2015-11-26 09:38:33

by Ohad Ben Cohen

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Subject: Re: [PATCH 2/2] remoteproc: fix memory leak of remoteproc ida cache layers

Hi Suman,

On Thu, Sep 17, 2015 at 3:29 AM, Suman Anna <[email protected]> wrote:
> The remoteproc core uses a static ida named rproc_dev_index for
> assigning an automatic index number to a registered remoteproc.
> The ida core may allocate some internal idr cache layers and ida
> bitmap upon any ida allocation, and all these layers are truely
> freed only upon the ida destruction. The rproc_dev_index ida is
> not destroyed at present, leading to a memory leak when using the
> remoteproc core as a module and atleast one rproc device is
> registered and unregistered.
>
> Fix this by invoking ida_destroy() in the remoteproc core module
> exit.

I saw there was some discussion about this between Michael, James and
Tejun whether this should be fixed in the IDA core or not.

Has it been resolved?

Thanks,
Ohad.


2015-11-26 10:37:07

by Michael S. Tsirkin

[permalink] [raw]
Subject: Re: [PATCH 2/2] remoteproc: fix memory leak of remoteproc ida cache layers

On Thu, Nov 26, 2015 at 11:38:06AM +0200, Ohad Ben-Cohen wrote:
> Hi Suman,
>
> On Thu, Sep 17, 2015 at 3:29 AM, Suman Anna <[email protected]> wrote:
> > The remoteproc core uses a static ida named rproc_dev_index for
> > assigning an automatic index number to a registered remoteproc.
> > The ida core may allocate some internal idr cache layers and ida
> > bitmap upon any ida allocation, and all these layers are truely
> > freed only upon the ida destruction. The rproc_dev_index ida is
> > not destroyed at present, leading to a memory leak when using the
> > remoteproc core as a module and atleast one rproc device is
> > registered and unregistered.
> >
> > Fix this by invoking ida_destroy() in the remoteproc core module
> > exit.
>
> I saw there was some discussion about this between Michael, James and
> Tejun whether this should be fixed in the IDA core or not.
>
> Has it been resolved?
>
> Thanks,
> Ohad.

I don't think we reached any conclusions.
I guess I'll merge the virtio patch as-is then.
Ohad, would you like to merge 2/2?

--
MST

2015-11-26 15:48:05

by Ohad Ben Cohen

[permalink] [raw]
Subject: Re: [PATCH 2/2] remoteproc: fix memory leak of remoteproc ida cache layers

On Thu, Nov 26, 2015 at 12:37 PM, Michael S. Tsirkin <[email protected]> wrote:
> On Thu, Nov 26, 2015 at 11:38:06AM +0200, Ohad Ben-Cohen wrote:
>> I saw there was some discussion about this between Michael, James and
>> Tejun whether this should be fixed in the IDA core or not.
>>
>> Has it been resolved?
>
> I don't think we reached any conclusions.
> I guess I'll merge the virtio patch as-is then.
> Ohad, would you like to merge 2/2?

Sure, applied 2/2 to remoteproc-fixes. Thanks!