Eric W. Biederman wrote:
Let me put this concrete proposal on the table.
The problem:
With the current set of crashkernel= options we are asking the
distribution installer to perform magic. Moving as much of this logic
into a normal init script for better maintenance is desirable.
My proposal:
Implement crashkernel=max which reserves as much memory as is
reasonable for a crash kernel, without seriously affecting stability,
performance, and reliability.
This is almost exactly what I want with crashkernel=auto....
So there's no big difference, except the name.
As an initial approximation I would use a 32nd of low memory.
Hmm, I think Bernhard's proposal is fine for this case, i.e. we can
introduce a new syntax, "crashkernel=>>X" which means we reserve 1/2^X
of system memory.
What do you think?
In addition implement:
/sys/kernel/crash_size
That can be written to (with enough privileges when no crash kernel is
loaded) reduce the amount of memory reserved by the crash kernel.
Yeah, this is nice!
Thanks.
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