We've got three reports now (two are syzkaller kiddie stuff, but one's a real workload) of a warning in the page allocator from filesystems doing reclaim. Essentially they're using GFP_NOFAIL from reclaim context. This got me thinking about bs>PS and I realised that if we fix this, then we're going to end up trying to do high order GFP_NOFAIL allocations in the memory reclaim path, and that is really no bueno. https://lore.kernel.org/linux-mm/20250326105914.3803197-1-matt@xxxxxxxxxxxxxxxx/ I'll prepare a better explainer of the problem in advance of this. It looks like we have a slot at 17:30 today? Required attendees: Ted, Luis, Chris, Josef, other people who've wrestled with this before.
