On 04/01/2016 02:40 AM, kernel test robot wrote:
FYI, we noticed the below changes on
https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git
wb-buf-throttle
commit 1131f64d74958d495d8a6d5f9b981e86ed3beb7a ("blk-mq: don't throttle for virtual
devices")
+------------------------------------------+------------+------------+
| | f21fb0e42c | 1131f64d74 |
+------------------------------------------+------------+------------+
| boot_successes | 6 | 0 |
| boot_failures | 0 | 6 |
| BUG:unable_to_handle_kernel | 0 | 6 |
| Oops | 0 | 6 |
| RIP:blk_wb_wait | 0 | 6 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 6 |
| backtrace:init | 0 | 6 |
| backtrace:kernel_init_freeable | 0 | 6 |
+------------------------------------------+------------+------------+
[ 8.897469] FDC 0 is a S82078B
[ 8.984074] brd: module loaded
[ 9.030737] loop: module loaded
[ 9.045718] BUG: unable to handle kernel NULL pointer dereference at
0000000000000008
[ 9.048069] IP: [<ffffffff815336b0>] blk_wb_wait+0x5/0x174
Fixed:
http://git.kernel.dk/cgit/linux-block/commit/?h=wb-buf-throttle&id=811ea72827a70139a0520ec07b39d6a4baa62de1
it was introduced by this commit:
http://git.kernel.dk/cgit/linux-block/commit/?h=wb-buf-throttle&id=1131f64d74958d495d8a6d5f9b981e86ed3beb7a
and both will be folded for the next release.
--
Jens Axboe
