On Fri, Jan 31, 2020 at 4:30 AM Robin Murphy <robin.mur...@arm.com> wrote: > > ...and when that represents ~5% of the total system RAM it is a *lot* > less reasonable than even 12KB. As I said, it's great to make a debug > option more efficient such that what it observes is more representative > of the non-debug behaviour, but it mustn't come at the cost of making > the entire option unworkable for other users. >
Then I suggest you send a patch to reduce PREALLOC_DMA_DEBUG_ENTRIES because having 65536 preallocated entries consume 4 MB of memory. Actually this whole attempt to re-implement slab allocations in this file is suspect. Do not get me wrong, but if you really want to run linux on a 16MB host, I guess you need to add CONFIG_BASE_SMALL all over the places, not only in this kernel/dma/debug.c file. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu