scripts/setup: Check if hugepage files are used before removal

If DPDK was not told to unlink the hugepage backing files during the
hugepage_init, the application will keep them open while holding a
lock on each file. Check if said lock is held, if not, remove the
file.

Change-Id: I738a3d7756c335b63388a2efeb03debd734d9c9e
Signed-off-by: Michal Berger <michalx.berger@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/5065
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Karol Latecki <karol.latecki@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>

scripts/setup.sh

@@ -533,7 +533,9 @@ function reset_linux_pci() {
 function reset_linux() {
 	reset_linux_pci
 	for mount in $(linux_hugetlbfs_mounts); do
-		rm -f "$mount"/spdk*map_*
+		for hp in "$mount"/spdk*map_*; do
+			flock -n "$hp" true && rm -f "$hp"
+		done
 	done
 	rm -f /run/.spdk*
 }