After the number of threads exceeds the array size, it will not be displayed.
Any number of threads can be displayed using dynamic adaptation
Signed-off-by: yinshengkai <yinshengkai@xiaomi.com>
Summary:
- I noticed that nfsmount does not work due to the recent
changes on sockaddr_storage alignment.
- This commit fixes this issue.
Impact:
- None
Testing:
- Tested with sabre-6quad:netnsh_smp (QEMU)
Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>
This is a memory monitoring interface implemented with reference to Linux's PSI (Pressure Stall Information),
which can send notifications when the system's remaining memory is below the threshold.
The following example code sets two different thresholds.
When the system memory is below 10MB, a notification is triggered.
When the system memory is below 20 MB, a notification (POLLPRI event) is triggered every 1s.
```
int main(int argc, FAR char *argv[])
{
struct pollfd fds[2];
int ret;
if (argc == 2)
{
char *ptr = malloc(1024*1024*atoi(argv[1]));
printf("Allocating %d MB\n", atoi(argv[1]));
ptr[0] = 0;
return 0;
}
fds[0].fd = open("/proc/pressure/memory", O_RDWR);
fds[1].fd = open("/proc/pressure/memory", O_RDWR);
fds[0].events = POLLPRI;
fds[1].events = POLLPRI;
dprintf(fds[0].fd, "%llu -1", 1024LLU*1024 * 10);
dprintf(fds[1].fd, "%llu 1000000", 1024LLU*1024 * 20);
while (1)
{
ret = poll(fds, 2, -1);
if (ret > 0)
{
printf("Memory pressure: POLLPRI, %d\n", ret);
}
}
return 0;
}
```
https://docs.kernel.org/accounting/psi.html
Signed-off-by: yinshengkai <yinshengkai@xiaomi.com>
For some case, need large files from tmpfs or shmfs, will lead to high
pressure on memory fragments, add an optional fs_heap with independent
heap will benifit for memory fragments issue.
Signed-off-by: buxiasen <buxiasen@xiaomi.com>
[Desc]:We need to check the parameter passed to the kmm_zalloc(size_t) function.
If it exceeds the limit of size_t, we need to return an error directly to avoid further errors.
Signed-off-by: pengyinjie <pengyinjie@xiaomi.com>
Summary:
Indicate whether the file is currently locked by adding a new field locked to filep.
0 - Unlocked
1 - Locked
The status of the filep at close is used to determine whether to continue with the following procedure.
Optimizing performance:
Before
Time taken to close the file: 33984 nsec
After
Time taken to close the file: 23744 nsec
Improvement of about 10 msec
Signed-off-by: chenrun1 <chenrun1@xiaomi.com>
Summary:
In the x86 environment, memory does not necessarily start at 0, so when end is 0x0, start = end + 1, and then determine the contents of start, it will cause x86 to cause a crash when accessing an illegal address.
This problem does not occur in the arm environment because arm starts at 0x0, so the content of the 0x1 address is “\0”.
Signed-off-by: chenrun1 <chenrun1@xiaomi.com>
Summary:
1.The relpath information is stored in the fid structure
2.The relative path information is only saved in the client. When the server changes, the relpath saved in the fid will not change.
Signed-off-by: chenrun1 <chenrun1@xiaomi.com>
When sending FIOC_XXXLK to hostfs, hostfs will return -1 by default. For ioctl statements, incompatible instructions should be processed as -ENOTTY by default
Signed-off-by: chenrun1 <chenrun1@xiaomi.com>
When handling errors through ioctl, the error returned by the server is always 0 on the client, because cookie.result is not assigned, the error returned should be in msg->result
Signed-off-by: chenrun1 <chenrun1@xiaomi.com>
