* [PATCH] smp: drop support for deprecated (invalid topologies)
@ 2020-09-11 13:32 Igor Mammedov
2020-09-11 15:04 ` Michael S. Tsirkin
0 siblings, 1 reply; 5+ messages in thread
From: Igor Mammedov @ 2020-09-11 13:32 UTC (permalink / raw)
To: qemu-devel; +Cc: libvir-list, pbonzini, mst, ehabkost, rth
it's was deprecated since 3.1
Support for invalid topologies is removed, the user must ensure
that topologies described with -smp include all possible cpus,
i.e. (sockets * cores * threads) == maxcpus or QEMU will
exit with error.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
docs/system/deprecated.rst | 26 +++++++++++++-------------
hw/core/machine.c | 16 ++++------------
hw/i386/pc.c | 16 ++++------------
3 files changed, 21 insertions(+), 37 deletions(-)
diff --git a/docs/system/deprecated.rst b/docs/system/deprecated.rst
index 122717cfee..d737728fab 100644
--- a/docs/system/deprecated.rst
+++ b/docs/system/deprecated.rst
@@ -47,19 +47,6 @@ The 'file' driver for drives is no longer appropriate for character or host
devices and will only accept regular files (S_IFREG). The correct driver
for these file types is 'host_cdrom' or 'host_device' as appropriate.
-``-smp`` (invalid topologies) (since 3.1)
-'''''''''''''''''''''''''''''''''''''''''
-
-CPU topology properties should describe whole machine topology including
-possible CPUs.
-
-However, historically it was possible to start QEMU with an incorrect topology
-where *n* <= *sockets* * *cores* * *threads* < *maxcpus*,
-which could lead to an incorrect topology enumeration by the guest.
-Support for invalid topologies will be removed, the user must ensure
-topologies described with -smp include all possible cpus, i.e.
-*sockets* * *cores* * *threads* = *maxcpus*.
-
``-vnc acl`` (since 4.0.0)
''''''''''''''''''''''''''
@@ -618,6 +605,19 @@ New machine versions (since 5.1) will not accept the option but it will still
work with old machine types. User can check the QAPI schema to see if the legacy
option is supported by looking at MachineInfo::numa-mem-supported property.
+``-smp`` (invalid topologies) (removed 5.2)
+'''''''''''''''''''''''''''''''''''''''''''
+
+CPU topology properties should describe whole machine topology including
+possible CPUs.
+
+However, historically it was possible to start QEMU with an incorrect topology
+where *n* <= *sockets* * *cores* * *threads* < *maxcpus*,
+which could lead to an incorrect topology enumeration by the guest.
+Support for invalid topologies is removed, the user must ensure
+topologies described with -smp include all possible cpus, i.e.
+*sockets* * *cores* * *threads* = *maxcpus*.
+
Block devices
-------------
diff --git a/hw/core/machine.c b/hw/core/machine.c
index ea26d61237..09aee4ea52 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -754,23 +754,15 @@ static void smp_parse(MachineState *ms, QemuOpts *opts)
exit(1);
}
- if (sockets * cores * threads > ms->smp.max_cpus) {
- error_report("cpu topology: "
- "sockets (%u) * cores (%u) * threads (%u) > "
- "maxcpus (%u)",
+ if (sockets * cores * threads != ms->smp.max_cpus) {
+ error_report("Invalid CPU topology: "
+ "sockets (%u) * cores (%u) * threads (%u) "
+ "!= maxcpus (%u)",
sockets, cores, threads,
ms->smp.max_cpus);
exit(1);
}
- if (sockets * cores * threads != ms->smp.max_cpus) {
- warn_report("Invalid CPU topology deprecated: "
- "sockets (%u) * cores (%u) * threads (%u) "
- "!= maxcpus (%u)",
- sockets, cores, threads,
- ms->smp.max_cpus);
- }
-
ms->smp.cpus = cpus;
ms->smp.cores = cores;
ms->smp.threads = threads;
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index d071da787b..fbde6b04e6 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -746,23 +746,15 @@ void pc_smp_parse(MachineState *ms, QemuOpts *opts)
exit(1);
}
- if (sockets * dies * cores * threads > ms->smp.max_cpus) {
- error_report("cpu topology: "
- "sockets (%u) * dies (%u) * cores (%u) * threads (%u) > "
- "maxcpus (%u)",
+ if (sockets * dies * cores * threads != ms->smp.max_cpus) {
+ error_report("Invalid CPU topology deprecated: "
+ "sockets (%u) * dies (%u) * cores (%u) * threads (%u) "
+ "!= maxcpus (%u)",
sockets, dies, cores, threads,
ms->smp.max_cpus);
exit(1);
}
- if (sockets * dies * cores * threads != ms->smp.max_cpus) {
- warn_report("Invalid CPU topology deprecated: "
- "sockets (%u) * dies (%u) * cores (%u) * threads (%u) "
- "!= maxcpus (%u)",
- sockets, dies, cores, threads,
- ms->smp.max_cpus);
- }
-
ms->smp.cpus = cpus;
ms->smp.cores = cores;
ms->smp.threads = threads;
--
2.27.0
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH] smp: drop support for deprecated (invalid topologies)
2020-09-11 13:32 [PATCH] smp: drop support for deprecated (invalid topologies) Igor Mammedov
@ 2020-09-11 15:04 ` Michael S. Tsirkin
2020-09-14 7:37 ` Igor Mammedov
0 siblings, 1 reply; 5+ messages in thread
From: Michael S. Tsirkin @ 2020-09-11 15:04 UTC (permalink / raw)
To: Igor Mammedov; +Cc: libvir-list, pbonzini, rth, qemu-devel, ehabkost
On Fri, Sep 11, 2020 at 09:32:02AM -0400, Igor Mammedov wrote:
> it's was deprecated since 3.1
>
> Support for invalid topologies is removed, the user must ensure
> that topologies described with -smp include all possible cpus,
> i.e. (sockets * cores * threads) == maxcpus or QEMU will
> exit with error.
>
> Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Acked-by:
memory tree I guess?
> ---
> docs/system/deprecated.rst | 26 +++++++++++++-------------
> hw/core/machine.c | 16 ++++------------
> hw/i386/pc.c | 16 ++++------------
> 3 files changed, 21 insertions(+), 37 deletions(-)
>
> diff --git a/docs/system/deprecated.rst b/docs/system/deprecated.rst
> index 122717cfee..d737728fab 100644
> --- a/docs/system/deprecated.rst
> +++ b/docs/system/deprecated.rst
> @@ -47,19 +47,6 @@ The 'file' driver for drives is no longer appropriate for character or host
> devices and will only accept regular files (S_IFREG). The correct driver
> for these file types is 'host_cdrom' or 'host_device' as appropriate.
>
> -``-smp`` (invalid topologies) (since 3.1)
> -'''''''''''''''''''''''''''''''''''''''''
> -
> -CPU topology properties should describe whole machine topology including
> -possible CPUs.
> -
> -However, historically it was possible to start QEMU with an incorrect topology
> -where *n* <= *sockets* * *cores* * *threads* < *maxcpus*,
> -which could lead to an incorrect topology enumeration by the guest.
> -Support for invalid topologies will be removed, the user must ensure
> -topologies described with -smp include all possible cpus, i.e.
> -*sockets* * *cores* * *threads* = *maxcpus*.
> -
> ``-vnc acl`` (since 4.0.0)
> ''''''''''''''''''''''''''
>
> @@ -618,6 +605,19 @@ New machine versions (since 5.1) will not accept the option but it will still
> work with old machine types. User can check the QAPI schema to see if the legacy
> option is supported by looking at MachineInfo::numa-mem-supported property.
>
> +``-smp`` (invalid topologies) (removed 5.2)
> +'''''''''''''''''''''''''''''''''''''''''''
> +
> +CPU topology properties should describe whole machine topology including
> +possible CPUs.
> +
> +However, historically it was possible to start QEMU with an incorrect topology
> +where *n* <= *sockets* * *cores* * *threads* < *maxcpus*,
> +which could lead to an incorrect topology enumeration by the guest.
> +Support for invalid topologies is removed, the user must ensure
> +topologies described with -smp include all possible cpus, i.e.
> +*sockets* * *cores* * *threads* = *maxcpus*.
> +
> Block devices
> -------------
>
> diff --git a/hw/core/machine.c b/hw/core/machine.c
> index ea26d61237..09aee4ea52 100644
> --- a/hw/core/machine.c
> +++ b/hw/core/machine.c
> @@ -754,23 +754,15 @@ static void smp_parse(MachineState *ms, QemuOpts *opts)
> exit(1);
> }
>
> - if (sockets * cores * threads > ms->smp.max_cpus) {
> - error_report("cpu topology: "
> - "sockets (%u) * cores (%u) * threads (%u) > "
> - "maxcpus (%u)",
> + if (sockets * cores * threads != ms->smp.max_cpus) {
> + error_report("Invalid CPU topology: "
> + "sockets (%u) * cores (%u) * threads (%u) "
> + "!= maxcpus (%u)",
> sockets, cores, threads,
> ms->smp.max_cpus);
> exit(1);
> }
>
> - if (sockets * cores * threads != ms->smp.max_cpus) {
> - warn_report("Invalid CPU topology deprecated: "
> - "sockets (%u) * cores (%u) * threads (%u) "
> - "!= maxcpus (%u)",
> - sockets, cores, threads,
> - ms->smp.max_cpus);
> - }
> -
> ms->smp.cpus = cpus;
> ms->smp.cores = cores;
> ms->smp.threads = threads;
> diff --git a/hw/i386/pc.c b/hw/i386/pc.c
> index d071da787b..fbde6b04e6 100644
> --- a/hw/i386/pc.c
> +++ b/hw/i386/pc.c
> @@ -746,23 +746,15 @@ void pc_smp_parse(MachineState *ms, QemuOpts *opts)
> exit(1);
> }
>
> - if (sockets * dies * cores * threads > ms->smp.max_cpus) {
> - error_report("cpu topology: "
> - "sockets (%u) * dies (%u) * cores (%u) * threads (%u) > "
> - "maxcpus (%u)",
> + if (sockets * dies * cores * threads != ms->smp.max_cpus) {
> + error_report("Invalid CPU topology deprecated: "
> + "sockets (%u) * dies (%u) * cores (%u) * threads (%u) "
> + "!= maxcpus (%u)",
> sockets, dies, cores, threads,
> ms->smp.max_cpus);
> exit(1);
> }
>
> - if (sockets * dies * cores * threads != ms->smp.max_cpus) {
> - warn_report("Invalid CPU topology deprecated: "
> - "sockets (%u) * dies (%u) * cores (%u) * threads (%u) "
> - "!= maxcpus (%u)",
> - sockets, dies, cores, threads,
> - ms->smp.max_cpus);
> - }
> -
> ms->smp.cpus = cpus;
> ms->smp.cores = cores;
> ms->smp.threads = threads;
> --
> 2.27.0
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] smp: drop support for deprecated (invalid topologies)
2020-09-11 15:04 ` Michael S. Tsirkin
@ 2020-09-14 7:37 ` Igor Mammedov
2020-09-18 20:57 ` Eduardo Habkost
0 siblings, 1 reply; 5+ messages in thread
From: Igor Mammedov @ 2020-09-14 7:37 UTC (permalink / raw)
To: Michael S. Tsirkin, pbonzini; +Cc: libvir-list, rth, qemu-devel, ehabkost
On Fri, 11 Sep 2020 11:04:47 -0400
"Michael S. Tsirkin" <mst@redhat.com> wrote:
> On Fri, Sep 11, 2020 at 09:32:02AM -0400, Igor Mammedov wrote:
> > it's was deprecated since 3.1
> >
> > Support for invalid topologies is removed, the user must ensure
> > that topologies described with -smp include all possible cpus,
> > i.e. (sockets * cores * threads) == maxcpus or QEMU will
> > exit with error.
> >
> > Signed-off-by: Igor Mammedov <imammedo@redhat.com>
>
> Acked-by:
>
> memory tree I guess?
It would be better for Paolo to take it since he has
queued numa deprecations, due to context confilict in
deprecated.rst.
Paolo,
can you queue this patch as well?
>
> > ---
> > docs/system/deprecated.rst | 26 +++++++++++++-------------
> > hw/core/machine.c | 16 ++++------------
> > hw/i386/pc.c | 16 ++++------------
> > 3 files changed, 21 insertions(+), 37 deletions(-)
> >
> > diff --git a/docs/system/deprecated.rst b/docs/system/deprecated.rst
> > index 122717cfee..d737728fab 100644
> > --- a/docs/system/deprecated.rst
> > +++ b/docs/system/deprecated.rst
> > @@ -47,19 +47,6 @@ The 'file' driver for drives is no longer appropriate for character or host
> > devices and will only accept regular files (S_IFREG). The correct driver
> > for these file types is 'host_cdrom' or 'host_device' as appropriate.
> >
> > -``-smp`` (invalid topologies) (since 3.1)
> > -'''''''''''''''''''''''''''''''''''''''''
> > -
> > -CPU topology properties should describe whole machine topology including
> > -possible CPUs.
> > -
> > -However, historically it was possible to start QEMU with an incorrect topology
> > -where *n* <= *sockets* * *cores* * *threads* < *maxcpus*,
> > -which could lead to an incorrect topology enumeration by the guest.
> > -Support for invalid topologies will be removed, the user must ensure
> > -topologies described with -smp include all possible cpus, i.e.
> > -*sockets* * *cores* * *threads* = *maxcpus*.
> > -
> > ``-vnc acl`` (since 4.0.0)
> > ''''''''''''''''''''''''''
> >
> > @@ -618,6 +605,19 @@ New machine versions (since 5.1) will not accept the option but it will still
> > work with old machine types. User can check the QAPI schema to see if the legacy
> > option is supported by looking at MachineInfo::numa-mem-supported property.
> >
> > +``-smp`` (invalid topologies) (removed 5.2)
> > +'''''''''''''''''''''''''''''''''''''''''''
> > +
> > +CPU topology properties should describe whole machine topology including
> > +possible CPUs.
> > +
> > +However, historically it was possible to start QEMU with an incorrect topology
> > +where *n* <= *sockets* * *cores* * *threads* < *maxcpus*,
> > +which could lead to an incorrect topology enumeration by the guest.
> > +Support for invalid topologies is removed, the user must ensure
> > +topologies described with -smp include all possible cpus, i.e.
> > +*sockets* * *cores* * *threads* = *maxcpus*.
> > +
> > Block devices
> > -------------
> >
> > diff --git a/hw/core/machine.c b/hw/core/machine.c
> > index ea26d61237..09aee4ea52 100644
> > --- a/hw/core/machine.c
> > +++ b/hw/core/machine.c
> > @@ -754,23 +754,15 @@ static void smp_parse(MachineState *ms, QemuOpts *opts)
> > exit(1);
> > }
> >
> > - if (sockets * cores * threads > ms->smp.max_cpus) {
> > - error_report("cpu topology: "
> > - "sockets (%u) * cores (%u) * threads (%u) > "
> > - "maxcpus (%u)",
> > + if (sockets * cores * threads != ms->smp.max_cpus) {
> > + error_report("Invalid CPU topology: "
> > + "sockets (%u) * cores (%u) * threads (%u) "
> > + "!= maxcpus (%u)",
> > sockets, cores, threads,
> > ms->smp.max_cpus);
> > exit(1);
> > }
> >
> > - if (sockets * cores * threads != ms->smp.max_cpus) {
> > - warn_report("Invalid CPU topology deprecated: "
> > - "sockets (%u) * cores (%u) * threads (%u) "
> > - "!= maxcpus (%u)",
> > - sockets, cores, threads,
> > - ms->smp.max_cpus);
> > - }
> > -
> > ms->smp.cpus = cpus;
> > ms->smp.cores = cores;
> > ms->smp.threads = threads;
> > diff --git a/hw/i386/pc.c b/hw/i386/pc.c
> > index d071da787b..fbde6b04e6 100644
> > --- a/hw/i386/pc.c
> > +++ b/hw/i386/pc.c
> > @@ -746,23 +746,15 @@ void pc_smp_parse(MachineState *ms, QemuOpts *opts)
> > exit(1);
> > }
> >
> > - if (sockets * dies * cores * threads > ms->smp.max_cpus) {
> > - error_report("cpu topology: "
> > - "sockets (%u) * dies (%u) * cores (%u) * threads (%u) > "
> > - "maxcpus (%u)",
> > + if (sockets * dies * cores * threads != ms->smp.max_cpus) {
> > + error_report("Invalid CPU topology deprecated: "
> > + "sockets (%u) * dies (%u) * cores (%u) * threads (%u) "
> > + "!= maxcpus (%u)",
> > sockets, dies, cores, threads,
> > ms->smp.max_cpus);
> > exit(1);
> > }
> >
> > - if (sockets * dies * cores * threads != ms->smp.max_cpus) {
> > - warn_report("Invalid CPU topology deprecated: "
> > - "sockets (%u) * dies (%u) * cores (%u) * threads (%u) "
> > - "!= maxcpus (%u)",
> > - sockets, dies, cores, threads,
> > - ms->smp.max_cpus);
> > - }
> > -
> > ms->smp.cpus = cpus;
> > ms->smp.cores = cores;
> > ms->smp.threads = threads;
> > --
> > 2.27.0
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] smp: drop support for deprecated (invalid topologies)
2020-09-14 7:37 ` Igor Mammedov
@ 2020-09-18 20:57 ` Eduardo Habkost
2020-09-20 12:10 ` Paolo Bonzini
0 siblings, 1 reply; 5+ messages in thread
From: Eduardo Habkost @ 2020-09-18 20:57 UTC (permalink / raw)
To: Igor Mammedov; +Cc: libvir-list, pbonzini, rth, qemu-devel, Michael S. Tsirkin
On Mon, Sep 14, 2020 at 09:37:20AM +0200, Igor Mammedov wrote:
> On Fri, 11 Sep 2020 11:04:47 -0400
> "Michael S. Tsirkin" <mst@redhat.com> wrote:
>
> > On Fri, Sep 11, 2020 at 09:32:02AM -0400, Igor Mammedov wrote:
> > > it's was deprecated since 3.1
> > >
> > > Support for invalid topologies is removed, the user must ensure
> > > that topologies described with -smp include all possible cpus,
> > > i.e. (sockets * cores * threads) == maxcpus or QEMU will
> > > exit with error.
> > >
> > > Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> >
> > Acked-by:
> >
> > memory tree I guess?
>
> It would be better for Paolo to take it since he has
> queued numa deprecations, due to context confilict in
> deprecated.rst.
>
> Paolo,
> can you queue this patch as well?
I'm queueing this in machine-next (sorry for not noticing it
before I sent today's pull request).
--
Eduardo
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] smp: drop support for deprecated (invalid topologies)
2020-09-18 20:57 ` Eduardo Habkost
@ 2020-09-20 12:10 ` Paolo Bonzini
0 siblings, 0 replies; 5+ messages in thread
From: Paolo Bonzini @ 2020-09-20 12:10 UTC (permalink / raw)
To: Eduardo Habkost, Igor Mammedov
Cc: libvir-list, rth, qemu-devel, Michael S. Tsirkin
On 18/09/20 22:57, Eduardo Habkost wrote:
> On Mon, Sep 14, 2020 at 09:37:20AM +0200, Igor Mammedov wrote:
>> On Fri, 11 Sep 2020 11:04:47 -0400
>> "Michael S. Tsirkin" <mst@redhat.com> wrote:
>>
>>> On Fri, Sep 11, 2020 at 09:32:02AM -0400, Igor Mammedov wrote:
>>>> it's was deprecated since 3.1
>>>>
>>>> Support for invalid topologies is removed, the user must ensure
>>>> that topologies described with -smp include all possible cpus,
>>>> i.e. (sockets * cores * threads) == maxcpus or QEMU will
>>>> exit with error.
>>>>
>>>> Signed-off-by: Igor Mammedov <imammedo@redhat.com>
>>>
>>> Acked-by:
>>>
>>> memory tree I guess?
>>
>> It would be better for Paolo to take it since he has
>> queued numa deprecations, due to context confilict in
>> deprecated.rst.
>>
>> Paolo,
>> can you queue this patch as well?
>
> I'm queueing this in machine-next (sorry for not noticing it
> before I sent today's pull request).
It's not part of my pending pull request, so whoever comes second will
drop the patch.
Paolo
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2020-09-20 12:11 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-09-11 13:32 [PATCH] smp: drop support for deprecated (invalid topologies) Igor Mammedov
2020-09-11 15:04 ` Michael S. Tsirkin
2020-09-14 7:37 ` Igor Mammedov
2020-09-18 20:57 ` Eduardo Habkost
2020-09-20 12:10 ` Paolo Bonzini
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