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0f7e663dea
tt-mode closes switch_pipes in exit_thread_tt and kills processes in switch_to_tt, if the exit_state is EXIT_DEAD or EXIT_ZOMBIE. In very rare cases the exiting process can be scheduled out after having set exit_state and closed switch_pipes (from release_task it calls proc_pid_flush, which might sleep). If this process is to be restarted, UML failes in switch_to_tt with: write of switch_pipe failed, err = 9 We fix this by closing switch_pipes not in exit_thread_tt, but later in release_thread_tt. Additionally, we set switch_pipe[0] = 0 after closing. switch_to_tt must not kill "from" process depending on its exit_state, but must kill it after release_thread was processed only, so it examines switch_pipe[0] for its decision. Signed-off-by: Bodo Stroesser <bstroesser@fujitsu-siemens.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
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| .. | ||
| skas | ||
| tt | ||
| checksum.c | ||
| config.c.in | ||
| dyn.lds.S | ||
| exec_kern.c | ||
| exitcode.c | ||
| gmon_syms.c | ||
| gprof_syms.c | ||
| helper.c | ||
| init_task.c | ||
| initrd_kern.c | ||
| initrd_user.c | ||
| irq_user.c | ||
| irq.c | ||
| ksyms.c | ||
| main.c | ||
| Makefile | ||
| mem_user.c | ||
| mem.c | ||
| physmem.c | ||
| process_kern.c | ||
| process.c | ||
| ptrace.c | ||
| reboot.c | ||
| resource.c | ||
| sigio_kern.c | ||
| sigio_user.c | ||
| signal_kern.c | ||
| signal_user.c | ||
| smp.c | ||
| syscall_kern.c | ||
| syscall_user.c | ||
| sysrq.c | ||
| tempfile.c | ||
| time_kern.c | ||
| time.c | ||
| tlb.c | ||
| trap_kern.c | ||
| trap_user.c | ||
| tty_log.c | ||
| uaccess_user.c | ||
| um_arch.c | ||
| umid.c | ||
| uml.lds.S | ||
| user_util.c | ||
| vmlinux.lds.S | ||