Re: findfs in linuxrc

Hi KP

Am 30.12.2015 um 20:11 schrieb kp kirchdoerfer:
> Erich;
> 
..

> 
> Looking at the busybox documentation, it seems it does support handling of 
> LABEL and UUID.
>    
> We should give it a try.

I have built a initrd with findfs enabled in busybox and struggled for a
few hours with linuxrc (which is not that seamlessly written in this
aspect) to boot from a UUID specified partition.

 title LEAF Styx primary boot UUID
  root (hd0,1)
  kernel /linux1 \
  console=ttyS0,38400 \
  init=/linuxrc rw \
  usb_wait=3 \
  VERBOSE=1 \
  intel_idle.max_cstate=0 \
  processor.max_cstate=1 \
  root=/dev/ram0 \
  boot=UUID=C765-30E4:vfat \
  reboot=bios \
  zswap.enabled=1 \
  zswap_size=128M \
  initrd=initrd2.lrp \
  libata.force=1.00:pio4 \
  PKGPATH=UUID=C765-30E4:vfat \
  LEAFCFG=UUID=C765-30E4:vfat
  savedefault

initrd /initrd2.lrp

title LEAF Styx primary boot with label
  root (hd0,1)
  kernel /linux1 \
  console=ttyS0,38400 \
  init=/linuxrc rw \
  usb_wait=3 \
  VERBOSE=1 \
  intel_idle.max_cstate=0 \
  processor.max_cstate=1 \
  root=/dev/ram0 \
  boot=LABEL=PRIMARY:vfat \
  reboot=bios \
  zswap.enabled=1 \
  zswap_size=128M \
  initrd=initrd2.lrp \
  libata.force=1.00:pio4 \
  PKGPATH=LABEL=PRIMARY:vfat \
  LEAFCFG=LABEL=PRIMARY:vfat
  savedefault

initrd /initrd2.lrp

>>>>>>>>>>

SALT# blkid
/dev/zram0: UUID="341406ff-6ca6-4b89-bfc5-5c9020bb0cc6" TYPE="swap"
/dev/sda1: SEC_TYPE="msdos" UUID="C72F-3FC7" TYPE="vfat"
PARTUUID="d0302fd7-01"
/dev/sda2: SEC_TYPE="msdos" LABEL="PRIMARY" UUID="C765-30E4" TYPE="vfat"
PARTUUID="d0302fd7-02"
/dev/sda3: SEC_TYPE="msdos" LABEL="SECONDARY" UUID="C784-A612"
TYPE="vfat" PARTUUID="d0302fd7-03"
/dev/sda5: SEC_TYPE="msdos" UUID="C7A6-1054" TYPE="vfat"
PARTUUID="d0302fd7-05"

>>>>>>>>>>>>

I have successfully booted using either UUID and LABEL or the classical
/dev notation, which makes this initrd suitable for all our supported
type of partition identification. This initrd has been weeded out quite
a bit. It needs a kernel with compiled in storage drivers from previous
tests and it does not copy modules which reduces the memory footprint of
our system quite a bit.

We can safely remove findfs from hdsupp now.

I will push the corresponding branch to the repository before midnight :-)

cheers

ET



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