Yeah looks like the minimum amount of ram required to complete the
writing of a dump in the case of a generic-image and default initrd is
roughly 109-110M with the 3.8 kernel (I just tested it).
My $.02 on this matter is that the default values should work for
default installs. Right now that is not the case even if they have
enough ram to complete a dump.
My guess is that 64M works for virtual images just fine, but it's not
enough for generic images. So perhaps we should make this value
dependent on virtual or generic being in the kernel name.
So how about something like the below patch. I haven't fully vetted it,
but want to see what people think.
--- 10_linux.orig 2013-12-11 14:33:00.384344265 -0600
+++ 10_linux 2013-12-11 15:13:42.485036921 -0600
@@ -73,7 +73,7 @@ done
# add crashkernel option if we have the required tools
if [ -x "/usr/bin/makedumpfile" ] && [ -x "/sbin/kexec" ]; then
- GRUB_CMDLINE_EXTRA="$GRUB_CMDLINE_EXTRA crashkernel=384M-2G:92M,2G-:128M"
+ CRASH="on"
fi
linux_entry ()
@@ -120,6 +120,14 @@ EOF
echo '$message'
EOF
fi
+ if [ "x${CRASH}" = "xon" ]; then
+ if [ "x${basename%%generic}" != "x${basename}" ]; then
+ args="$args crashkernel=384M-2G:110M,2G-:128M"
+ elif [ "${basename%%virtual}" != ${basename} ]; then
+ args="$args crashkernel=384M-2G:64M,2G-:128M"
+ fi
+ fi
+
if test -d /sys/firmware/efi && test -e "${linux}.efi.signed"; then
cat << EOF
linux ${rel_dirname}/${basename}.efi.signed
root=${linux_root_device_thisversion} ro ${args}
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https://bugs.launchpad.net/bugs/785394
Title:
Hard-coded crashkernel=... memory reservation in /etc/grub.d/10_linux
is insufficient
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