I can now explain one class of differences between the modules loaded
under -42 versus -44. I am using the compat-wireless package, a version
of which does not yet exist for the -44 kernel (or at least: I hadn't
installed it). The two ath9k-related modules which are not being loaded
under -44 but are being loaded under -42 come from the compat-wireless
package.

This still leaves me stumped as to why all of these filesystem-related
modules are being loaded. They consume rather a lot of memory so I guess
that (on this small embedded system) they might lead to certain kinds of
memory running out. I would be grateful for any hints on finding out why
these modules are being loaded. The only filesystem I'm using on this
box is ext2 (on a CompactFlash card, if that makes any difference).
Other than proc, sysfs, debugfs, securityfs, devtmpfs, devpts and tmpfs,
that is.

I guess the above story also holds true for the -43-based kernels you
have asked me to test. I sincerely hope that this does not completely
invalidate the tests I've been doing (and the kernel packages you've
been building etc).

Please advise.

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https://bugs.launchpad.net/bugs/1052861

Title:
  After upgrade to new kernel version, machine crashes after a few hours
  of uptime

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