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Jean-Yves Migeon wrote:
Christoph Egger wrote:
Well, I do not see anything suspicious in this assembly? I am perhaps
I identified the debug printf's that make it work. See attached diff.
Commenting out one of them or both results in *xenbus_create not being
called and produces a "Hotplug scripts not working" error.
A comparison of the assembler snippet in xenbus_probe_init:
Anyone seeing the impact ?
Question though: does it fix the bug (*xenbus_create not being called)
only by using these printf's, or replacing them with some
DELAY(whatever), __insn_barrier() or x86_lfence() has any effect?
__insn_barrier() and x86_mfence() have no effect at all on both printf's.
Both printf's can be replaced with DELAY(31), where 31 is the lowest
possible number. 30 and lower values don't work.
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