Re: Linux 4.14.36

["François Valenduc" <francoisvalenduc@gmail.com>]

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.
>
>      	       	       	      	     	     - Ted
I 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 ?

François Valenduc