From 0349d30afcf1d345c1b4f9090447a561c944c8e5 Mon Sep 17 00:00:00 2001 From: "Richard W.M. Jones" Date: Fri, 25 Apr 2025 15:24:43 +0100 Subject: [PATCH] daemon/fstrim.c: Issue sync_disks after fstrim Thanks: Eric Sandeen (cherry picked from commit e127edcafc95c75bf484bf2199eb746a392c58c0) --- daemon/fstrim.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/daemon/fstrim.c b/daemon/fstrim.c index f6869042..3928f8bb 100644 --- a/daemon/fstrim.c +++ b/daemon/fstrim.c @@ -116,5 +116,13 @@ do_fstrim (const char *path, if (verbose) fprintf (stderr, "%s\n", out); + /* Sync the disks again. In practice we always call fstrim + * expecting that afterwards the results are visible in the qemu + * devices backing the guest. Depending on the Linux filesystem, + * fstrim may issue asynch discard requests, so it's not necessarily + * true that everything has been written out before this point. + */ + sync_disks (); + return 0; }