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1d958980bd
Fix SMP related bugs
* sched/sched: Fix a deadlock in SMP mode
Two months ago, I introduced sched_tasklist_lock() and
sched_tasklist_unlock() to protect tasklists in SMP mode.
Actually, this change works pretty well for HTTP audio
streaming aging test with lc823450-xgevk.
However, I found a deadlock in the scheduler when I tried
similar aging tests with DVFS autonomous mode where CPU
clock speed changed based on cpu load. In this case, call
sequences were as follows;
cpu1: sched_unlock()->sched_mergepending()->sched_addreadytorun()->up_cpu_pause()
cpu0: sched_lock()->sched_mergepending()
To avoid this deadlock, I added sched_tasklist_unlock() when calling
up_cpu_pause() and sched_addreadytorun(). Also, added
sched_tasklist_lock() after the call.
Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>
* libc: Add critical section in lib_filesem.c for SMP
To set my_pid into fs_folder atomically in SMP mode,
critical section API must be used.
Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>
* mm: Add critical section in mm_sem.c for SMP
To set my_pid into mm_folder atomically in SMP mode,
critical section API must be used.
Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>
* net: Add critical section in net_lock.c for SMP
To set my pid (me) into fs_folder atomically in SMP mode,
critical section API must be used.
Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>
Approved-by: Gregory Nutt <gnutt@nuttx.org>
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| .. | ||
| Kconfig | ||
| lib_crc8.c | ||
| lib_crc16.c | ||
| lib_crc32.c | ||
| lib_crc64.c | ||
| lib_debug.c | ||
| lib_dumpbuffer.c | ||
| lib_filesem.c | ||
| lib_ioctl.c | ||
| lib_kbddecode.c | ||
| lib_kbdencode.c | ||
| lib_match.c | ||
| lib_mkfifo.c | ||
| lib_ncompress.c | ||
| lib_sendfile.c | ||
| lib_slcddecode.c | ||
| lib_slcdencode.c | ||
| lib_stream.c | ||
| lib_streamsem.c | ||
| lib_tea_decrypt.c | ||
| lib_tea_encrypt.c | ||
| lib_uadd32x64.c | ||
| lib_uadd64.c | ||
| lib_umul32.c | ||
| lib_umul32x64.c | ||
| lib_umul64.c | ||
| lib_usub64.c | ||
| lib_usub64x32.c | ||
| lib_utsname.c | ||
| lib_xorshift128.c | ||
| Make.defs | ||