[Skiboot] Fast reboot functionality

[Oliver]

On Thu, Sep 27, 2018 at 12:17 AM, Artem Senichev <artemsen at gmail.com> wrote:
> Hi all,
>
> I noticed that we have lost the the support of 'fast reboot' mode in
> our VESNIN P8 servers.
> Every reboot call from the host OS or petitboot console causes a full
> boot cycle started from Hostboot.
>
> OPAL says "Fast reboot timed out waiting for secondaries to call in".
>
> What's the reason for this behavior?

Sounds like a bug.

> How can I fix it?

Can you do a git bisect to find the commit that broke it? Given the
Vesnin is a four socket system the default timeout might not be long
enough to work reliably for you.

>
> Stripped log from OPAL:
> ...
> [  199.136112474,7] PHB62: Purging all IODA tables...
> [  199.142710249,5] OPAL: Reboot request...
> [  199.143130695,8] NVRAM: 'log-level-memory=9' (18)
> [  199.143244038,8] NVRAM: 'log-level-driver=9' (18)
> [  199.143310911,8] NVRAM: '' (0)
> [  199.143358210,7] NVRAM: 'fast-reset' not found
> [  199.143421327,5] RESET: Initiating fast reboot 1...
> [  199.143495092,7] RESET: Resetting from cpu: 0x8 (core 0x1)
> [  199.143574199,7] RESET Waking up core 0x1
> [  199.143631612,8] RESET: Special wakeup complete after 1 us
> [  199.143708792,7] RESET Waking up core 0x2
> [  199.143764927,8] RESET: Special wakeup complete after 1 us
> [  199.143846915,7] RESET Waking up core 0x4
> ...
> [  199.147926899,8] RESET: Special wakeup complete after 1 us
> [  199.148011989,7] RESET Waking up core 0xd
> [  199.148072961,8] RESET: Special wakeup complete after 1 us
> [  199.148151948,7] RESET: Stopping the world...
> [  199.148627664,7] RESET: Resetting all threads but self...
> [  199.148736943,7] RESET: CPU 0x000a reset in
> [  199.148737873,7] RESET: CPU 0x000b reset in
> [  199.148738889,7] RESET: CPU 0x000c reset in
> [  199.148741119,7] RESET: CPU 0x000d reset in
> ...
> [  199.149138628,7] RESET: CPU 0x0c6d reset in
> [  199.149139615,7] RESET: CPU 0x0c6e reset in
> [  199.149141154,7] RESET: CPU 0x0c6f reset in
> [  200.149141935,5] RESET: Fast reboot timed out waiting for
> secondaries to call in
> [  200.149398335,6] IPMI: sending chassis control request 0x03
> [  200.149630269,8] BT: seq 0x4a netfn 0x00 cmd 0x02: Message sent to host
> [  200.387151050,8] BT: seq 0x4a netfn 0x00 cmd 0x02: IPMI MSG done
> *end*
>
> Best regards,
> Artem Senichev
> Software Engineer, YADRO.
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