Messages in this thread | | | Date | Sat, 15 May 2004 13:15:47 +1000 | From | Lincoln Dale <> | Subject | Re: 1352 NUL bytes at the end of a page? (was Re: Assertion `s && s->tree' failed: The saga continues.) |
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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?
i.e. - 1500 byte MTU - less 28 bytes for PPP header (1472 bytes) - less 20 bytes for IP header (1452 bytes) - less 20 bytes for TCP header (1432 bytes)
if, however, the MRU is actually negotiated to be 1420 rather than 1500 . . .
when you issue the "bk pull", it may be interesting to see the output from: tcpdump -i ppp0 -n | grep mss
cheers,
lincoln.
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