[PATCH V2] mkfs: Improve warning when AG size is a multiple of stripe width

[cem@kernel.org]

From: Carlos Maiolino <cmaiolino@redhat.com>

The current output message prints out a suggestion of an AG size to be
used in lieu of the user-defined one.
The problem is this suggestion is printed in filesystem blocks, without
specifying the suffix to be used.

This patch tries to make user's life easier by outputing the option as
it should be used by the mkfs, so users can just copy/paste it.

Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
---

V2:
	- Keep printing it in FSBs, just add the agsize= and the 'b' suffix at
	  the end

 mkfs/xfs_mkfs.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mkfs/xfs_mkfs.c b/mkfs/xfs_mkfs.c
index d3a15cf44..b61934e57 100644
--- a/mkfs/xfs_mkfs.c
+++ b/mkfs/xfs_mkfs.c
@@ -3179,9 +3179,9 @@ _("agsize rounded to %lld, sunit = %d\n"),
 		if (cli_opt_set(&dopts, D_AGCOUNT) ||
 		    cli_opt_set(&dopts, D_AGSIZE)) {
 			printf(_(
-"Warning: AG size is a multiple of stripe width.  This can cause performance\n\
-problems by aligning all AGs on the same disk.  To avoid this, run mkfs with\n\
-an AG size that is one stripe unit smaller or larger, for example %llu.\n"),
+"Warning: AG size is a multiple of stripe width. This can cause performance\n\
+problems by aligning all AGs on the same disk. To avoid this, run mkfs with\n\
+an AG size that is one stripe unit smaller or larger, for example: agsize=%llub\n"),
 				(unsigned long long)cfg->agsize - dsunit);
 			fflush(stdout);
 			goto validate;
-- 
2.39.2