Re: [announce] Spring 2017 release: s6 init fails with buildroot on MIPS

From: Eric Le Bihan <>
Date: Sat, 13 May 2017 18:13:00 +0200


On 17-05-11 13:42:31, Van Bemten, Lionel (Nokia - BE/Antwerp) wrote:
> Hello all,
> After upgrading to the below release of skarnet packages, my system
> is not booting anymore on MIPS. I am using buildroot and the s6-linux-init-skeleton
> provided there by Éric Le Bihan.

The master branch of upstream Buildroot currently contains the Fall 2016
skarnet release. I have not yet bumped to Spring 2017: as you may have
seen, the patch for build time detection of types needs be refreshed.

> The init usually stays blocked there:
> s6-rc: info: processing service fdholder: starting
> with the following processes running:
> 136 root s6-rc -v 3 -u change services-all
> 143 root s6-fdholderd -1 -i data/rules
> 146 root s6-ipcserverd -1 -- s6-ipcserver-access -v0 -E -l0 -i data/rules -- s6-sudod -t 2000 -- /usr/libexec/s6-rc-oneshot-run -l
> 173 root s6-svlisten1 -u -- /run/s6-rc/scandir/klogd-log s6-svc -u -- /run/s6-rc/scandir/klogd-log
> 183 root s6-ftrigrd
> 296 root s6-svlisten1 -U -- /run/s6-rc/scandir/fdholder s6-svc -u -- /run/s6-rc/scandir/fdholder
> 297 root s6-ftrigrd
> and I regularly see the following message, even though not consistently:
> s6-ftrigrd: fatal: unable to flush asyncout: Broken pipe
> When I build the very same system for x86 I do not see any issue, it is very stable, so I
> suspect a cross-compilation issue. Since buildroot patches skalibs in order to determine
> system capabilities through build-time asserts instead of runtime tests, it is possible that
> something goes wrong there. However I have adapted the patches to the new release,
> and so far I cannot identify any error in the detected system settings.

I do my cross-compilation tests using QEMU and I remember having this
kind of issue sometimes. I always blamed it on a race condition and a
slow QEMU emulation, without looking any futher.

> If anyone has any idea to help the investigation, it would be highly appreciated :).
> Maybe for example a hint on what could cause s6-ftrigrd to get a broken pipe ?

Would you care to share the Buildroot defconfig file you are using?

Best regards,

Received on Sat May 13 2017 - 16:13:00 UTC

This archive was generated by hypermail 2.3.0 : Sun May 09 2021 - 19:44:19 UTC