ARM kernel (& ext3) stability issues with GCC 4.8?
From: aaro.koskinen@iki.fi (Aaro Koskinen)
Date: 2014-01-21 19:59:15
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linux-ext4, lkml
Hi, On Fri, Jun 14, 2013 at 01:04:29AM +0300, Aaro Koskinen wrote:
I'm having severe stability issues with 3.10-rc5 on OpenRD (kirkwood) when cross-compiling it using GCC 4.8.1 (I tried also GCC 4.8.0 with 3.9-something earlier with pretty much same results).
[...]
[ 3383.627778] ------------[ cut here ]------------ [ 3383.654029] kernel BUG at fs/buffer.c:2956!
It looks like the issue was caused by GCC bug 58854 (http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58854). The bug is still present in GCC 4.8.2 but there's a fix available in GCC repository. The bug resulted in at least fs/buffer.c getting compiled incorrectly, and what we saw were kernel crashes or file system getting corrupted or both. A.