Harald Hoyer <har...@redhat.com> writes: > On 12.10.2015 05:02, Neil Brown wrote: >> >> If I have booted a kernel with md/raid built in (no modules) and >> I use dracut to build the initramfs for a different kernel which >> has the md code compiled as separate modules, then it does not include >> the required md modules in the initramfs. >> >> As a particular instance this happen when the root filesystem is on >> RAID0. The 'raid0.ko' module is not included and boot fails. >> >> https://bugzilla.opensuse.org/show_bug.cgi?id=935993 >> >> This only happens when 'host-only' is selected (which is the default for >> openSUSE). >> >> the modules.d/90mdraid/module-setup.sh code calls >> >> instmods =drivers/md >> >> instmods calls >> module_is_host_only "raid0" >> and this incorrectly fails. >> >> If raid0.ko didn't have any alias this would succeed, but it does. >> >> $ modinfo -F alias raid0 >> md-level-0 >> md-raid0 >> md-personality-2 > > Huh? Is the module not loaded?
No, because the running kernel has "md/raid built in (no modules)". Thanks, NeilBrown > >> >> However these aliases don't appear in any modalias file in /sys/devices, >> in /proc/crypto, or in /proc/modules. >> >> Maybe you could parse /proc/mdstat.. >> >> if [ -f /proc/mdstat ]; then >> while read _d _c _a _m _x; do >> if [ "$_c" = ':' -a "$_a" = 'active' ]; then >> host_modalias["md-$_m"]=1 >> fi >> done < /proc/mdstat >> fi >> >> but it all seems rather fragile. There are probably other modules that >> might miss out accidentally. dm? >> >> Do we really need the host_modalias stuff? >> >> Thanks, >> NeilBrown >>
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