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docs: Fix typo and update file in migration 

This patch fix some typo and update the file that already
moved.

Signed-off-by: Lei Li <lilei@linux.vnet.ibm.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Lei Li 2013-05-27 18:33:01 +08:00 committed by Michael Tokarev
parent cfeda5f4b8
commit 7465dfeca0
1 changed files with 9 additions and 8 deletions
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17
docs/migration.txt
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@ -41,7 +41,7 @@ All these four migration protocols use the same infrastructure to
save/restore state devices. This infrastructure is shared with the
savevm/loadvm functionality.
=== State Live Migration ==
=== State Live Migration ===
This is used for RAM and block devices. It is not yet ported to vmstate.
<Fill more information here>
@ -83,7 +83,7 @@ pointer that is passed to all functions.
The important functions for us are put_buffer()/get_buffer() that
allow to write/read a buffer into the QEMUFile.
=== How to save the state of one device ==
=== How to save the state of one device ===
The state of a device is saved using intermediate buffers. There are
some helper functions to assist this saving.
@ -97,7 +97,7 @@ associated with a series of fields saved. The save_state always saves
the state as the newer version. But load_state sometimes is able to
load state from an older version.
=== Legacy way ===
=== Legacy way ===
This way is going to disappear as soon as all current users are ported to VMSTATE.
@ -133,7 +133,7 @@ to interpret that definition to be able to load/save the state. As
the state is declared only once, it can't go out of sync in the
save/load functions.
An example (from hw/pckbd.c)
An example (from hw/input/pckbd.c)
static const VMStateDescription vmstate_kbd = {
.name = "pckbd",
@ -158,9 +158,9 @@ We registered this with:
Note: talk about how vmstate <-> qdev interact, and what the instance ids mean.
You can search for VMSTATE_* macros for lots of types used in QEMU in
hw/hw.h.
include/hw/hw.h.
=== More about versions ==
=== More about versions ===
You can see that there are several version fields:
@ -227,7 +227,7 @@ using a specific functionality, ....
It is impossible to create a way to make migration from any version to
any other version to work. But we can do better than only allowing
migration from older versions no newer ones. For that fields that are
migration from older versions to newer ones. For that fields that are
only needed sometimes, we add the idea of subsections. A subsection
is "like" a device vmstate, but with a particularity, it has a Boolean
function that tells if that values are needed to be sent or not. If
@ -247,7 +247,8 @@ static bool ide_drive_pio_state_needed(void *opaque)
{
IDEState *s = opaque;
return (s->status & DRQ_STAT) != 0;
return ((s->status & DRQ_STAT) != 0)
|| (s->bus->error_status & BM_STATUS_PIO_RETRY);
}
const VMStateDescription vmstate_ide_drive_pio_state = {