I've encountered a loopback bug on kernel-2.4.3+international_patch. I haven't been able to pin down what the bug is exactly, but these are the conditions under which it manifests: 1. connect file to loopback device 2. build fs on loopback device 3. mount fs and use it 4. read the file 5. lockup, about 1 out 5 times. The lockup occurs randomly and seems to have random effects. Sometimes user-space scheduling is lost and sometimes there is a total lockup. This is all I could extract from /var/log/messages in several crashes: Apr 9 04:04:48 gs176 kernel: kernel BUG at dcache.c:658! Apr 9 04:04:48 gs176 kernel: invalid operand: 0000 Apr 9 04:04:48 gs176 kernel: CPU: 0 -John Stats: Linux version 2.4.3 + patch-int-2.4.3.1 compiler - redhat's hacked 2.96 (I'll try gcc->kgcc next.) Also appeared with 2.4.2 + patch-2.4.3-pre4 + patch-int-2.4.0.3 compiler egcs-1.1.2 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/