Re: [PATCH v3 0/2] iommu/iova: Make the rcache depot properly flexible

[Ido Schimmel]

On Thu, Dec 28, 2023 at 02:23:20PM +0200, Ido Schimmel wrote:
> On Tue, Sep 12, 2023 at 05:28:04PM +0100, Robin Murphy wrote:
> > v2: https://lore.kernel.org/linux-iommu/cover.1692641204.git.robin.murphy@xxxxxxx/
> > 
> > Hi all,
> > 
> > I hope this is good to go now, just fixed the locking (and threw
> > lockdep at it to confirm, which of course I should have done to begin
> > with...) and picked up tags.
> 
> Hi,
> 
> After pulling the v6.7 changes we started seeing the following memory
> leaks [1] of 'struct iova_magazine'. I'm not sure how to reproduce it,
> which is why I didn't perform bisection. However, looking at the
> mentioned code paths, they seem to have been changed in v6.7 as part of
> this patchset. I reverted both patches and didn't see any memory leaks
> when running a full regression (~10 hours), but I will repeat it to be
> sure.

FYI, we didn't see the leaks since reverting these two patches whereas
before we saw them almost everyday, so I'm quite sure they introduced
the leaks.

Thanks