Alberto García

O Grove (Spain)

One of the founding members of Igalia, Alberto loves computing since he got his first ZX Spectrum in the early nineties.

Latest Updates

Alberto García 17/12/2015

Improving disk I/O performance in QEMU 2.5 with the qcow2 L2 cache

QEMU 2.5 has just been released, with a lot of new features. As with the previous release, we have also created a video changelog. I plan to write a few blog posts explaining some of the things I have been working on. In this one I’m going to talk...

Alberto García 14/08/2015

I/O limits for disk groups in QEMU 2.4

QEMU 2.4.0 has just been released, and among many other things it comes with some of the stuff I have been working on lately. In this blog post I am going to talk about disk I/O limits and the new feature to group several disks together. Disk I/O limits...

Alberto García 28/11/2012

QEMU and open hardware: SPEC and FMC TDC

Working with open hardware Some weeks ago at LinuxCon EU in Barcelona I talked about how to use QEMU to improve the reliability of device drivers. At Igalia we have been using this for some projects. One of them is the Linux IndustryPack driver. For this...

Filter

By Type:

Commits

docs: Document the new default sizes of the qcow2 caches

docs: Document the new default sizes of the qcow2 caches We have just reduced the refcount cache size to the minimum unless the user explicitly requests a larger one, so we have to update the documentation to reflect this change. Signed-off-by:...

Alberto García15/05/2018

qcow2: Give the refcount cache the minimum possible size by default

qcow2: Give the refcount cache the minimum possible size by default The L2 and refcount caches have default sizes that can be overridden using the l2-cache-size and refcount-cache-size (an additional parameter named cache-size sets the combined size of...

Alberto García15/05/2018

specs/qcow2: Clarify that compressed clusters have the COPIED bit reset

specs/qcow2: Clarify that compressed clusters have the COPIED bit reset Compressed clusters are not supposed to have the COPIED bit set, but this is not made explicit in the specs, so let's document it. Signed-off-by: Alberto Garcia Message-id:...

Alberto García15/05/2018

Fix error message about compressed clusters with OFLAG_COPIED

Fix error message about compressed clusters with OFLAG_COPIED Compressed clusters are not supposed to have the COPIED bit set. "qemu-img check" detects that and prints an error message reporting the number of the affected host cluster. This doesn't...

Alberto García15/05/2018

hmp: Allow using a qdev id in block_set_io_throttle

hmp: Allow using a qdev id in block_set_io_throttle The QMP version of this command can take a qdev ID since 7a9877a02635, but the HMP version is still using the deprecated block device name so there's no way to refer to a block device added like...

Alberto García15/05/2018