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Commit b88fae64 authored by Zhang Yi's avatar Zhang Yi Committed by Linus Torvalds
Browse files

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: default avatarZhang Yi <zhang.yi20@zte.com.cn>
Acked-by: default avatarOleg Nesterov <oleg@redhat.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 8d38f203

fs/exec.c

+2 −2
Original line number Diff line number Diff line
@@ -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;