Re: [fuse-devel] mmap or something else???....

[Leandro F. <leo...@gm...>]

Hi again...

after the last email I tried the 'hard_remove' option and the problem
went away....
the gcc test even says that mmap works.....

I dont know the consecuences but for the moment i dont need to delete
open files and such things in the file system so i will reluctantly
move on.....

but if you have any ideas.... they are always welcome....


Thank you very much for your effort

Leandro Franco


> thanks for the help and the quick reply ....
>=20
> > What's the FUSE version?  Is there any Oops in dmesg output?
>=20
> 2.2 .... and I havent seen any...
>=20
> > Try setting the core-dump limit to infinity:
> >
> >    ulimit -c unlimited
> >
> > Then run the filesystem.  And after it crashes, look at the corefile
> > with gdb (or anjuta).
>=20
> ok, I will try... for the moment i would like you to take a look of
> debug output....
>=20
> now i'm really lost because it mentions the fuse_hidden files.... (the
> possibility of my doing something silly is significant... it could be
> a really trivial error but for the moment i dont see it)...
>=20
> and the last call to the hidden file is the one after crashing the file s=
ystem
>=20
> unique: 1325, opcode: LOOKUP (1), nodeid: 10, insize: 49
> LOOKUP /src/gcc-3.4.3/intl/conftestmmap
>    unique: 1325, error: -2 (No such file or directory), outsize: 16
> unique: 1326, opcode: MKNOD (8), nodeid: 10, insize: 57
> MKNOD /src/gcc-3.4.3/intl/conftestmmap
> mknod   : /src/gcc-3.4.3/intl/conftestmmap
>    NODEID: 61
>    unique: 1326, error: 0 (Success), outsize: 136
> unique: 1327, opcode: OPEN (14), nodeid: 61, insize: 40
> open : /src/gcc-3.4.3/intl/conftestmmap
> OPEN[154812024] flags: 0x1
>    unique: 1327, error: 0 (Success), outsize: 28
> unique: 1328, opcode: WRITE (16), nodeid: 61, insize: 4156
> WRITE[154812024] 4096 bytes to 0
> write : /src/gcc-3.4.3/intl/conftestmmap
>    unique: 1328, error: 0 (Success), outsize: 20
> unique: 1329, opcode: RELEASE (18), nodeid: 61, insize: 48
> RELEASE[154812024] flags: 0x1
> release : /src/gcc-3.4.3/intl/conftestmmap
>    unique: 1329, error: 0 (Success), outsize: 16
> unique: 1330, opcode: OPEN (14), nodeid: 61, insize: 40
> open : /src/gcc-3.4.3/intl/conftestmmap
> OPEN[154812024] flags: 0x2
>    unique: 1330, error: 0 (Success), outsize: 28
> unique: 1331, opcode: READ (15), nodeid: 61, insize: 56
> READ[154812024] 4096 bytes from 0
> read : /src/gcc-3.4.3/intl/conftestmmap
>    READ[154812024] 4096 bytes
>    unique: 1331, error: 0 (Success), outsize: 4112
> unique: 1332, opcode: UNLINK (10), nodeid: 10, insize: 49
> UNLINK /src/gcc-3.4.3/intl/conftestmmap
>    unique: 1332, error: 0 (Success), outsize: 16
> unique: 1333, opcode: RELEASE (18), nodeid: 60, insize: 48
> RELEASE[0] flags: 0x0
> release : /src/gcc-3.4.3/intl/conftest
>    unique: 1333, error: 0 (Success), outsize: 16
> unique: 1334, opcode: RELEASE (18), nodeid: 61, insize: 48
> RELEASE[154812024] flags: 0x2
> release : /src/gcc-3.4.3/intl/.fuse_hidden0000003d00000001
> unlink  : /src/gcc-3.4.3/intl/.fuse_hidden0000003d00000001
>=20
> and from gcc:
> checking for working mmap... rm: cannot remove `conftest*': Transport
> endpoint is not connected
>=20
>=20
> I suppose it deletes the file while it's still open so FUSE creates
> the hidden file... but somewhere between closing it and deleting it my
> system crashes.....
>=20
>=20
> > A bit more of the debug trace would have been useful.
> >
> > At the end of the trace there's an UNLINK and then a RELEASE for
> > probably the same file.  This could be the cause of the problem.
> >
> yeap.... i think it's the same file.... but it has been renamed.... i
> dont know the details of FUSE so I'm not sure if I'm doing something I
> shouldnt
>=20
> > What mount options do you give to FUSE?  Is 'hard_remove' one of them?
> >
> just like that:
> -d -o allow_other,large_read
>=20
> and....
> Linux 2.4.21-27.0.2.EL
>=20
> > Thanks,
> > Miklos
> >
>=20
> Thank you....
>=20
> Leandro Franco
>