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# Date Author Comment
91977c2e 12/15/2011 01:40 pm Paolo Bonzini

block: qemu_aio_get does not return NULL

Initially done with the following semantic patch:

rule1
expression E;
statement S;
@@
E = qemu_aio_get (...);
(
- if (E == NULL) { ... } |
- if (E) { <... S ...> }
)

which however missed occurrences in linux-aio.c and posix-aio-compat.c....
b161e2e4 10/14/2011 11:29 am Kevin Wolf

linux-aio: Allow reads beyond the end of growable images

This is the linux-aio version of commits 22afa7b5 (raw-posix, synchronous) and
ba1d1afd (posix-aio-compat). Reads now produce zeros after the end of file
instead of failing or resulting in short reads, making linux-aio compatible...
449c184e 10/11/2011 10:41 am Kevin Wolf

linux-aio: Fix laio_submit error handling

The error handling order was in the wrong order, so that either the ACB would
be leaked or the counter would be decremented when it shouldn't.

Signed-off-by: Kevin Wolf <>
cf26a4e6 09/20/2011 03:34 pm Paolo Bonzini

linux-aio: remove process requests callback

Signed-off-by: Paolo Bonzini <>
Signed-off-by: Kevin Wolf <>
c30e624d 09/06/2011 12:23 pm Frediano Ziglio

linux aio: some comments

Add some notes about Linux AIO explaining why we don't use AIO in
some situations.

Signed-off-by: Frediano Ziglio <>
Signed-off-by: Kevin Wolf <>
7267c094 08/21/2011 07:01 am Anthony Liguori

Use glib memory allocation and free functions

qemu_malloc/qemu_free no longer exist after this commit.

Signed-off-by: Anthony Liguori <>
384acbf4 08/02/2011 04:53 pm Kevin Wolf

async: Remove AsyncContext

The purpose of AsyncContexts was to protect qcow and qcow2 against reentrancy
during an emulated bdrv_read/write (which includes a qemu_aio_wait() call and
can run AIO callbacks of different requests if it weren't for AsyncContexts)....
2be50649 04/23/2010 05:21 pm Stefan Hajnoczi

linux-aio: Fix typo in read() EINTR check

Signed-off-by: Stefan Hajnoczi <>
Signed-off-by: Kevin Wolf <>
8febfa26 10/27/2009 07:28 pm Kevin Wolf

Add qemu_aio_process_queue()

We'll leave some AIO completions unhandled when we can't call the callback.
qemu_aio_process_queue() is used later to run any callbacks that are left and
can be run then.

Signed-off-by: Kevin Wolf <>
Signed-off-by: Anthony Liguori <>
db0ffc24 10/27/2009 07:28 pm Kevin Wolf

linux-aio: Honour AsyncContext

Also for Linux AIO, don't call callbacks that don't belong to the active
AsyncContext.

Signed-off-by: Kevin Wolf <>
Signed-off-by: Anthony Liguori <>
5c6c3a6c 08/28/2009 04:30 am Christoph Hellwig

raw-posix: add Linux native AIO support

Now that do have a nicer interface to work against we can add Linux native
AIO support. It's an extremly thing layer just setting up an iocb for
the io_submit system call in the submission path, and registering an...