On Wed, Apr 25, 2018 at 10:05:23PM +0200, François Valenduc wrote:
Le 24/04/18 à 22:25, Theodore Y. Ts'o a écrit :
On Tue, Apr 24, 2018 at 08:17:23PM +0200, François Valenduc wrote:
I am using gentoo and indeed, the crc32_generic module was not included in the initramfs by default. I have added it and now I can use the 4.14.36 kernel without having to revert this commit.
So Gentoo doesn't automatically figure out which modules are required based on module depndencies (e.g., from the modules.dep file)?
That seems like a... bug. If this is a problem which is widespread across distributions, then we might have many more users running into this when 4.17 and the latest stable kernels get rolled out.
- TedI think that gentoo take into account modules dependencies. For example, jbd2 is included automatically in the initramfs without having to specifially include via the modules_load file of the genkernel package:
grep jbd2 /usr/share/genkernel/arch/x86_64/modules_load zsh: exit 1 grep --colour=auto jbd2 /usr/share/genkernel/arch/x86_64/modules_load
and jbd2 is also specified as a dependency for ext4 in the modules.dep file:
grep jbd2 modules.dep kernel/fs/ext4/ext4.ko: kernel/fs/mbcache.ko kernel/fs/jbd2/jbd2.ko kernel/fs/jbd2/jbd2.ko:
but the crc32_generic module is not listed as a dependency for ext4:
grep crc32 modules.dep kernel/crypto/crc32c_generic.ko: kernel/drivers/md/persistent-data/dm-persistent-data.ko: kernel/lib/libcrc32c.ko kernel/drivers/md/dm-bufio.ko kernel/drivers/md/dm-mod.ko kernel/drivers/dax/dax.ko kernel/drivers/md/dm-thin-pool.ko: kernel/drivers/md/persistent-data/dm-persistent-data.ko kernel/lib/libcrc32c.ko kernel/drivers/md/dm-bio-prison.ko kernel/drivers/md/dm-bufio.ko kernel/drivers/md/dm-mod.ko kernel/drivers/dax/dax.ko kernel/lib/libcrc32c.ko:
So, would this be the cause of the problem ?
It's a dependancy of the core kernel, the random code, not ext4. What tool are you using for your initramfs, dracut or something else?
thanks,
greg k-h