diff options
Diffstat (limited to 'java')
| -rw-r--r-- | java/com/redhat/et/libguestfs/GuestFS.java | 25 | ||||
| -rw-r--r-- | java/com_redhat_et_libguestfs_GuestFS.c | 16 |
2 files changed, 41 insertions, 0 deletions
diff --git a/java/com/redhat/et/libguestfs/GuestFS.java b/java/com/redhat/et/libguestfs/GuestFS.java index 515fc77b..c29789c0 100644 --- a/java/com/redhat/et/libguestfs/GuestFS.java +++ b/java/com/redhat/et/libguestfs/GuestFS.java @@ -2487,4 +2487,29 @@ public class GuestFS { private native void _mv (long g, String src, String dest) throws LibGuestFSException; + /** + * drop kernel page cache, dentries and inodes + * + * This instructs the guest kernel to drop its page cache, + * and/or dentries and inode caches. The parameter + * "whattodrop" tells the kernel what precisely to drop, + * see <http://linux-mm.org/Drop_Caches> + * + * Setting "whattodrop" to 3 should drop everything. + * + * This automatically calls sync(2) before the operation, + * so that the maximum guest memory is freed. + * + * @throws LibGuestFSException + */ + public void drop_caches (int whattodrop) + throws LibGuestFSException + { + if (g == 0) + throw new LibGuestFSException ("drop_caches: handle is closed"); + _drop_caches (g, whattodrop); + } + private native void _drop_caches (long g, int whattodrop) + throws LibGuestFSException; + } diff --git a/java/com_redhat_et_libguestfs_GuestFS.c b/java/com_redhat_et_libguestfs_GuestFS.c index 0f20d844..ae6ff863 100644 --- a/java/com_redhat_et_libguestfs_GuestFS.c +++ b/java/com_redhat_et_libguestfs_GuestFS.c @@ -2517,3 +2517,19 @@ Java_com_redhat_et_libguestfs_GuestFS__1mv } } +JNIEXPORT void JNICALL +Java_com_redhat_et_libguestfs_GuestFS__1drop_1caches + (JNIEnv *env, jobject obj, jlong jg, jint jwhattodrop) +{ + guestfs_h *g = (guestfs_h *) (long) jg; + int r; + int whattodrop; + + whattodrop = jwhattodrop; + r = guestfs_drop_caches (g, whattodrop); + if (r == -1) { + throw_exception (env, guestfs_last_error (g)); + return ; + } +} + |