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authorIngo Molnar <mingo@kernel.org>2021-02-12 12:50:09 +0100
committerIngo Molnar <mingo@kernel.org>2021-02-12 12:56:55 +0100
commit85e853c5ec8486117182baab10c98b321daa6d47 (patch)
tree404551f51bc88ba9f4cc64431e2633493a971842 /mm/vmalloc.c
parentdcc0b49040c70ad827a7f3d58a21b01fdb14e749 (diff)
parent0d2460ba61841e5c2e64e77f7a84d3fc69cfe899 (diff)
Merge branch 'for-mingo-rcu' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu
Pull RCU updates from Paul E. McKenney: - Documentation updates. - Miscellaneous fixes. - kfree_rcu() updates: Addition of mem_dump_obj() to provide allocator return addresses to more easily locate bugs. This has a couple of RCU-related commits, but is mostly MM. Was pulled in with akpm's agreement. - Per-callback-batch tracking of numbers of callbacks, which enables better debugging information and smarter reactions to large numbers of callbacks. - The first round of changes to allow CPUs to be runtime switched from and to callback-offloaded state. - CONFIG_PREEMPT_RT-related changes. - RCU CPU stall warning updates. - Addition of polling grace-period APIs for SRCU. - Torture-test and torture-test scripting updates, including a "torture everything" script that runs rcutorture, locktorture, scftorture, rcuscale, and refscale. Plus does an allmodconfig build. Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'mm/vmalloc.c')
-rw-r--r--mm/vmalloc.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index e6f352bf0498..4f5f8c907897 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -3450,6 +3450,19 @@ void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms)
}
#endif /* CONFIG_SMP */
+bool vmalloc_dump_obj(void *object)
+{
+ struct vm_struct *vm;
+ void *objp = (void *)PAGE_ALIGN((unsigned long)object);
+
+ vm = find_vm_area(objp);
+ if (!vm)
+ return false;
+ pr_cont(" %u-page vmalloc region starting at %#lx allocated at %pS\n",
+ vm->nr_pages, (unsigned long)vm->addr, vm->caller);
+ return true;
+}
+
#ifdef CONFIG_PROC_FS
static void *s_start(struct seq_file *m, loff_t *pos)
__acquires(&vmap_purge_lock)