* get a deadlock when insmod ftl
@ 2017-02-23 12:59 Gu Zheng
0 siblings, 0 replies; only message in thread
From: Gu Zheng @ 2017-02-23 12:59 UTC (permalink / raw)
To: computersforpeace, dwmw2
Cc: linux-mtd, miaoxie, guohanjun, Zhaohongjiang, yi.zhang@huawei.com
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hi Brian Norris & David Woodhouse:
we found this deadlock with kernel version 4.1. then we found it maybe also exist after saw the code on 4.10.
when insmod the ftl module, which register_mtd_blktrans.
-> register_mtd_blktrans()
-> mutex_lock(&mtd_table_mutex)
-> ftl_add_mtd()
-> add_mtd_blktrans_dev()
-> device_add_disk()
-> register_disk()
-> blkdev_get()
-> __blkdev_get()
-> blktrans_open()
-> mutex_lock(&mtd_table_mutex); !!!!!!!
the hung task log in attachment.
do you have any good ideas?
thanks,thanks!
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2017-02-23 12:59 get a deadlock when insmod ftl Gu Zheng
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