On Mon, 19 Feb 2007, Srdjan Todorovic wrote: > Hi Robert, > > On Mon, 19 Feb 2007, Robert P. J. Day wrote: > > > a quick question regarding debugging the currently-running kernel > > with gdb. after compiling the kernel with debugging info and > > rebooting, i started the debugger with: > > > > # gdb vmlinux /proc/kcore > > > > and, as a test, tried: > > > > (gdb) print jiffies > > > > what i got printed was a *negative* number, which struck me as odd > > -- it was around -150000. it took only a few minutes for that to > > finally click over zero and become positive but is there some > > reason that the number of jiffies since boot time would display as > > negative, at least temporarily? > > >From Understanding the Linux Kernel, 3rd edition, page 234, it says > >that > jiffies is initialised to -300000. The jiffies variable overflow > would then occur in 5 minutes since kernel boot time. It says this > was intentional, so that buggy kernels could be spotted soon after > booting. great, thanks. rday -- ======================================================================== Robert P. J. Day Linux Consulting, Training and Annoying Kernel Pedantry Waterloo, Ontario, CANADA http://fsdev.net/wiki/index.php?title=Main_Page ======================================================================== -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
