7 Jul
2011
7 Jul
'11
6:52 p.m.
Dear Albert,
In message 4E15DCD4.7000608@aribaud.net you wrote:
The plan is to share the log buffer, in both directions: Linux can read the POST results, and U-Boot can read the last Linux messages after a crash / reboot. Actually, after a reboot you can read the last messages from the _previously_ running kernel in Linux, too (assuming there are no wraparounds, of course).
Even with wraparounds, you could still be able to read the last messages; only overwrites would prevent it.
Well, what I meant was: when the new kernel produces enough boot messages to cause a wrap-around of the log buffer, then all traces of the previous kernel's messages will be lost.
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
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