[fedora-arm] Possible glibc bug manifesting only on SMP ARMv7 systems

[Gordan Bobic]

Guys,

After chasing my tail for ages thinking I had a hardware issue on an 
AC100, it looks like the random segfaults and "glibc detected a 
corrupted doubly linked list" errors might actually be SMP and/or ARMv7 
related.

Errors:
- random segfaults
- glibc detected a corrupted doubly linked list

Distro: Fedora 13

Platforms that work flawlessly (24/7 compiling for weeks):
- Marvell Kirkwood (1x SheevaPlug, 1x DreamPlug).

Platforms that cause repeatable segfaults (same rootfs, same operation):
- Tegra2 (tested using Toshiba AC100 and Compulab TrimSlice)
- OMAP 4xxx (tested on a PandaBoard)

I'm going to dig into this deeper (boot the machine with nosmp or 
tasksetting everything to run on the same core), but in the meantime I 
would like to ask if there is a bug in any of the following:

- glibc
- gcc
- binutils

that might cause them to misbehave either on:
- ARMv7 (armv5tel packages on armv7l kernel)
or
- SMP ARM systems
(or both)

I'm going to compile up a clean kernel (without all the hacks I tried on 
the AC100 to try to troubleshoot the issue) and try building the 
packages in a clean F13 mock just to do a definitive confirmation pass, 
but if anyone is aware of any such issues (e.g. due to locking 
primitives being different on ARMv7) that have been fixed in 
glibc/gcc/binutils recently, I would appreciate any info you may have on 
the subject.

Ubuntu doesn't appear to suffer from this issue, but they use a much 
newer gcc and a different glibc than what is in F13.

Gordan