Re: New Kernel Bug (a small one)

On Mon, 28 Oct 2002, Alain wrote:

> > I tried NDN 2.02 both on a "network" (DOSEMU lredir) drive and a FAT drive
> > with 2027rc and I didn't get a critical error for F8. Could you try and
> > see what the behaviour is with kernel versions 2026b and 2027te?
>
> I tested both with the same problem :(
> Did you test it on a "real" machine?

I did the same now with logging on and low and behold I have the same
problem as you (critical error)

> I believe that this problem and the "copy with F5" problem
> are very much related. As well as the "not closing files" on
> the network: this last one just looks like NDN just could
> detect that the file was not closed! What as the not closing
> problem? how did you fix it?

Tom fixed it. The not closing problem was a new bug; but probably
unrelated to what you see here.

> I made a small test creating a file and then deleting it with
> unlink() and all looks ok. Is there other ways of deleting a file?

No, but see this log:

INT21 (0) at 23bf:0042: AX=2c01, BX=297f, CX=0000, DX=0014, DS=297f, ES=5f29
INT21 (0) at 23bf:000c: AX=2a00, BX=0000, CX=0001, DX=0000, DS=297f, ES=5f29
INT21 (0) at 23bf:0042: AX=2c01, BX=297f, CX=0000, DX=0014, DS=297f, ES=5f29
INT21 (0) at 23bf:000c: AX=2a01, BX=0000, CX=0001, DX=0000, DS=297f, ES=5f29

here NDN is waiting while checking date and time after I press F8. Then I
say yes.

INT21 (0) at 24bc:3ef0: AX=1900, BX=454e, CX=0000, DX=297f, DS=3771, ES=5f15

get current default drive, nothing special

INT21 (0) at 24bc:3f03: AX=4743, BX=454e, CX=0000, DX=2903, DS=3771, ES=5f15
INT21 (0) at 24bc:3f03: AX=4783, BX=0000, CX=6186, DX=6143, DS=3771, ES=6186

get current directory (twice for some reason)

INT21 (0) at 456b:0207: AX=4409, BX=0043, CX=004c, DX=6143, DS=297f, ES=3771

check if block device remote

INT21 (0) at 0be0:05eb: AX=5942, BX=0000, CX=2000, DX=1707, DS=297f, ES=61d9

get extended error info. now NDN thinks it's a critical error; I say
"abort".

INT21 (0) at 23bf:0042: AX=2c01, BX=297f, CX=0000, DX=0014, DS=297f, ES=5f29
INT21 (0) at 23bf:000c: AX=2a20, BX=0000, CX=0001, DX=0000, DS=297f, ES=5f29
INT21 (0) at 24bc:3dea: AX=4100, BX=654c, CX=0000, DX=6cd4, DS=3771, ES=3771
check date time and delete the file. This goes all well and merry.

So I'm thinking it's a problem between ax=4409 and ah=59.
I think I should be able to fix this after all. Stay tuned.

Bart