Re: [PATCH 2/4] kmemleak: Handle percpu memory allocation

From: Tejun Heo
Date: Tue Oct 04 2011 - 13:00:08 EST

Hello, Catalin.

On Tue, Oct 04, 2011 at 10:26:24AM +0100, Catalin Marinas wrote:
> Before kmemleak is initialised we still get memory allocations that
> kmemleak stores in an early_log buffer (via the log_early() function
> called from kmemleak_alloc_percpu). Later when kmemleak has all the data
> structures in place, the kmemleak_init() function goes through the
> early_log array and replays the previously recorded requests. The
> early_alloc_percpu() function is used during early_log replaying and it
> indeed registers every percpu memory block but the early_log is always
> The reason we don't call kmemleak_alloc_percpu() directly during
> replaying is that early_alloc() also copies the previously recorded
> stack trace into the newly created object (otherwise all early
> allocations would be shown as done by kmemleak_init).

Ah, okay, I was misreading the patch. For some reason, log_early()
was nested inside for_each_possible_cpu(), but one other thing.
kmemleak_free_percpu() is calling log_early() w/ KMEMLEAK_FREE.


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at