On 7/25/13 2:03 PM, Jeff Mahoney wrote:
On 7/25/13 1:40 PM, Cristian Rodríguez wrote:
El 25/07/13 13:32, Jeff Mahoney escribió:
What's the flags line of your /proc/cpuinfo say?
The Oops is in memcpy, which is /super/ optimized based on processor capabilities.
-Jeff
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm ida dtherm tpr_shadow vnmi flexpriority ept vpid
Ok. You have the rep_good bit but not the erms bit, so that means the memcpy implementation is memcpy_c.
It looks like the source buffer is invalid.
-Jeff
Ok, I've added a BUG_ON to detect whether we're overrunning the index in extent_buffer_page(). Can you test with a kernel with this commit? commit 15eacb944c080a4757ad6634cc1363bd3705cff4 Author: Jeff Mahoney <jeffm@suse.com> Date: Thu Jul 25 16:55:37 2013 -0400 btrfs: check index in extent_buffer_page. -Jeff -- Jeff Mahoney SUSE Labs