From 2e9687c784cd19f6ac1c426d7578de65e55025c9 Mon Sep 17 00:00:00 2001

From: "Richard W.M. Jones" <rjones@redhat.com>

Date: Fri, 12 Aug 2016 10:34:54 +0100

Subject: [PATCH] v2v: Add -o discard option when fstrimming.

This *may* be required by some filesystems in order for fstrim to

work.  I'm not actually sure if this is true, but it's what

virt-sparsify --in-place does, and that utility has been tested a lot

more in regards to trimming.

(cherry picked from commit dd22e376c4ec8fd7c78c78f94c60bb763ddcf08f)

---

 v2v/v2v.ml | 5 ++++-

 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/v2v/v2v.ml b/v2v/v2v.ml

index 21f8d77..561317c 100644

--- a/v2v/v2v.ml

+++ b/v2v/v2v.ml

@@ -421,7 +421,10 @@ and do_fstrim g no_trim inspect =

   List.iter (

     fun dev ->

       g#umount_all ();

-      let mounted = try g#mount dev "/"; true with G.Error _ -> false in

+      let mounted =

+        try g#mount_options "discard" dev "/"; true

+        with G.Error _ -> false in

+

       if mounted then (

         try g#fstrim "/"

         with G.Error msg ->

-- 

2.7.4