base-files: flush kernel memory cache during sysupgrade

[openwrt/openwrt.git] / package / base-files / files / lib / upgrade / common.sh

diff --git a/package/base-files/files/lib/upgrade/common.sh b/package/base-files/files/lib/upgrade/common.sh
index a5c27dc2fbb63d9d5be8202f4ddc147a083b62dd..b44a5998f4e5fa77fbc56c0f0fd1edf4ac4a5787 100644 (file)
--- a/package/base-files/files/lib/upgrade/common.sh
+++ b/package/base-files/files/lib/upgrade/common.sh
@@ -297,6 +297,7 @@ indicate_upgrade() {
 # $(2): (optional) pipe command to extract firmware, e.g. dd bs=n skip=m
 default_do_upgrade() {
        sync
+       echo 3 > /proc/sys/vm/drop_caches
        if [ -n "$UPGRADE_BACKUP" ]; then
                get_image "$1" "$2" | mtd $MTD_ARGS $MTD_CONFIG_ARGS -j "$UPGRADE_BACKUP" write - "${PART_NAME:-image}"
        else