Messages in this thread | | | Date | Tue, 9 Sep 2014 13:49:41 +0200 | From | Pavel Machek <> | Subject | Re: 3.17-rc2: root=/dev/mmcblk0p2 command line parsing fails |
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Hi!
> > The problem is still there in 3.17-rc2. 3.16 does not have the > > problem. Messages are still similar: > > > > mmc0: new high speed SDHC card at address b368 > > mmcblk0: mmc0:b368 USD 7.45 GiB > > mmcblk0: p1 p2 p3 p4 > > VFS: Cannot open root device "mmcblk0p2" or unknown-block(0,0): error > > -6 > > Please append a correct "root=" boot option; here are the available > > partitions: > > b300 7822336 mmcblk0 driver: mmcblk > > b301 102400 mmcblk0p1 00082434-01 > > b302 1048576 mmcblk0p2 00082434-02 > > b303 1024 mmcblk0p3 00082434-03 > > b304 6086656 mmcblk0p4 00082434-04 > > Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) > > CPU: 0 PID: 1 Comm: swapper/0 Not tainted > > 3.17.0-rc2-00368-gec0400b-dirty #83 > > > > > > What is going on there? Clearly partition table was parsed and > > partitions are available; does the mention of unknown-block(0,0) mean > > that kernel failed to parse the command line? > > > > I replaced "root=/dev/mmcblk0p2" with "root=b302" and have a booting > > system. > > > Can you do a bisect? 3.17-rc2 booted fine for me today: > > EXT3-fs (mmcblk0p2): mounted filesystem with ordered data mode > VFS: Mounted root (ext3 filesystem) on device 179:2. > Freeing unused kernel memory: 252K (c052d000 - c056c000) > random: nonblocking pool is initialized
Bisect would be hard... and I believe the problem is somewhere in block layer now -- not socfpga-specific.
Best regards, Pavel
-- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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