Consider a domain with two guest NUMA nodes and the following
<numatune/> setting :
<numatune>
<memory mode="strict" nodeset="0"/>
<memnode cellid="0" mode="strict" nodeset="1"/>
</numatune>
What this means is the emulator thread is pinned onto host NUMA
node #0 (by setting corresponding cpuset.mems to "0"), and two
memory-backend-* objects are created:
-object '{"qom-type":"memory-backend-ram","id":"ram-node0", .., "host-nodes":[1],"policy":"bind"}' \
-numa node,nodeid=0,cpus=0-1,memdev=ram-node0 \
-object '{"qom-type":"memory-backend-ram","id":"ram-node1", .., "host-nodes":[0],"policy":"bind"}' \
-numa node,nodeid=1,cpus=2-3,memdev=ram-node1 \
Note, the emulator thread is pinned well before QEMU is even
exec()-ed.
Now, the way memory allocation works in QEMU is: the emulator
thread calls mmap() followed by mbind() (which is sane, that's
how everybody should do it). BUT, because the thread is already
restricted by CGroups to just NUMA node #0, calling:
mbind(host-nodes:[1]); /* made up syntax (TM) */
fails. This is expected though. Kernel was instructed to place
the memory at NUMA node "0" and yet, process is trying to place
it elsewhere.
We used to solve this by not restricting emulator thread at all
initially, and only after it's done initializing (i.e. we got the
QMP greeting) we placed it onto desired nodes. But this had its
own problems (e.g. QEMU might have locked pieces of its memory
which were then unable to migrate onto different NUMA nodes).
Therefore, in v5.1.0-rc1~282 we've changed this and set cgroups
upfront (even before exec()-ing QEMU). And this used to work, but
something has changed (I can't really put my finger on it).
Therefore, for the initialization start the thread with union of
all configured host NUMA nodes ("0-1" in our example) and fix the
placement only after QEMU is started.
NB, the memory hotplug suffers the same problem, but that will
be fixed in the next commit.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2138150
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
Inside of qemuProcessSetupPid() there's @numatune variable which
is set to vm->def->numa, but it lives only in one block. In the
rest of places the expanded form (vm->def->numa) is used instead.
Move the variable declaration at the beginning of the function
and use it instead of the expanded form.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
We cannot use host-nodes attribute for it, but there is no reason for us
to skip the preallocation optimisation using thread-context in such
case. Thankfully returning the proper nodemask from
qemuBuildMemoryBackendProps is enough to trigger this.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Commit 10b5e789c5 attempts to filter out the logical processor id
in the generated data to remove noise and irrelevant changes in the
output.
cpuid-leaf 0x0B may have more than two sub-leaves though. Filter out
logical processor id from all sub-leaves of 0x0B and 0x1F (superset
of the information in 0x0B).
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
The QEMU interface is still in a state of flux, and KVM support
has been pulled shortly after having been merged. Let's not
commit to a stable interface in libvirt just yet.
Reverts: 720e8f13ff
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
The QEMU interface is still in a state of flux, and KVM support
has been pulled shortly after having been merged. Let's not
commit to a stable interface in libvirt just yet.
Reverts: 1347a19f75
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
The QEMU interface is still in a state of flux, and KVM support
has been pulled shortly after having been merged. Let's not
commit to a stable interface in libvirt just yet.
Reverts: c6c9b5d251
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
The QEMU interface is still in a state of flux, and KVM support
has been pulled shortly after having been merged. Let's not
commit to a stable interface in libvirt just yet.
Reverts: b10bc8f7ab
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
It's not used as part of the build process or searched for at
build time, and the QEMU driver detects its path at runtime,
so one could think that the BuildRequires is unnecessary. But
we actually need it to be present at build time in order to
run the full test suite.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
We already do check that if there's <memory mode='restrictive'/>
then all <memnode/> have to be of 'restrictive' mode too. But
what we are missing the reverse: if there is <memnode/> with
'restrictive' mode, then the <memory/> has to be of the same mode
too.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2208946
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
When parsing a <memnode/> we also check whether the @mode
argument fulfills some requirements wrt 'restrictive' mode. This
is not the right place though. There's virDomainNumaDefValidate()
which contains other checks.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
The virDomainNumatuneNodeSpecified() function does not write into
passed @numatune pointer, it just reads from it. Therefore, the
argument should be const, which allows this function to be called
from places where virDomainNuma is already const (e.g. domain
validation code).
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
The type='pty' attribute in the <serial> element causes a Pseudo TTY to be
allocated on the host side via "/dev/ptmx", which is meant to be
interacted with via "virsh console" or similar.
That's not how a firmware log is typically viewed or saved. Replace
type='pty' with type='file', and also provide an example <source> element
(with the pathname of the logfile), similarly to how the <serial> example
just above provides a <source> element too.
Cc: "Daniel P. Berrangé" <berrange@redhat.com>
Cc: Andrea Bolognani <abologna@redhat.com>
Updates: 654968381d
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The <serial> opening tag is paired with the </console> closing tag; that's
a mismatch. The question is then whether to modify the former to
<console>, or the latter to </serial>.
Per section "Relationship between serial ports and consoles", <serial> is
used for emulated (not paravirt) consoles, and it's the type that's
suitable for early debug output (such as from firmware). Thus, change
</console> to </serial>.
Cc: "Daniel P. Berrangé" <berrange@redhat.com>
Cc: Andrea Bolognani <abologna@redhat.com>
Fixes: 654968381d
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Add new compress methods zlib and zstd for parallel migration,
these method should be used with migration option --comp-methods
and will be processed in 'qemuMigrationParamsSetCompression'.
Note that only one compress method could be chosen for parallel
migration and they cann't be used in compress migration.
Signed-off-by: Jiang Jiacheng <jiangjiacheng@huawei.com>
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Add migrate options: --compression-zlib-level
--compression-zstd-level
These options are used to set compress level for "zlib"
or "zstd" during parallel migration if the compress method
is specified.
Signed-off-by: Jiang Jiacheng <jiangjiacheng@huawei.com>
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Add description for VIR_MIGRATE_PARAM_COMPRESSION, it will
be reused in choosing compression method during parallel migration.
Add public API VIR_MIGRATE_PARAM_COMPRESSION_ZLIB_LEVEL,
VIR_MIGRATE_PARAM_COMPRESSION_ZSTD_LEVEL for migration APIs
to support set compress level during parallel migration.
Signed-off-by: Jiang Jiacheng <jiangjiacheng@huawei.com>
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Wrap the auto-generated pages (API ref and hvsupport.html) in the proper
top level element similarly to what the pages generated from RST have to
remove the extra case when templating our web.
(Best viewed with 'git show -w')
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Since we need to generate API docs for multiple input files the index
page is not useful for us and was replaced by a manual one. Drop the XSL
for generating it.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The auto-generated index contains only references to one run of the
generator but we in total run it 4 times missing the admin, lxc, and
qemu specific apis.
Rewrite it manually so that we can drop the generator for it.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Now that the table is not so wide we can treat it as any other page.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Common APIs such as virConnectOpen/Close and similar which are used by
the non-hypervisor drivers in libvirt are grouped together with
hypervisor drivers, which makes the table very wide.
Split them out into a separate group and clean up the list of hypervisor
drivers.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Use the proper driver struct member names for the aforementioned APIs so
that the fixup of the versions works properly.
Currently we reported that no of the drivers supported the APIs despite
being only shims above 'open'.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The only remaining page was 'hvsupport.html' which is generated by
'scripts/hvsupport.py'. The script already has all the data to generate
the table of contents internally so we can remove the whole complicated
template.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Final piece of conversion of our non-generated pages to 'rst'.
Special raw HTML is used for adding the appropriate code to fetch the
blog planet.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The only special bit about the 'acl' page was the inclusion of the
objects and permissions tables. We can do that by the '.. raw::'
directive.
One reference from 'aclpolkit.rst' needed to be updated to go with the
new header anchor naming.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Use the same 'margin-bottom' bot for the normal and mobile layout fixing
one of the panels touching the footer.
Use same font size both for <h1> and <h2> used as the column titles as
rst2html5 based on version can generate either of them.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Use the full width of the parent box and drop the unnecessarily bigger
margin.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Use the '#index' id to select the proper page as the body element
doesn't have 'index' class.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
When the pages were converted to rST it required changes to how the
panels are created. This change was not reproduced in the specific media
override for narrow displays and thus made those pages unusable.
Note that two lines per document are needed as some rst2html5 versions
format a <div class='section'> and others do a <section> element
instead.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
There's nothing with such element id. The last mention was removed in
2818359075
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The parser makes the values mandatory and also the qemu code implements
actions for those values. The formatter skips them though. Since
format+parse is used to copy the XML at startup a definition with those
values can't be started.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2203709
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Use DO_TEST_CAPS_LATEST to run with the latest capapbilities.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Convert all of the 'audio-default-*' cases to use capabilities from
qemu-4.2 instead of the fake caps.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Symlinks are hard to maintain and especially un-cool when attempting to
test against real capapbilities.
Replace symlinks by real files first so that we can switch to real caps
and see the difference.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This is pretty trivial, just append "mte=on/off" to -machine
arguments.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
The MTE feature is not supported by all QEMUs, only those with
QEMU_CAPS_MACHINE_VIRT_MTE capability.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
The MTE feature (introduced in QEMU commit of v5.1.0-rc1~8^2~11)
is detectable via 'qom-list-properties' for 'virt' machine type.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
The Memory Tagging Extensions are hardware acceleration present
in some ARM processors that allow memory error detection [1].
Introduce a domain XML knob that turns them on or off.
1: https://www.arm.com/blogs/blueprint/memory-safety-arm-memory-tagging-extension
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
After previous cleanup, there's not a single caller that would
call qemuDomainGetMemLockLimitBytes() with @forceVFIO set. All
callers pass false.
Drop the unneeded argument from the function.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
After previous cleanup, there's not a single caller that would
call qemuDomainAdjustMaxMemLock() with @forceVFIO set. All callers
pass false.
Drop the unneeded argument from the function.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
During hotplug of a NVMe disk we need to adjust the memlock
limit. The computation of the limit is handled by
qemuDomainGetMemLockLimitBytes() which looks at given domain
definition and accounts for various device types (as different
types require different amounts). But during disk hotplug the
disk is not added to domain definition until the very last
moment. Therefore, qemuDomainGetMemLockLimitBytes() has this
@forceVFIO argument which tells it to assume VFIO even if there
are no signs of VFIO in domain definition. And this kind of
works, until the amount needed for NVMe disks changed (in
v9.3.0-rc1~52). What's missing in the commit is making @forceVFIO
behave the same as if there was an NVMe disk present in the
domain definition.
But, we can do even better - just mimic whatever we're doing for
hostdevs. IOW - introduce qemuDomainAdjustMaxMemLockNVMe() that
behaves the same as qemuDomainAdjustMaxMemLockHostdev().
There are subtle differences though:
1) qemuDomainAdjustMaxMemLockHostdev() can afford placing hostdev
right at the end of vm->def->hostdevs, because the array was
already reallocated (at the beginning of
qemuDomainAttachHostPCIDevice()). But
qemuDomainAdjustMaxMemLockNVMe() doesn't have that luxury.
2) qemuDomainAdjustMaxMemLockHostdev() places a
virDomainHostdevDef pointer into domain definition, while
qemuDomainStorageSourceAccessModifyNVMe() (which calls
qemuDomainAdjustMaxMemLock()) sees a virStorageSource pointer
but domain definition contains virDomainDiskDef. But that's
okay, we can create a dummy disk definition and append it into
the domain definition.
After this, qemuDomainAdjustMaxMemLock() can be called with
@forceVFIO = false, as the disk is now part of domain definition
(when computing the new limit).
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2014030#c28
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
One of our examples in the 'formatbackup.rst' page shows following
config:
<disk name='vda' backup='yes'/>
The schema didn't allow it though. Fix the schema as the internals were
supposed to support it (except for the bug fixed in previous patches).
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
