Eric Blake writes:
> Qemu's attempts to learn whether a destination file starts life with
QEMU (multiple times).
> all zero contents are just a hueristic. There may be cases where the
heuristic
> caller is aware of information that qemu cannot learn quickly, in
> which case telling qemu what
On 4/11/2025 3:28 PM, Alex Williamson wrote:
On Thu, 10 Apr 2025 09:07:51 -0700
Farhan Ali wrote:
On 4/3/2025 2:24 PM, Alex Williamson wrote:
On Thu, 3 Apr 2025 13:33:17 -0700
Farhan Ali wrote:
On 4/3/2025 11:05 AM, Alex Williamson wrote:
On Thu, 3 Apr 2025 10:33:52 -0700
Farhan Ali
On Thu, 10 Apr 2025 09:07:51 -0700
Farhan Ali wrote:
> On 4/3/2025 2:24 PM, Alex Williamson wrote:
> > On Thu, 3 Apr 2025 13:33:17 -0700
> > Farhan Ali wrote:
> >
> >> On 4/3/2025 11:05 AM, Alex Williamson wrote:
> >>> On Thu, 3 Apr 2025 10:33:52 -0700
> >>> Farhan Ali wrote:
> >>>
> >
On Thu, Apr 10, 2025 at 08:04:50PM -0500, Eric Blake wrote:
> When mirroring images, it makes sense for the destination to be sparse
> even if it was not connected with "discard":"unmap"; the only time the
> destination should be fully allocated is if the user pre-allocated it,
> or if the source w
On 11.04.25 04:04, Eric Blake wrote:
When doing a sync=full mirroring, QMP drive-mirror requests full
zeroing if it did not just create the destination, and blockdev-mirror
requests full zeroing unconditionally. This is because during a full
sync, we must ensure that the portions of the disk tha
On Fri, Sep 13, 2024 at 07:39:35PM +0300, Andrey Drobyshev wrote:
> Move the definition from iotests/250 to common.rc. This is used to
> detect real disk usage of sparse files. In particular, we want to use
> it for checking subclusters-based discards.
>
> Signed-off-by: Andrey Drobyshev
> Revi
Hi Paolo,
> > Emscripten's fiber does not support submitting coroutines to other
> > threads.
>
> Does it work as long as the thread does not rewind?
The structure used by Fiber includes a thread-specific field related to
rewind [1], which prevents it from being shared across threads. The behavio
On Fri, Apr 11, 2025 at 10:18:55AM +0200, Hanna Czenczek wrote:
> > if (ret && ret != -ENOTSUP) {
> > -goto out;
> > +if (ret == -EINVAL && (offset % align != 0 || num % align !=
> > 0)) {
>
> Could use `(offset | num) % align != 0`, but either way:
Use of | and
On Wed, Apr 09, 2025 at 02:29:13PM -0400, Stefan Hajnoczi wrote:
> Populate the pdiscard_alignment block limit so the block layer is able
> align discard requests correctly.
>
> Signed-off-by: Stefan Hajnoczi
> ---
> block/file-posix.c | 56 +-
> 1 fil
On Mon, Apr 07, 2025 at 08:47:30AM -0700, Pinku Deb Nath wrote:
> Full Unit Access (FUA) is an optimization where a disk write with the
> flag set will be persisted to disk immediately instead of potentially
> remaining in the disk's write cache.
>
> This commit address the todo task
> for using p
Am 10.04.2025 um 17:28 hat Paolo Bonzini geschrieben:
> On Thu, Apr 10, 2025 at 4:25 PM Paolo Bonzini wrote:
> > You should set ret = 0 here to avoid going down the
> > scsi_sense_from_errno() path.
> >
> > Otherwise,
> >
> > Reviewed-by: Paolo Bonzini
>
> Okay, going down the scsi_sense_from_er
On 4/11/25 07:36, Kohei Tokunaga wrote:
Hi Pierrick, thank you for the feedback.
> first, congrats for this work!
> It would be really nice to have this available upstream, starting with a
> modest TCI port, before having the tcg backend also.
Sure, I'll split the patch series, starting with
Hi Daniel,
> On Wed, Apr 09, 2025 at 03:21:15PM -0400, Stefan Hajnoczi wrote:
> > On Mon, Apr 07, 2025 at 11:45:51PM +0900, Kohei Tokunaga wrote:
> > > This patch series enables QEMU's system emulator to run in a browser
using
> > > Emscripten.
> > > It includes implementations and workarounds to
Qemu's attempts to learn whether a destination file starts life with
all zero contents are just a hueristic. There may be cases where the
caller is aware of information that qemu cannot learn quickly, in
which case telling qemu what to assume about the destination can make
the mirror operation fas
Hi Pierrick, thank you for the feedback.
> first, congrats for this work!
> It would be really nice to have this available upstream, starting with a
> modest TCI port, before having the tcg backend also.
Sure, I'll split the patch series, starting with the TCI port.
> Do you have recent informat
Hi Paolo,
> > > The biggest problem I'm seeing is we no longer support 64-bit guests
on
> > > 32-bit hosts, and don't plan to revert that.
> >
> > Yes, so the sixth patch ("[PATCH 06/10] include/exec: Allow using 64bit
> > guest addresses on emscripten") should be considered as a temporary
> > wor
Allow the guest to submit FUA requests directly, instead of forcing it
to emulate them using a regular flush.
Signed-off-by: Alberto Faria
---
hw/core/machine.c | 1 +
hw/scsi/scsi-disk.c | 2 +-
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/hw/core/machine.c b/hw/core/machine.
Simply propagate the FUA flag on write requests to the driver. The block
layer will emulate it if necessary.
Signed-off-by: Alberto Faria
---
hw/scsi/scsi-disk.c | 43 ++-
1 file changed, 10 insertions(+), 33 deletions(-)
diff --git a/hw/scsi/scsi-disk.c
Add scsi-disk support for Force Unit Access (FUA) writes. The first patch lets
us avoid FUA emulation when the underlying driver supports it natively. The
second patch makes scsi-disk devices advertise FUA support by default.
v2:
- Drop FUA write emulation logic since the block layer already does
Hi Paolo,
> > > >> has_int128_type is set to false on emscripten as of now to avoid
errors by
> > > >> libffi.
> > >
> > > What is the error here? How hard would it be to test for it?
> >
> > When has_int128_type=true, I encountered a runtime error from libffi. To
> > reproduce this, we need to a
Hi Paolo,
> > +#ifdef EMSCRIPTEN
> > +/*
> > + * emscripten exposes copy_file_range declaration but doesn't provide
the
> > + * implementation in the final link. Define the stub here but avoid
type
> > + * conflict with the emscripten's header.
> > + */
> > +ssize_t copy_file_range(int in_fd, off_
Hi Paolo,
> > On emscripten, function pointer casts can cause function call failure.
> > This commit fixes the function definition to match to the type of the
> > function call.
> >
> > - qtest_set_command_cb passed to g_once should match to GThreadFunc
>
> Sending an alternative patch that doesn'
Hi Kohei,
On 7/4/25 16:45, Kohei Tokunaga wrote:
A TB consists of a wasmTBHeader followed by the data listed below. The
wasmTBHeader contains pointers for each element:
- TCI code
- Wasm code
- Array of function indices imported into the Wasm instance
- Counter tracking the number of TB executi
Hi Christian,
> > Emscripten's fiber does not support submitting coroutines to other
> > threads. So this commit modifies hw/9pfs/coth.h to disable this behavior
> > when compiled with Emscripten.
>
> The lack of being able to dispatch a coroutine to a worker thread is one
> thing, however it woul
On Wed, Apr 09, 2025 at 03:21:15PM -0400, Stefan Hajnoczi wrote:
> On Mon, Apr 07, 2025 at 11:45:51PM +0900, Kohei Tokunaga wrote:
> > This patch series enables QEMU's system emulator to run in a browser using
> > Emscripten.
> > It includes implementations and workarounds to address browser enviro
On Fri, Apr 11, 2025 at 12:18 PM Kevin Wolf wrote:
> > Okay, going down the scsi_sense_from_errno() path is more or less
> > harmless because status and sense end up unused; even though ENODEV is
> > not something that the function handles, that can be added as a
> > cleanup in 10.1.
>
> Yes, it c
On 10/4/25 19:29, Pierrick Bouvier wrote:
On 4/10/25 10:21, Philippe Mathieu-Daudé wrote:
On 10/4/25 16:36, Pierrick Bouvier wrote:
On 4/10/25 05:14, Philippe Mathieu-Daudé wrote:
Hi Pierrick,
On 13/12/22 00:05, Philippe Mathieu-Daudé wrote:
The current definition of VHOST_USER_MAX_RAM_SLOTS
On 4/11/25 11:08, Kane Chen wrote:
Hi Markus,
Thank you for the background information.
Since the OTP device is part of the Secure Boot Controller (SBC), I plan to
register it in the global table. I believe this will simplify usage.
Meanwhile, based on Philippe's comment, I’m working on `aspe
On 4/10/25 15:13, Kohei Tokunaga wrote:
> The biggest problem I'm seeing is we no longer support 64-bit guests on
> 32-bit hosts, and don't plan to revert that.
Yes, so the sixth patch ("[PATCH 06/10] include/exec: Allow using 64bit
guest addresses on emscripten") should be considered as a tempo
Hi Markus,
Thank you for the background information.
Since the OTP device is part of the Secure Boot Controller (SBC), I plan to
register it in the global table. I believe this will simplify usage.
Meanwhile, based on Philippe's comment, I’m working on `aspeed_otp.c` to handle
low-level OTP op
On 10.04.25 20:41, Stefan Hajnoczi wrote:
When guests send misaligned discard requests, the block layer breaks
them up into a misaligned head, an aligned main body, and a misaligned
tail.
The file-posix block driver on Linux returns -EINVAL on misaligned
discard requests. This causes bdrv_co_pdi
On 10.04.25 20:41, Stefan Hajnoczi wrote:
Populate the pdiscard_alignment block limit so the block layer is able
align discard requests correctly.
Signed-off-by: Stefan Hajnoczi
---
block/file-posix.c | 56 +-
1 file changed, 55 insertions(+), 1 de
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