multipath: Write proper regex into multipath.conf

All multipath.conf blacklists are regexps, in fact.

References: bnc#883883
Signed-off-by: Petr Tesarik <ptesarik@suse.cz>
Make FilePath::listDir a const method

This method does not modify *this, so it can be also used on const
objects.

Signed-off-by: Petr Tesarik <ptesarik@suse.cz>
Take framebuffer size into account for "kdumptool calibrate"

Depending on the resolution, framebuffer(s) may considerably influence
kdump kernel requirements.

Note that there is no framebuffer on z/Series, so after reading sysfs
fails, the default size for s390(x) is zero.

Signed-off-by: Petr Tesarik <ptesarik@suse.cz>
Take constant-size slabs into account for "kdump calibrate"

Some slabs do not depend on available memory or system utilization.
Their size can be taken directly from the running kernel.

Note that the size of the ACPI slab cache may vary widely across
machines (e.g. mine has only a few hundred kilobytes, while another
one I saw had over 10 megabytes).

Signed-off-by: Petr Tesarik <ptesarik@suse.cz>