Re: [PATCH RFC 2/2] net: Optimize snmp stat aggregation by walking all the percpu data at once

From: Eric Dumazet
Date: Tue Aug 25 2015 - 12:00:32 EST

On Tue, 2015-08-25 at 21:17 +0530, Raghavendra K T wrote:
> On 08/25/2015 07:58 PM, Eric Dumazet wrote:

> >
> >
> > This is a great idea, but kcalloc()/kmalloc() can fail and you'll crash
> > the whole kernel at this point.
> >
> Good catch, and my bad. Though system is in bad memory condition,
> since fill_stat is not critical for the system do you think silently
> returning from here is a good idea?
> or do you think we should handle with -ENOMEM way up.?

Hmm... presumably these 288 bytes could be allocated in
inet6_fill_ifla6_attrs() stack frame.

Also it is weird we fill all these stats for a device we just created
and never enabled : initial stats are all 0 for them.

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