Hi Jason,
On 3/26/21 12:24 AM, Jason Wang wrote:
>
> 在 2021/3/26 下午1:44, Dongli Zhang 写道:
>> The virtio device/driver (e.g., vhost-scsi or vhost-net) may hang due to
>> the loss of doorbell kick, e.g.,
>>
>> https://urldefense.com/v3/__https://lists.gnu.org/archive/html/qemu-devel/2018-12/msg0171
On 26.03.21 16:17, Eric Blake wrote:
On 3/26/21 9:55 AM, Max Reitz wrote:
Three test cases:
(1) Adding a qcow2 (metadata) file to an existing data file, see whether
we can read the existing data through the qcow2 image.
(2) Append data to the data file, grow the qcow2 image accordingly, see
We have a bug in qcow2: assume we've started data write into host
cluster A. s->lock is unlocked. During the write the refcount of
cluster A may become zero, cluster may be reallocated for other needs,
and our in-flight write become a use-after-free.
To fix the bug let's do the following. Or bette
Here refcount of cluster at @cluster_offset reached 0, so we "free"
that cluster. Not a cluster at @offset. The thing that save us from the
bug is that L2 tables and refblocks are discarded one by one. Still,
let's be precise.
Signed-off-by: Vladimir Sementsov-Ogievskiy
---
block/qcow2-refcount.
Simple test:
- start writing to allocated cluster A
- discard this cluster
- write to another unallocated cluster B (it's allocated in same place
where A was allocated)
- continue writing to A
For now last action pollutes cluster B which is a bug fixed by the
following commit.
For now, add
Finally, after all the preparations, when we have the whole
infrastructure of inflight-write-counters prepared in previous commits,
let's fix the following bug:
1. Start write to qcow2. Assume guest cluster G and corresponding host
cluster is H.
2. The write requests come to the point of data
We are going to change the concept of "free host cluster", so let's
clarify it now and add a helper, which we will modify later.
Signed-off-by: Vladimir Sementsov-Ogievskiy
---
block/qcow2-refcount.c | 31 +--
1 file changed, 25 insertions(+), 6 deletions(-)
diff --g
Hi all!
It's an alternative lock-less solution to
[PATCH v4 0/3] qcow2: fix parallel rewrite and discard (rw-lock)
It's an updated version of what was don in
[PATCH v3 0/6] qcow2: compressed write cache
I've split the logic into several patches, add a lot more comments and
documentation, I h
On Fri, Mar 26, 2021 at 3:21 AM ChangLimin wrote:
> >On Thu, Mar 25, 2021 at 8:07 AM ChangLimin
> wrote:
> >>On Wed, Mar 24, 2021 at 4:52 PM Max Reitz wrote:
> >>On 22.03.21 10:25, ChangLimin wrote:
> >>> For Linux 5.10/5.11, qemu write zeros to a multipath device using
> >>> ioctl(fd, BLKZEROO
We have a bug in qcow2: assume we've started data write into host
cluster A. s->lock is unlocked. During the write the refcount of
cluster A may become zero, cluster may be reallocated for other needs,
and our in-flight write become a use-after-free. More details will be
in the further commit which
On 3/26/21 9:55 AM, Max Reitz wrote:
> Setting the qcow2 data-file-raw bit means that you can ignore the
> qcow2 metadata when reading from the external data file. It does not
> mean that you have to ignore it, though. Therefore, the data read must
> be the same regardless of whether you interpre
On 3/26/21 9:55 AM, Max Reitz wrote:
> Three test cases:
> (1) Adding a qcow2 (metadata) file to an existing data file, see whether
> we can read the existing data through the qcow2 image.
> (2) Append data to the data file, grow the qcow2 image accordingly, see
> whether we can read the ne
On 26.03.21 15:23, Paolo Bonzini wrote:
Right now there is no easy way for "check" to print a reproducer command.
Because such a reproducer command line would be huge, we can instead teach
check to start a command of our choice. This can be for example a Python
unit test with arguments to only r
v1: https://lists.nongnu.org/archive/html/qemu-block/2020-06/msg00992.html
Hi,
I think that qcow2 images with data-file-raw should always have
preallocated 1:1 L1/L2 tables, so that the image always looks the same
whether you respect or ignore the qcow2 metadata. The easiest way to
achieve that
Setting the qcow2 data-file-raw bit means that you can ignore the
qcow2 metadata when reading from the external data file. It does not
mean that you have to ignore it, though. Therefore, the data read must
be the same regardless of whether you interpret the metadata or whether
you ignore it, and
Three test cases:
(1) Adding a qcow2 (metadata) file to an existing data file, see whether
we can read the existing data through the qcow2 image.
(2) Append data to the data file, grow the qcow2 image accordingly, see
whether we can read the new data through the qcow2 image.
(3) At runtime,
26.03.2021 16:47, Max Reitz wrote:
On 26.03.21 12:48, Vladimir Sementsov-Ogievskiy wrote:
10.03.2021 18:59, Max Reitz wrote:
When rebuilding the refcount structures (when qemu-img check -r found
errors with refcount = 0, but reference count > 0), the new refcount
table defaults to being put at
Instead of buffering the test output into a StringIO, patch it on
the fly by wrapping sys.stdout's write method. This can be
done unconditionally, even if using -d, which makes execute_unittest
a bit simpler.
Signed-off-by: Paolo Bonzini
Reviewed-by: Vladimir Sementsov-Ogievskiy
Tested-by: Eman
Python test scripts that use unittest consist of multiple tests.
unittest.main allows selecting which tests to run, but currently this
is not possible because the iotests wrapper ignores sys.argv.
unittest.main command line options also allow the user to pick the
desired options for verbosity, fai
In the next patch, "check" will learn how to execute a test script without
going through TestRunner. To enable this, keep only the text output
and subprocess handling in the TestRunner; move into TestEnv the logic
to prepare for running a subprocess.
Reviewed-by: Vladimir Sementsov-Ogievskiy
Sig
Due to a typo, in this case the SOCK_DIR was not being created.
Reviewed-by: Vladimir Sementsov-Ogievskiy
Signed-off-by: Paolo Bonzini
Tested-by: Emanuele Giuseppe Esposito
Message-Id: <20210323181928.311862-6-pbonz...@redhat.com>
---
tests/qemu-iotests/testenv.py | 2 +-
1 file changed, 1 ins
Right now there is no easy way for "check" to print a reproducer command.
Because such a reproducer command line would be huge, we can instead teach
check to start a command of our choice. This can be for example a Python
unit test with arguments to only run a specific subtest.
Move the trailing
This series adds a few usability improvements to qemu-iotests, in
particular:
- arguments can be passed to Python unittests scripts, for example
to run only a subset of the test cases (patches 1-2)
- it is possible to do "./check -- ../../../tests/qemu-iotests/055 args..."
and specify arbitra
On 3/26/21 9:14 AM, Max Reitz wrote:
> 15ce94a68ca ("block/qed: bdrv_qed_do_open: deal with errp") has improved
> the qed driver's error reporting, though sadly did not add a test for
> it.
> The good news are: There already is such a test, namely 116.
> The bad news are: Its reference output was n
15ce94a68ca ("block/qed: bdrv_qed_do_open: deal with errp") has improved
the qed driver's error reporting, though sadly did not add a test for
it.
The good news are: There already is such a test, namely 116.
The bad news are: Its reference output was not adjusted, and so now it
fails.
Let's fix th
On 26.03.21 12:48, Vladimir Sementsov-Ogievskiy wrote:
10.03.2021 18:59, Max Reitz wrote:
When rebuilding the refcount structures (when qemu-img check -r found
errors with refcount = 0, but reference count > 0), the new refcount
table defaults to being put at the image file end[1]. There is no
On 23.03.21 19:19, Paolo Bonzini wrote:
This series adds a few usability improvements to qemu-iotests, in
particular:
- arguments can be passed to Python unittests scripts, for example
to run only a subset of the test cases (patches 1-2)
- it is possible to do "./check -- ../../../tests/qemu
10.03.2021 18:59, Max Reitz wrote:
When rebuilding the refcount structures (when qemu-img check -r found
errors with refcount = 0, but reference count > 0), the new refcount
table defaults to being put at the image file end[1]. There is no good
reason for that except that it means we will not ha
On Wed, 24 Mar 2021 at 14:52, Stefan Hajnoczi wrote:
>
> The following changes since commit 67c1115edd98f388ca89dd38322ea3fadf034523:
>
> Merge remote-tracking branch 'remotes/kraxel/tags/ui-20210323-pull-request'
> into staging (2021-03-23 23:47:30 +)
>
> are available in the Git repositor
On Wed, Mar 17, 2021 at 11:35:31AM +0300, Vladimir Sementsov-Ogievskiy wrote:
> 15.03.2021 09:06, Roman Kagan wrote:
> > The reconnection logic doesn't need to stop while in a drained section.
> > Moreover it has to be active during the drained section, as the requests
> > that were caught in-fligh
On Tue, Mar 16, 2021 at 09:37:13PM +0300, Vladimir Sementsov-Ogievskiy wrote:
> 16.03.2021 19:08, Roman Kagan wrote:
> > On Mon, Mar 15, 2021 at 11:15:44PM +0300, Vladimir Sementsov-Ogievskiy
> > wrote:
> > > 15.03.2021 09:06, Roman Kagan wrote:
> > > > As the reconnect logic no longer interferes
在 2021/3/26 下午1:44, Dongli Zhang 写道:
The virtio device/driver (e.g., vhost-scsi or vhost-net) may hang due to
the loss of doorbell kick, e.g.,
https://lists.gnu.org/archive/html/qemu-devel/2018-12/msg01711.html
... or due to the loss of IRQ, e.g., as fixed by linux kernel commit
fe200ae48ef5
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