tree b73e798121f3f04dcbd5ee10089ba5718811e3be
parent 4ea36e2d1a2453ab87bb120812261c870c4a6fc4
author Sergey Frolov <sfrolov@google.com> 1607575576 -0700
committer Commit Bot <commit-bot@chromium.org> 1607987741 +0000

cros_sdk: Make fstrim run in background

Chroot images created with --use-image take unnecessary space, since
deleting files inside of chroot doesn't automatically return space to
the OS. cros_sdk calls fstrim to return the unused space to the OS
when amount of wasted space exceeds 20 GiBs, however, fstrim call blocks
cros_sdk and may take a while.
This change makes fstrim run in background. Output of fstrim is lost,
as we don't wait for it to finish, and fstrim will keep running after
cros_sdk exits.

BUG=chromium:1093131
TEST=verified manually

Change-Id: I52189bdb72f70567924f4d4c17795793c9868c83
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/2585948
Tested-by: Sergey Frolov <sfrolov@google.com>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Sergey Frolov <sfrolov@google.com>