dongjiuzhu1 09a9611ae9 fs/inode: using rwsem lock as inode_lock to avoid deadlock ...

Example:
When executing "df -h" on Core A to view mount information, this
process will traverse inode nodes, thereby holding the inode_lock.
Since the inode type of the mount point may be rpmsgfs, it will fetch statfs
information from another Core B.

Meanwhile, rcS on Core B needs to obtain file information from Core A,
which will be achieved by fetching stat information through rpmsgfs.
When this message arrives at Core A, a deadlock can occur between Core A's
rptun ap and nsh task.

However, both of these places involve read operations only, thus a reader-writer lock
can be utilized to prevent such a deadlock.

Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>

2024-10-02 01:56:46 +08:00

..

CMakeLists.txt

build: add initial cmake build system

2023-07-08 13:50:48 +08:00

Kconfig

mqueue: Rename FS_MQUEUE_MPATH to FS_MQUEUE_VFS_PATH

2022-02-05 23:58:01 +01:00

Make.defs

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mq_close.c

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mq_open.c

fs/inode: using rwsem lock as inode_lock to avoid deadlock

2024-10-02 01:56:46 +08:00

mq_unlink.c

fs/inode: using rwsem lock as inode_lock to avoid deadlock

2024-10-02 01:56:46 +08:00

mqueue.h

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