Bug 722803

Description of problem:
I have two disks with swap partitions. One is a very high speed solid state disk. The other is just a standard disk partition. If both are given the same priority the writes to them are interleaved resulting in both having the performance of the slower disk. This can be fixed by adding the "pri=X" mount option to the swap partition. This worked in the past but now that systemd seems to have taken over mounting the swap partitions this option seems to be ignored.

Semantics of the option can be found using "man swapon"

Version-Release number of selected component (if applicable):
systemd-26-8.fc15.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Add the "pri=X" option (where X is a number) to two different swap partitions. e.g.
/dev/sda2 swap swap defaults,pri=1 0 0                                                                                                         
/dev/sdb2 swap swap defaults,pri=2 0 0

2. On reboot run "cat /proc/swaps" and the priority is the last digit on each line.

Actual results:
Both swap partitions have a priority of 0 (the default and since they both have the same priority the partitions are interleaved)

Expected results:
/dev/sda2 has priority 1 and /dev/sdb2 has priority 2. My fast disk is used first and my slow disk only when the fast one runs out of space.

Additional info:
If i understand the systemd.swap man page correctly this can be worked around by creating a swap unit for the partition instead but if systemd reads swap partitions from fstab then it should really honor the mount options that go with it.