Re: 1352 NUL bytes at the end of a page? (was Re: Assertion `s && s->tree' failed: The saga continues.)

Andrew Morton
2004-05-15T03:42:33Z

Lincoln Dale <ltd@cisco.com> wrote:
>
> At 02:53 AM 15/05/2004, Andy Isaacson wrote:
> >That corruption size really does make me think of network packets, so
> >I'm tempted to blame it on PPP. Can you find out the MTU of your PPP
> >link? "ifconfig ppp0" or something like that.
>
> 1352 bytes coule be remarkably close to the TCP MSS . . .
> perhaps there is some interaction with ppp where there is an overrun / lost
> packet and the TCP window is mistakenly advanced?

Steve, if it's a memory stomp then perhaps CONFIG_DEBUG_PAGEALLOC and
CONFIG_DEBUG_SLAB might pick it up.

It seems awfully deterministic though.