I was compiling QT 4.1.1 on my Gentoo box when I've got "internal
compiler error: segmentation fault".

Looking at dmesg:

[ 2398.483016] slab error in slab_destroy_objs(): cache
`radix_tree_node': end of a freed object was overwritten [ 2398.483021]
[ 2398.483022] Call Trace: <ffffffff80159581>{__slab_error+33}
<ffffffff8015a8ab>{slab_destroy+168} [ 2398.483032]
<ffffffff8015aa84>{free_block+349}
<ffffffff8015abdc>{cache_flusharray+116} [ 2398.483040]
<ffffffff8015a7e5>{kmem_cache_free+84}
<ffffffff801e84ef>{radix_tree_delete+509} [ 2398.483047]
<ffffffff80160946>{free_buffer_head+53}
<ffffffff801609be>{try_to_free_buffers+118} [ 2398.483053]
<ffffffff80141104>{__remove_from_page_cache+28}
<ffffffff8014985f>{shrink_zone+2676} [ 2398.483061]
<ffffffff801596c4>{kmem_freepages+196}
<ffffffff8015a908>{slab_destroy+261} [ 2398.483070]
<ffffffff8014a001>{balance_pgdat+571} <ffffffff8014a26b>{kswapd+270}
[ 2398.483077]        <ffffffff801361ce>{autoremove_wake_function+0}
<ffffffff801361ce>{autoremove_wake_function+0} [ 2398.483084]
<ffffffff8010b1b6>{child_rip+8} <ffffffff8014a15d>{kswapd+0}
[ 2398.483090]        <ffffffff8010b1ae>{child_rip+0}


stripped config, dmesg & meminfo & slabinfo grabbed shortly after gcc
segfault are attached.

PS: I've got another "gcc segfault" trying to build Qt again after a
reboot but I don't think this is a memory problem (actually I have
a memory problem (single bit error) but it should be cured with
memmap=1K$214014K ;).

This time there's nothing strange in dmesg so maybe gcc segfaults have
nothing to do with slab error.

-- 
	Paolo Ornati
	Linux 2.6.16 on x86_64