Messages in this thread | | | From | Bernd Schubert <> | Subject | Re: x86_64: 32bit emulation problems | Date | Tue, 1 Mar 2005 22:07:01 +0100 |
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Hello Andi,
sorry, due to some mail sending/refusing problems, I had to resend to the nfs-list, which prevented the answers there to be posted to the other CCs.
> It is most likely some kind of user space problem. I would change > it to int err = stat(dir, &buf); > and then go through it with gdb and see what value err gets assigned. > > I cannot see any kernel problem.
The err value will become -1 here.
Trond Myklebust already suggested to look at the results of errno:
On Tuesday 01 March 2005 00:43, Bernd Schubert wrote: > On Monday 28 February 2005 23:26, you wrote: > > Given that strace shows that both syscalls (stat64() and stat()) > > succeed, I expect the "problem" is probably just glibc setting an > > EOVERFLOW error in the 32-bit case. That's what it is supposed to do if > > a 64 bit value overflows the 32-bit buffers. > > Right, thanks. > > > Have you tried looking at errno? > > bernd@hitchcock tests>./test_stat32 /mnt/test/yp > stat for /mnt/test/yp failed > ernno: 75 (Value too large for defined data type) > > But why does stat64() on a 64-bit kernel tries to fill in larger data than > on a 32-bit kernel and larger data also only for nfs-mount points? Hmm, I > will tomorrow compare the tcp-packges sent by the server.
So I still think thats a kernel bug.
Thanks, Bernd
-- Bernd Schubert Physikalisch Chemisches Institut / Theoretische Chemie Universität Heidelberg INF 229 69120 Heidelberg e-mail: bernd.schubert@pci.uni-heidelberg.de - 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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