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root / include / migration @ 36cd6f6f

Name Size
block.h 504 Bytes
migration.h 3.5 kB
page_cache.h 1.9 kB
qemu-file.h 6.5 kB
vmstate.h 34.4 kB

Latest revisions

# Date Author Comment
05fcc848 04/15/2013 09:26 am Kevin Wolf

savevm: Implement block_writev_buffer()

Instead of breaking up RAM state into many small chunks, pass the iovec
to the block layer for better performance.

Signed-off-by: Kevin Wolf <>
Signed-off-by: Stefan Hajnoczi <>
bd7f92e5 04/05/2013 06:17 pm Peter Maydell

vmstate: Add support for two dimensional arrays

Add support for migrating two dimensional arrays, by defining
a set of new macros VMSTATE_*_2DARRAY paralleling the existing
VMSTATE_*_ARRAY macros. 2D arrays are handled the same for actual
state serialization; the only difference is that the type check...
8070568b 04/05/2013 06:17 pm Igor Mitsyanko

vmstate.h: introduce VMSTATE_BUFFER_POINTER_UNSAFE macro

Macro could be used to migrate a dynamically allocated buffer of known size.

Signed-off-by: Igor Mitsyanko <>
Reviewed-by: Peter Maydell <>
Message-id: ...
f1c72795 03/26/2013 02:32 pm Peter Lieven

migration: do not sent zero pages in bulk stage

during bulk stage of ram migration if a page is a
zero page do not send it at all.
the memory at the destination reads as zero anyway.

even if there is an madvise with QEMU_MADV_DONTNEED
at the target upon receipt of a zero page I have observed...
d913829f 03/26/2013 02:32 pm Orit Wasserman

Add QemuFileWritevBuffer QemuFileOps

This will allow us to write an iovec

Signed-off-by: Orit Wasserman <>
Reviewed-by: Juan Quintela <>
Signed-off-by: Juan Quintela <>
6181ec24 03/26/2013 02:32 pm Orit Wasserman

Add qemu_put_buffer_async

This allows us to add a buffer to the iovec to send without copying it
into the static buffer, the buffer will be sent later when qemu_fflush is called.

Signed-off-by: Orit Wasserman <>
Signed-off-by: Juan Quintela <>
d58f5598 03/26/2013 02:30 pm David Gibson

savevm: Add VMSTATE_UINTTL_EQUAL helper

This adds an _EQUAL VMSTATE helper for target_ulongs, defined in terms of
VMSTATE_UINT32_EQUAL or VMSTATE_UINT64_EQUAL as appropriate.

Signed-off-by: David Gibson <>
Signed-off-by: Juan Quintela <>
213945e4 03/26/2013 02:30 pm David Gibson

savevm: Add VMSTATE_FLOAT64 helpers

The current savevm code includes VMSTATE helpers for a number of commonly
used data types, but not for the float64 type used by the internal floating
point emulation code. This patch fixes the deficiency.

Signed-off-by: David Gibson <>...
8474a9dd 03/26/2013 02:30 pm David Gibson

savevm: Add VMSTATE_STRUCT_VARRAY_POINTER_UINT32

Currently the savevm code contains a VMSTATE_STRUCT_VARRAY_POINTER_INT32
helper (a variably sized array with the number of elements in an int32_t),
but not VMSTATE_STRUCT_VARRAY_POINTER_UINT32 (... with the number of...
377e2cb9 03/26/2013 02:30 pm David Gibson

savevm: Fix bugs in the VMSTATE_VBUFFER_MULTIPLY definition

The VMSTATE_BUFFER_MULTIPLY macro is misnamed - it actually specifies
a variably sized buffer with VMS_VBUFFER, so should be named
VMSTATE_VBUFFER_MULTIPLY. This patch fixes this (the macro had no current...

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