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parasite: send PARASITE_CMD_FINI before resuming the target process

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The control socket has enough buffer for one command and the target
process will not wait a new command, so we will avoid extra context
switches.

Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Andrey Vagin
2014-09-17 19:12:02 +04:00
committed by Pavel Emelyanov
parent 8b9e18f07b
commit e46a9f6bfc
1 changed files with 5 additions and 5 deletions
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10
parasite-syscall.c
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@@ -863,17 +863,17 @@ static int parasite_fini_seized(struct parasite_ctl *ctl)
return -1;
}
ret = __parasite_execute_daemon(PARASITE_CMD_FINI, ctl);
close_safe(&ctl->tsock);
if (ret)
return -1;
ret = ptrace(PTRACE_SYSCALL, pid, NULL, NULL);
if (ret) {
pr_perror("ptrace");
return -1;
}
ret = __parasite_execute_daemon(PARASITE_CMD_FINI, ctl);
close_safe(&ctl->tsock);
if (ret)
return -1;
if (parasite_stop_on_syscall(1, __NR_rt_sigreturn))
return -1;