Merge tag 'v7.0-rc2' into __tmp-hverkuil-media-tags_br_v7_1a

Linux 7.0-rc2

* tag 'v7.0-rc2': (372 commits)
  Linux 7.0-rc2
  firewire: ohci: initialize page array to use alloc_pages_bulk() correctly
  KVM: always define KVM_CAP_SYNC_MMU
  KVM: remove CONFIG_KVM_GENERIC_MMU_NOTIFIER
  selftests/bpf: Avoid simplification of crafted bounds test
  selftests/bpf: Test refinement of single-value tnum
  bpf: Improve bounds when tnum has a single possible value
  bpf: Introduce tnum_step to step through tnum's members
  bpf: Fix race in devmap on PREEMPT_RT
  bpf: Fix race in cpumap on PREEMPT_RT
  selftests/bpf: Add tests for special fields races
  bpf: Retire rcu_trace_implies_rcu_gp() from local storage
  bpf: Delay freeing fields in local storage
  bpf: Lose const-ness of map in map_check_btf()
  bpf: Register dtor for freeing special fields
  PCI: Correct PCI_CAP_EXP_ENDPOINT_SIZEOF_V2 value
  smb: client: Use snprintf in cifs_set_cifscreds
  mm/slab: initialize slab->stride early to avoid memory ordering issues
  smb: client: Don't log plaintext credentials in cifs_set_cifscreds
  smb: client: fix broken multichannel with krb5+signing
  ...

1 files changed, 18 insertions, 1 deletions

diff --git a/lib/debugobjects.c b/lib/debugobjects.c
index 89a1d6745dc2..12f50de85b62 100644
--- a/lib/debugobjects.c
+++ b/lib/debugobjects.c
@@ -398,9 +398,26 @@ static void fill_pool(void)
 
 	atomic_inc(&cpus_allocating);
 	while (pool_should_refill(&pool_global)) {
+		gfp_t gfp = __GFP_HIGH | __GFP_NOWARN;
 		HLIST_HEAD(head);
 
-		if (!kmem_alloc_batch(&head, obj_cache, __GFP_HIGH | __GFP_NOWARN))
+		/*
+		 * Allow reclaim only in preemptible context and during
+		 * early boot. If not preemptible, the caller might hold
+		 * locks causing a deadlock in the allocator.
+		 *
+		 * If the reclaim flag is not set during early boot then
+		 * allocations, which happen before deferred page
+		 * initialization has completed, will fail.
+		 *
+		 * In preemptible context the flag is harmless and not a
+		 * performance issue as that's usually invoked from slow
+		 * path initialization context.
+		 */
+		if (preemptible() || system_state < SYSTEM_SCHEDULING)
+			gfp |= __GFP_KSWAPD_RECLAIM;
+
+		if (!kmem_alloc_batch(&head, obj_cache, gfp))
 			break;
 
 		guard(raw_spinlock_irqsave)(&pool_lock);