* [PATCH 0/3] kdump: crashkernel parameter improvement
@ 2017-10-24 5:31 dyoung
0 siblings, 0 replies; only message in thread
From: dyoung @ 2017-10-24 5:31 UTC (permalink / raw)
To: kexec, linux-kernel; +Cc: akpm, bhe, vgoyal, yinghai, corbet, dyoung
Hi,
Here is a try to improve current crashkernel kernel parameter
Patch 1/3 adds an extra functionality so that one can use like
crashkernel=2G-:128M^12 to reserve 128M for 2G+ machine but also scale the
size based on system memory, that means 128M + (total_mem - 128M) >> 12
Patch 2/3 is a resending of previous post to let crashkernel=xM to reserve
first from below 896M, then <4G, then <MAXMEM
Patch 3/3 round up total system memory size because according to test the
mem size from memblock api is usually smaller than actual size, this passed
my tests on x86/arm/powerpc, it should work for most cases, but there might
be exceptions, appreciated for any better idea.
Thanks
Dave
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