驱动测试错误集锦
2015-12-03 20:29
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1,加载驱动报错
“insmod:error inserting './dcache.ko': -1 Cannot allocate memory”
是因为你原来可能已经存在一个这样的驱动了,需要卸载掉。
2,卸载过程
* Remove a cache: Assuming your cache is named "fo o", run commands: umount /dev/mapper/foo dmsetup remove foo rmmod dcache lsmod insmod dcache
3,error: invalid storage class for function
就是因为少了一个“}”
4创建一个dcache硬件设备
fdisk -l fdisk /dev/vdb n,e,ent,ent,ent,w
blockdev --getsize /dev/vdc
echo 0 62914560 cache /dev/sdc /dev/sdb 0 8 65536 256 1 | dmsetup create dcache
报错
root@demo-2:~# echo 0 62914560 dcache /dev/vdc /dev/vdb 0 8 65536 256 1 | dmsetup create dcache Message from syslogd@demo-2 at Dec 3 07:47:05 ... kernel:[951389.165407] Kernel panic - not syncing: VERIFY: assertion (spin_is_locked(&dmc->lock)) failed at /root/cc-threadpool/test3/dcache.c (227) Message from syslogd@demo-2 at Dec 3 07:47:05 ... kernel:[951389.165408]
5,挂载
echo 0 62914560 dcache /dev/vdc /dev/vdb | dmsetup create dcache cd /dev/mapper/
6,卸载驱动
root@demo-2:~# sudo umount /dev/mapper/dcache sudo: unable to resolve host demo-2 umount: /mnt/dmcache: device is busy. (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1)) root@demo-2:~# fuser -m /mnt/dmcache/ /mnt/dmcache: 10375c root@demo-2:~# ps aux|grep 10375c root 11539 0.0 0.0 7832 880 pts/1 R+ 07:08 0:00 grep 10375c root@demo-2:~# kill -9 10375
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