IdleMaint: skip swap space, bind mounts, and virtual filesystems
When the idle maintenance task runs on Cuttlefish, there are several
warnings printed to logcat after the expected messages:
D vold : Starting trim of /data
I vold : Trimmed 0 bytes on /data in 36ms
D vold : Starting trim of /cache
I vold : Trimmed 58662912 bytes on /cache in 0ms
D vold : Starting trim of /metadata
I vold : Trimmed 7725056 bytes on /metadata in 12ms
D vold : Starting trim of none
W vold : Failed to open none: No such file or directory
D vold : Starting trim of /sdcard
W vold : Failed to open /sdcard: Not a directory
D vold : Starting trim of /mnt/vendor/shared
W vold : Trim failed on /mnt/vendor/shared: Inappropriate ioctl for device
This is because vold gathers the filesystems to trim from the fstab, but
it fails to exclude some entries that aren't appropriate to trim:
/dev/block/zram0 none swap defaults zramsize=75%
/tmp /sdcard none defaults,bind recoveryonly
shared /mnt/vendor/shared virtiofs nosuid,nodev,noatime nofail
These should be excluded because they are swap space, a bind mount, and
a virtual filesystem respectively.
Fix addFromFstab() to exclude the above cases.
Afterwards, the messages on Cuttlefish are:
D vold : Starting trim of /data
I vold : Trimmed 0 bytes on /data in 39ms
D vold : Starting trim of /cache
I vold : Trimmed 58662912 bytes on /cache in 0ms
D vold : Starting trim of /metadata
I vold : Trimmed 9822208 bytes on /metadata in 12ms
Change-Id: Idc575106fe6f81c737f684429d58dba4bd5478ad
1 file changed