Checking for enough hibernation swap space at the daemon startup is not
sufficient, since both active memory as well as swap space change over time.
Now check whenever we receive a hibernate request or read the can-hibernate
property.
Commmit fc7c6e003 had a thinko, UP_DAEMON_WATERLINE specifies (active
memory)/(available swap), not the other way around. So replace it with 99%
instead.
Also update the documentation of up_backend_get_used_swap() to explain what the
returned percentage actually means.
Native Linux suspend-to-disk does not use compression, and needs 2 KB of page
meta information for each MB of active memory. So bump the previous waterline
of 80% of active memory to 100.2%. Add an extra .05% to prevent rounding errors.
This should make the prediction whether hibernate is going to work very
accurate. However, it might prevent hibernate for folks who use an alternative
userspace solution like uswsusp which do support compression.
http://lists.freedesktop.org/archives/devkit-devel/2010-July/000867.html
In linux backend, g_object_set was called with wrong
argument types for time-to-empty,time-to-full and percentage
properties. This patch uses explicit casts in the same way as freebsd
backend.
Signed-off-by: Mariusz Ceier <mceier@gmail.com>
pm-is-supported does all the work upower was duplicating, and it handles more
use cases than the old upower code did. No point in duplicating functionality.
Signed-off-by: Richard Hughes <richard@hughsie.com>
up_daemon_check_swap_space uses the Active: line from /proc/meminfo to
determine the amount of swap the system needs to be able to suspend. However,
because Active: includes both anonymous and file-backed pages, this greatly
overestimates the amount of swap needed. File-backed pages can be written back
to disk and so do not consume swap.
Instead, up_daemon_check_swap_space should use Active(anon): from /proc/meminfo
because only anonymous pages need to be written out to swap during a suspend.
Signed-off-by: Richard Hughes <richard@hughsie.com>
