From b88fae644e5e3922251a4b242f435f5e3b49c381 Mon Sep 17 00:00:00 2001 From: Zhang Yi Date: Thu, 23 Jan 2014 15:55:57 -0800 Subject: exec: avoid propagating PF_NO_SETAFFINITY into userspace child Userspace process doesn't want the PF_NO_SETAFFINITY, but its parent may be a kernel worker thread which has PF_NO_SETAFFINITY set, and this worker thread can do kernel_thread() to create the child. Clearing this flag in usersapce child to enable its migrating capability. Signed-off-by: Zhang Yi Acked-by: Oleg Nesterov Cc: Tejun Heo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/exec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/exec.c b/fs/exec.c index 493b102a27c..44218a7267b 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -1087,8 +1087,8 @@ int flush_old_exec(struct linux_binprm * bprm) bprm->mm = NULL; /* We're using it now */ set_fs(USER_DS); - current->flags &= - ~(PF_RANDOMIZE | PF_FORKNOEXEC | PF_KTHREAD | PF_NOFREEZE); + current->flags &= ~(PF_RANDOMIZE | PF_FORKNOEXEC | PF_KTHREAD | + PF_NOFREEZE | PF_NO_SETAFFINITY); flush_thread(); current->personality &= ~bprm->per_clear; -- cgit v1.2.3