On Sat, 27 Jul 2013, Rodolfo kix Garcia escribió:
> On Fri, 26 Jul 2013, Ben Hutchings escribió:
[...]
> Hi Ben,
>
> IMHO we should use the same resume device in all packages. I saw cryptsetup
> package is using their own method to get the resume device too. I will notify
> it to the cryptsetup team.
>
> I have some questions before start modify the uswsusp scripts and upload a
> new package for testing.
>
> 1. uswsusp will use the initramfs resume device. So, uswsusp should read the
> file included in the initrd image at "conf/conf.d/resume". Is ok?
>
> 2. If the user select the resume device using boot argument, what should the
> uswsusp script do?
>
> 3. resume will use the device using the argument "-r". This argument will be
> used in the uswsusp initrd script, using the file read in the initramfs
> resume file (question 1).
>
> 4. Currently, the initrd image includes two different resume binaries, one in
> /bin (I don't know who copies that binary. initramfs-tools?) and other in
> /sbin (copied by the uswsusp hook script. Sizes are different. We should use
> only one resume binary.
>
> kix@osaka:~/tmp$ find *bin -name resume -exec ls -l {} \;
> -rwxr-xr-x 1 kix kix 2792 jul 27 19:29 bin/resume
> -rwxr-xr-x 1 kix kix 40720 jul 27 19:29 sbin/resume
> kix@osaka:~/tmp$
>
> kix@osaka:~/tmp$ cat debian/initramfs-tools/hooks/uswsusp | grep copy
> copy_exec /usr/lib/uswsusp/resume /sbin
> kix@osaka:~/tmp$
>
> 5. There are two different resume scripts, one included by initramfs-tools
> and other by uswsusp. IMO we should use only one:
>
> kix@osaka:~/tmp/scripts/local-premount$ grep 'bin/resume' *
> resume: /bin/resume ${resume} ${resume_offset}
> resume: /bin/resume ${resume}
> uswsusp:[ -x /sbin/resume ] || exit 0;
> uswsusp:/sbin/resume
> kix@osaka:~/tmp/scripts/local-premount$
>
> 6. What file should read s2disk and s2both to find the resume device when
> they save the image?
>
> 7. The configuration file for uswsusp won't have the resume device. The line
> "resume device =" won't exist. So, if the user wants to override the resume
> device or select different swap device, what is the better choice? Include
> this change in the /etc/uswsusp.conf file? override it in the initramfs
> scripts? s2disk and s2both must know the override.
>
> 8. debian/control file: uswsusp will depends on initramfs-tools?
>
> 8a. I am not sure about this, because initramfs-tools is required by the
> kernel, but there are case that uswsusp doesn't depends on initramfs-tools
> and use the resume device in /etc/uswsusp.conf if initramfs-tools is not
> installed? Could be initramfs-tools not installed and uswsusp installed?
>
> I am not sure if I am missing something or if I am in the wrong way. Comments
> a very welcome.
>
> Cheers,
> kix
I was thinking about that and checking some things. The /bin/resume file is
used to boot the resume file created using the kernel (swsusp) and /sbin/resume
is used by suspend-utils (uswsusp). I don't know if we can join both methods,
using the same resume file.
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