GUIDINGLI opened a new pull request, #6671:
URL: https://github.com/apache/incubator-nuttx/pull/6671

   ## Summary
   
   rpmsgfs: improve file read & write performance
   rpmsgfs: cache statfs result in case of deadlock
   
       rptun: msg from other cpu
       [ap] [ 5] [<0x2c353768>] arm_switchcontext+0xc/0x10
       [ap] [ 5] [<0x2c322266>] sem_wait+0x5a/0xbc
       [ap] [ 5] [<0x2c7400a8>] inode_semtake+0x24/0x5c
       [ap] [ 5] [<0x2c74087a>] inode_release+0x6/0x60
       [ap] [ 5] [<0x2c741284>] file_close+0x18/0x44
       [ap] [ 5] [<0x2c74fb06>] rpmsgfs_close_handler+0x86/0xe4
       [ap] [ 5] [<0x2c75b8de>] rpmsg_virtio_rx_callback+0xba/0x1b4
       [ap] [ 5] [<0x2c75af70>] rproc_virtio_notified+0x44/0x5c
       [ap] [ 5] [<0x2c75a93c>] remoteproc_get_notification+0x1c/0x2c
       [ap] [ 5] [<0x2c335a08>] rptun_thread+0x74/0x208
       [ap] [ 5] [<0x2c323e72>] nxtask_start+0x3a/0x60
       
       nsh: send msg to other cpu with inode lock
       [ap] [10] [<0x2c353768>] arm_switchcontext+0xc/0x10
       [ap] [10] [<0x2c3221b2>] nxsem_wait_uninterruptible+0x6e/0xc8
       [ap] [10] [<0x2c74e498>] rpmsgfs_send_recv.constprop.0+0x78/0xc0
       [ap] [10] [<0x2c74ebc0>] rpmsgfs_client_statfs+0x50/0x80
       [ap] [10] [<0x2c3221ca>] nxsem_wait_uninterruptible+0x86/0xc8
       [ap] [10] [<0x2c74da78>] rpmsgfs_statfs+0x28/0x50
       [ap] [10] [<0x2c74534e>] mountpoint_filter+0x66/0x90
       [ap] [10] [<0x2c740016>] foreach_inodelevel+0x66/0x88
       [ap] [10] [<0x2c73fffa>] foreach_inodelevel+0x4a/0x88
       [ap] [10] [<0x2c740062>] foreach_inode+0x2a/0x48
       [ap] [10] [<0x2c745388>] foreach_mountpoint+0x10/0x20
       [ap] [10] [<0x2c745606>] mount_read+0x36/0x70
       [ap] [10] [<0x2c742a34>] read+0x30/0x5c
       [ap] [10] [<0x2c371096>] nsh_catfile+0x36/0x140
       [ap] [10] [<0x2c36d01a>] nsh_parse_command+0x7fe/0xc54
       [ap] [10] [<0x2c370f92>] nsh_session+0x66/0x134
       [ap] [10] [<0x2c3721a4>] nsh_consolemain+0x2c/0x44
       [ap] [10] [<0x2c374fde>] nsh_main+0x2a/0x4c
       [ap] [10] [<0x2c33f7f8>] lib_cxx_initialize+0x24/0x48
       [ap] [10] [<0x2c34274a>] nxtask_startup+0x12/0x24
       [ap] [10] [<0x2c323e7e>] nxtask_start+0x46/0x60
   
   
   ## Impact
   rpmsgfs
   
   ## Testing
   VELA
   


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