add swap support for qemu

currently development hack. One needs to set VM_SWAPDEV=/dev/sdb on libata
kernels

diff --git a/build b/build
index 3fa7a3d..3a45ad1 100755 (executable)
--- a/build
+++ b/build
@@ -900,7 +900,9 @@ for SPECFILE in "${SPECFILES[@]}" ; do
        echo "CREATE_BASELIBS='$CREATE_BASELIBS'" >> $BUILD_ROOT/.build/build.data
        echo "REASON='${REASON//"'"/$Q}'" >> $BUILD_ROOT/.build/build.data
        echo "CHANGELOG='${CHANGELOG//"'"/$Q}'" >> $BUILD_ROOT/.build/build.data
-       test -n "$XENSWAP" && echo "XENSWAP='/dev/hda2'" >> $BUILD_ROOT/.build/build.data
+       # FIXME: this depends on the kernel and vm.
+       # could be hda2, sda2 for xen or hdb/sdb for qemu
+       test -n "$XENSWAP" && echo "XENSWAP='${VM_SWAPDEV:-/dev/hda2}'" >> $BUILD_ROOT/.build/build.data
        PERSONALITY_SYSCALL=
        PERSONALITY=0
        case `perl -V:archname` in
@@ -948,7 +950,13 @@ for SPECFILE in "${SPECFILES[@]}" ; do
                "$@"
        elif [ -n "$USE_QEMU" ]; then
                echo "booting QEMU ..."
-               set -- $qemu_bin -no-reboot -nographic -net none -kernel $qemu_kernel -initrd $qemu_initrd -append "root=/dev/sda panic=1 quiet rw console=ttyS0,115200 init=/.build/build" -serial stdio -hda $VM_IMAGE ${VM_MEMORY:+-m $VM_MEMORY}
+               set -- $qemu_bin -no-reboot -nographic -net none -serial stdio \
+                   -kernel $qemu_kernel \
+                   -initrd $qemu_initrd \
+                   -append "root=/dev/sda panic=1 quiet rw console=ttyS0,115200 init=/.build/build" \
+                   -hda $VM_IMAGE \
+                   ${VM_MEMORY:+-m $VM_MEMORY} \
+                   ${XENSWAP:+-hdb $XENSWAP}
                echo "$@"
                "$@"
        fi