I think this message points to nginx being configured suboptimally on this architecture. The default value of server_names_hash_bucket_size is set to nginx's idea of the CPU cache line size. Looking at https://salsa.debian.org/nginx-team/nginx/-/blob/debian/latest/auto/os/conf, it seems that this is set based on matching the architecture name. No specific value is set for the case where $NGX_MACHINE is loongarch64, so it falls back to 32. I'm not an architecture expert, but looking at e.g. https://github.com/golang/go/blob/master/src/internal/cpu/cpu_loong64.go it seems as though 64 might be a better choice on this architecture. Could anyone on debian-loongarch@ confirm or contradict this? Thanks,
Hi, 在 2026/6/23 19:30, Colin Watson 写道: Your investigation is appreciate! affected Meltdown: Not affected Mmio stale data: Not affected Old microcode: Not affected Reg file data sampling: Not affected Retbleed: Not affected Spec rstack overflow: Not affected Spec store bypass: Not affected Spectre v1: Mitigation; __user pointer sanitization Spectre v2: Not affected Srbds: Not affected Tsa: Not affected Tsx async abort: Not affected Vmscape: Not affected root@klx:~# cat /sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size 64 I also confirm this through the Chinese Wechat group with staff in loongson company. Regards,
We believe that the bug you reported is fixed in the latest version of
nginx, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to 1140605@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Jan Mojžíš <janmojzis@debian.org> (supplier of updated nginx package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Wed, 24 Jun 2026 19:29:57 +0000
Source: nginx
Architecture: source
Version: 1.30.1-6
Distribution: unstable
Urgency: medium
Maintainer: Debian Nginx Maintainers <pkg-nginx-maintainers@alioth-lists.debian.net>
Changed-By: Jan Mojžíš <janmojzis@debian.org>
Closes: 1124757 1140361 1140605
Changes:
nginx (1.30.1-6) unstable; urgency=medium
.
* d/p/fix-cache-line-size-for-loongarch64.patch add,
backport loongarch64 detection and set cache line size 64
(Closes: 1140605)
* d/control: add `Suggests logrotate` for nginx-common (Closes: 1124757)
* d/changelog: fix the 1.30.1-5 entry, which already closed bug #1140361
(Closes: 1140361)
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I'm sorry for my last email, the "line break" is lost. I use KDE, Thunderbird to send email, when I copy and paste the output from Konsole, the "line break" is normal in Thunderbird editor when I see. But after I send out email, the "line break" is lost. 在 2026/6/24 14:24, xiao sheng wen(肖盛文) 写道: Your investigation is appreciate! Yes, 64 is a better choice on loong64 architecture. The following is run on my test loong64 machine: root@klx:~# arch loongarch64 root@klx:~# uname -a Linux klx 7.0.12+deb14-loong64 #1 SMP PREEMPT Debian 7.0.12-1 (2026-06-09) loongarch64 GNU/Linux root@klx:~# cat /sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size 64 I also confirm this through the Chinese Wechat group with staff in loongson company. Regards,