Re: [PATCH v3] iommu/arm-smmu-v3: Shrink command/event/PRI queues in kdump kernel
Jason Gunthorpe <[email protected]> Tue, 4 Aug 2026 11:17:04 -0300
| Newsgroups | dev.linux.lists.iommu,org.infradead.lists.linux-arm-kernel,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <[email protected]> |
On Tue, Aug 04, 2026 at 03:02:46PM +0100, Will Deacon wrote: > > Would skipping their allocation when is_kdump_kernel() be acceptable on > > its own, or would you rather see it done differently? > > With Nicolin's patch, we can just avoid allocating the priq and the evtq > entirely in the kdump case. We can then add a cmdline option to control > the maximum size of the cmdq, which is useful regardless of kdump. I would still prefer kdump do this re-sizing automatically, even if we do add a commandline. It makes it easire to deploy than having to know secret command lines :\ So functionally I still think this patch is fine, though yes it points out more things in Nicolin's work too. Jason