Re: [PATCH 5.15.y v2 0/2] fix softlockups in stage2_apply_range()

[Greg KH <gregkh@linuxfoundation.org>]

On Wed, Mar 06, 2024 at 10:08:40AM +0000, Marc Zyngier wrote:
> On Wed, 06 Mar 2024 00:49:34 +0000,
> Krister Johansen <kjlx@templeofstupid.com> wrote:
> > 
> > Hi Stable Team,
> > In 5.15, unmapping large kvm vms on arm64 can generate softlockups.  My team has
> > been hitting this when tearing down VMs > 100Gb in size.
> > 
> > Oliver fixed this with the attached patches.  They've been in mainline since
> > 6.1.
> > 
> > I tested on 5.15.150 with these patches applied. When they're present,
> > both the dirty_log_perf_test detailed in the second patch, and
> > kvm_page_table_test no longer generate softlockups when unmapping VMs
> > with large memory configurations.
> > 
> > Would you please consider these patches for inclusion in an upcoming 5.15
> > release?
> > 
> > Change in v2:  I ran format-patch without the --from option which incorrectly
> > generated the first series without leaving Oliver in place as the author.  The
> > v2 should retain the correct authorship.  Apologies for the mistake.
> 
> Thanks for this.
> 
> FWIW,
> 
> Acked-by: Marc Zyngier <maz@kernel.org>

Now queued up,t hanks.

greg k-h