From: Liang Li <liang.z.li@intel.com> To: qemu-devel@nongnu.org Cc: kvm@vger.kernel.org, mst@redhat.com, lcapitulino@redhat.com, pbonzini@redhat.com, quintela@redhat.com, amit.shah@redhat.com, dgilbert@redhat.com, Liang Li <liang.z.li@intel.com> Subject: [QEMU 5/7] bitmap: Add a new bitmap_move function Date: Mon, 13 Jun 2016 18:16:47 +0800 [thread overview] Message-ID: <1465813009-21390-6-git-send-email-liang.z.li@intel.com> (raw) In-Reply-To: <1465813009-21390-1-git-send-email-liang.z.li@intel.com> Sometimes, it is need to move a portion of bitmap to another place in a large bitmap, if overlap happens, the bitmap_copy can't not work correctly, we need a new function to do this work. Signed-off-by: Liang Li <liang.z.li@intel.com> --- include/qemu/bitmap.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/include/qemu/bitmap.h b/include/qemu/bitmap.h index ec5146f..6ac89ca 100644 --- a/include/qemu/bitmap.h +++ b/include/qemu/bitmap.h @@ -37,6 +37,7 @@ * bitmap_set(dst, pos, nbits) Set specified bit area * bitmap_set_atomic(dst, pos, nbits) Set specified bit area with atomic ops * bitmap_clear(dst, pos, nbits) Clear specified bit area + * bitmap_move(dst, src, nbits) Move *src to *dst * bitmap_test_and_clear_atomic(dst, pos, nbits) Test and clear area * bitmap_find_next_zero_area(buf, len, pos, n, mask) Find bit free area */ @@ -136,6 +137,18 @@ static inline void bitmap_copy(unsigned long *dst, const unsigned long *src, } } +static inline void bitmap_move(unsigned long *dst, const unsigned long *src, + long nbits) +{ + if (small_nbits(nbits)) { + unsigned long tmp = *src; + *dst = tmp; + } else { + long len = BITS_TO_LONGS(nbits) * sizeof(unsigned long); + memmove(dst, src, len); + } +} + static inline int bitmap_and(unsigned long *dst, const unsigned long *src1, const unsigned long *src2, long nbits) { -- 1.9.1
WARNING: multiple messages have this Message-ID (diff)
From: Liang Li <liang.z.li@intel.com> To: qemu-devel@nongnu.org Cc: kvm@vger.kernel.org, mst@redhat.com, lcapitulino@redhat.com, pbonzini@redhat.com, quintela@redhat.com, amit.shah@redhat.com, dgilbert@redhat.com, Liang Li <liang.z.li@intel.com> Subject: [Qemu-devel] [QEMU 5/7] bitmap: Add a new bitmap_move function Date: Mon, 13 Jun 2016 18:16:47 +0800 [thread overview] Message-ID: <1465813009-21390-6-git-send-email-liang.z.li@intel.com> (raw) In-Reply-To: <1465813009-21390-1-git-send-email-liang.z.li@intel.com> Sometimes, it is need to move a portion of bitmap to another place in a large bitmap, if overlap happens, the bitmap_copy can't not work correctly, we need a new function to do this work. Signed-off-by: Liang Li <liang.z.li@intel.com> --- include/qemu/bitmap.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/include/qemu/bitmap.h b/include/qemu/bitmap.h index ec5146f..6ac89ca 100644 --- a/include/qemu/bitmap.h +++ b/include/qemu/bitmap.h @@ -37,6 +37,7 @@ * bitmap_set(dst, pos, nbits) Set specified bit area * bitmap_set_atomic(dst, pos, nbits) Set specified bit area with atomic ops * bitmap_clear(dst, pos, nbits) Clear specified bit area + * bitmap_move(dst, src, nbits) Move *src to *dst * bitmap_test_and_clear_atomic(dst, pos, nbits) Test and clear area * bitmap_find_next_zero_area(buf, len, pos, n, mask) Find bit free area */ @@ -136,6 +137,18 @@ static inline void bitmap_copy(unsigned long *dst, const unsigned long *src, } } +static inline void bitmap_move(unsigned long *dst, const unsigned long *src, + long nbits) +{ + if (small_nbits(nbits)) { + unsigned long tmp = *src; + *dst = tmp; + } else { + long len = BITS_TO_LONGS(nbits) * sizeof(unsigned long); + memmove(dst, src, len); + } +} + static inline int bitmap_and(unsigned long *dst, const unsigned long *src1, const unsigned long *src2, long nbits) { -- 1.9.1
next prev parent reply other threads:[~2016-06-13 10:23 UTC|newest] Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-06-13 10:16 [QEMU 0/7] Fast balloon and fast live migration Liang Li 2016-06-13 10:16 ` [Qemu-devel] " Liang Li 2016-06-13 10:16 ` [QEMU 1/7] balloon: speed up inflating & deflating process Liang Li 2016-06-13 10:16 ` [Qemu-devel] " Liang Li 2016-06-14 11:37 ` Thomas Huth 2016-06-14 11:37 ` [Qemu-devel] " Thomas Huth 2016-06-14 14:22 ` Li, Liang Z 2016-06-14 14:22 ` [Qemu-devel] " Li, Liang Z 2016-06-14 14:41 ` Li, Liang Z 2016-06-14 14:41 ` [Qemu-devel] " Li, Liang Z 2016-06-14 15:33 ` Thomas Huth 2016-06-14 15:33 ` [Qemu-devel] " Thomas Huth 2016-06-17 0:54 ` Li, Liang Z 2016-06-17 0:54 ` [Qemu-devel] " Li, Liang Z 2016-06-19 4:12 ` Michael S. Tsirkin 2016-06-19 4:12 ` [Qemu-devel] " Michael S. Tsirkin 2016-06-20 1:37 ` Li, Liang Z 2016-06-20 1:37 ` [Qemu-devel] " Li, Liang Z 2016-06-13 10:16 ` [QEMU 2/7] virtio-balloon: add drop cache support Liang Li 2016-06-13 10:16 ` [Qemu-devel] " Liang Li 2016-06-19 4:14 ` Michael S. Tsirkin 2016-06-19 4:14 ` [Qemu-devel] " Michael S. Tsirkin 2016-06-20 2:09 ` Li, Liang Z 2016-06-20 2:09 ` [Qemu-devel] " Li, Liang Z 2016-06-13 10:16 ` [QEMU 3/7] Add the hmp and qmp interface for dropping cache Liang Li 2016-06-13 10:16 ` [Qemu-devel] " Liang Li 2016-06-13 10:50 ` Daniel P. Berrange 2016-06-13 11:06 ` Daniel P. Berrange 2016-06-13 14:12 ` Li, Liang Z 2016-06-13 14:12 ` Li, Liang Z 2016-06-13 11:41 ` Paolo Bonzini 2016-06-13 14:14 ` Li, Liang Z 2016-06-13 14:14 ` Li, Liang Z 2016-06-13 13:50 ` Li, Liang Z 2016-06-13 13:50 ` Li, Liang Z 2016-06-13 15:09 ` Dr. David Alan Gilbert 2016-06-14 1:15 ` Li, Liang Z 2016-06-14 1:15 ` Li, Liang Z 2016-06-17 1:35 ` Li, Liang Z 2016-06-17 1:35 ` Li, Liang Z 2016-06-13 10:16 ` [QEMU 4/7] balloon: get free page info from guest Liang Li 2016-06-13 10:16 ` [Qemu-devel] " Liang Li 2016-06-19 4:24 ` Michael S. Tsirkin 2016-06-19 4:24 ` [Qemu-devel] " Michael S. Tsirkin 2016-06-20 2:48 ` Li, Liang Z 2016-06-20 2:48 ` [Qemu-devel] " Li, Liang Z 2016-06-13 10:16 ` Liang Li [this message] 2016-06-13 10:16 ` [Qemu-devel] [QEMU 5/7] bitmap: Add a new bitmap_move function Liang Li 2016-06-13 10:16 ` [QEMU 6/7] kvm: Add two new arch specific functions Liang Li 2016-06-13 10:16 ` [Qemu-devel] " Liang Li 2016-06-19 4:27 ` Michael S. Tsirkin 2016-06-19 4:27 ` [Qemu-devel] " Michael S. Tsirkin 2016-06-20 3:16 ` Li, Liang Z 2016-06-20 3:16 ` [Qemu-devel] " Li, Liang Z 2016-06-13 10:16 ` [QEMU 7/7] migration: skip free pages during live migration Liang Li 2016-06-13 10:16 ` [Qemu-devel] " Liang Li 2016-06-19 4:43 ` Michael S. Tsirkin 2016-06-19 4:43 ` [Qemu-devel] " Michael S. Tsirkin 2016-06-20 2:52 ` Li, Liang Z 2016-06-20 2:52 ` [Qemu-devel] " Li, Liang Z
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