reason:
We can utilize percpu storage to hold information about the
current running task. If we intend to implement this feature, we would
need to define two macros that help us manage this percpu information
effectively.
up_this_task: This macro is designed to read the contents of the percpu
register to retrieve information about the current
running task.This allows us to quickly access
task-specific data without having to disable interrupts,
access global variables and obtain the current cpu index.
up_update_task: This macro is responsible for updating the contents of
the percpu register.It is typically called during
initialization or when a context switch occurs to ensure
that the percpu register reflects the information of the
newly running task.
Configuring NuttX and compile:
$ ./tools/configure.sh -l qemu-armv8a:nsh_smp
$ make
Running with qemu
$ qemu-system-aarch64 -cpu cortex-a53 -smp 4 -nographic \
-machine virt,virtualization=on,gic-version=3 \
-net none -chardev stdio,id=con,mux=on -serial chardev:con \
-mon chardev=con,mode=readline -kernel ./nuttx
Signed-off-by: hujun5 <hujun5@xiaomi.com>
origoffset represent the offset of current node
offset represent the offset of the file when
the current node is a soft or hard link
Signed-off-by: guohao15 <guohao15@xiaomi.com>
The man manual describes that poll only has EFAULT, EINTR, EINVAL, and ENOMEM return values.
If a file returns an error, the POLLERR event should be set and OK should be returned
https://man7.org/linux/man-pages/man2/poll.2.html
When using libuv to poll the socket, the socket poll returned an EBUSY error, causing libuv to abort.
The expected logic should be to return OK, allowing libuv to notify the event listener that the POLLERR event occurred.
Signed-off-by: yinshengkai <yinshengkai@xiaomi.com>
Signed-off-by: ligd <liguiding1@xiaomi.com>
timeout is a type of int
in MSEC2TICK, timeout may be multiplied by USEC_PER_MSEC
and the result may be out of range of int
Besides, this will induce following ERROR while running simulator:
vfs/fs_poll.c:498:38: runtime error: signed integer overflow:
19768268 * 1000 cannot be represented in type 'int'
Signed-off-by: zhengyu9 <zhengyu9@xiaomi.com>
Signed-off-by: ligd <liguiding1@xiaomi.com>
v9fs/virtio_9p.c:223:3: error: too few arguments to function 'virtio_negotiate_features'
223 | virtio_negotiate_features(vdev, 1 << VIRTIO_9P_MOUNT_TAG);
v9fs/virtio_9p.c:245:9: error: too few arguments to function 'virtio_create_virtqueues'
245 | ret = virtio_create_virtqueues(vdev, 0, 1, vqname, callback);
Signed-off-by: Yongrong Wang <wangyongrong@xiaomi.com>
In ./fs/inode directory, the variable name FAR struct inode *node is named inconsistently, with some using node and others using inode. To facilitate understanding, we will standardize the naming to FAR struct inode *inode.
Signed-off-by: cuiziwei <cuiziwei@xiaomi.com>
This extension for the event group, to establish a connection between
named event groups and a task. The task may reference the event group
associated with a VFS-based name. Then the event group can be used
in subsequent calls to nxevent_wait() or nxevent_post().
This is an internal OS interface and should not be used by applications.
Signed-off-by: fangxinyong <fangxinyong@xiaomi.com>
ligd