favourite vfs globals

[Pat LaVarre <p.lavarre@ieee.org>]

Which vfs globals are the most fun, in lk like 2.6.0-test11?

Pat LaVarre

P.S. I ask because:

> From: http://marc.theaimsgroup.com/?l=linux-fsdevel&m=107004461717172
> Subject:  Re: zeroes read back more often than appended
> Date:     2003-11-28 18:29:39
>
> CONFIG_DEBUG_KERNEL=y
> CONFIG_DEBUG_INFO=y
> CONFIG_DEBUG_SLAB=y
> CONFIG_MAGIC_SYSRQ=y

gdb vmlinux /proc/kcore

indeed does let me print globals that make some kind of sense. 
Specifically on my own in stunning ignorance, I notice Six things:

1) `?` suggests `help`.

2) `help` suggests `info variables`.

3) `info variables` takes minutes to complete, but writes its list out
thru tee if first you thought to tee your sudo'ed gdb.

4) `info variables vfs` completes much more quickly.

5) `print xtime` returns the same result til you `quit` and re-enter
gdb, also that result appears in between what `date +'%s %N'` prints
before and after, suggesting that this approach to gdb takes a blurry
snapshot of kernel memory and then walks us thru a stale copy of all the
bits.

6) Substituting /dev/kmem for /proc/kcore prints zero for xtime,
suggesting sym table addresses somehow not sync'ed with physical memory
in that abuse.