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#ifndef IOOPS_H
#define IOOPS_H

#include <sys/types.h>

extern int open_or_die(const char *file, int flags);
extern int open_or_die_m(const char *file, int flags, mode_t mode);
extern int dup_or_die(int oldfd);
extern void dup2_or_die(int oldfd, int newfd);
extern void create_or_die(const char *file, mode_t mode);
extern int mkostemp_or_die(char *templ, int flags);
extern int tun_open_or_die(const char *name, int type);
extern void pipe_or_die(int pipefd[2], int flags);
extern ssize_t read_or_die(int fd, void *buf, size_t count);
extern ssize_t write_or_die(int fd, const void *buf, size_t count);
extern int read_blob_or_die(const char *file, void *blob, size_t count);
extern int write_blob_or_die(const char *file, const void *blob, size_t count);

#endif /* IOOPS_H */
e='1'>ssdiff
authorSteven Rostedt (VMware) <rostedt@goodmis.org>2017-01-30 19:27:10 -0500
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2017-01-31 09:13:49 -0500
commit79c6f448c8b79c321e4a1f31f98194e4f6b6cae7 (patch)
tree370efda701f03cccf21e02bb1fdd3b852547d75c /tools/perf/builtin-top.c
parent0c744ea4f77d72b3dcebb7a8f2684633ec79be88 (diff)
tracing: Fix hwlat kthread migration
The hwlat tracer creates a kernel thread at start of the tracer. It is pinned to a single CPU and will move to the next CPU after each period of running. If the user modifies the migration thread's affinity, it will not change after that happens. The original code created the thread at the first instance it was called, but later was changed to destroy the thread after the tracer was finished, and would not be created until the next instance of the tracer was established. The code that initialized the affinity was only called on the initial instantiation of the tracer. After that, it was not initialized, and the previous affinity did not match the current newly created one, making it appear that the user modified the thread's affinity when it did not, and the thread failed to migrate again. Cc: stable@vger.kernel.org Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'tools/perf/builtin-top.c')