database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-08-27 13:04:36 +03:00
Code Activity

Bug#38477: my_pthread_setprio can change dispatch class on Solaris, not just priority

Browse Source 
The problem is that the function used by the server to increase
the thread's priority (pthread_setschedparam) has the unintended
side-effect of changing the calling thread scheduling policy,
possibly overwriting a scheduling policy set by a sysadmin.

The solution is to rely on the pthread_setschedprio function, if
available, as it only changes the scheduling priority and does not
change the scheduling policy. This function is usually available on
Solaris and Linux, but it use won't work by default on Linux as the
the default scheduling policy only accepts a static priority 0 -- this
is acceptable for now as priority changing on Linux is broken anyway.
This commit is contained in:
Davi Arnaut
2008-10-15 19:28:26 -03:00
parent 28f29b7313
commit 459b8b3dd2
2 changed files with 3 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/my_pthread.h
View File

@@ -279,6 +279,8 @@ int sigwait(sigset_t *setp, int *sigp); /* Use our implemention */
#define my_pthread_setprio(A,B) pthread_setprio_np((A),(B))
#elif defined(HAVE_PTHREAD_SETPRIO)
#define my_pthread_setprio(A,B) pthread_setprio((A),(B))
#elif defined(HAVE_PTHREAD_SETSCHEDPRIO)
#define my_pthread_setprio(A,B) pthread_setschedprio((A),(B))
#else
extern void my_pthread_setprio(pthread_t thread_id,int prior);
#endif