On Thu, 1 May 2003 20:16:00 -0400 Chuck Ebbert <76306.1226@compuserve.com> wrote:
| Randy Dunlap wrote:
|
| > The reason that I say that is that I can reproduce this problem on
| > 2.5.68, but only in an xterm or similar window, but when I switch back
| > to a console, the entire device list is displayed.
|
| There are strange bugs in the console layer and/or the VGA text console.
| Choosing 34-line text mode results in a 30-line screen that the system
| thinks has 34, with four 'hidden' lines at the bottom (on PCI TNT adapter.)
| Maybe a similar thing is happening in X?
I don't think it's quite as deep down as all that. I built cat.c with
some additional debugging fprintf()s in it. When I run it from the
text console, it tells me that the variable <outsize> is 4096
(derived from #define ST_BLKSIZE(statbuf) <about 4 different #defines>.
However, when run from an X terminal window, it tells me that outsize
is 1024.
I don't have time right now to dig into the 4 #defines for ST_BLKSIZE
to see where the problem is.
Anyway, it looks as though the kernel read function for /proc/net/dev
is filling up cat's buffer and just stopping, which seems OK to me.
Looks like a cat bug IMO, but I haven't finished looking at it.
| And BTW I found a way to get lots of network devices:
|
| 1. Load the gre tunneling driver (GRE tunnels over IP)
| 2. ip tunnel add gre1 mode gre remote 127.1.1.1 local 127.0.0.1 dev lo
| 3. Repeat for as many as you like... I can't make the kernel
| send packets through them but they show up on the list.
OK. Loading dummy driver multiple times is OK for this.
Later,
-- ~Randy - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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