Subject: + exec-avoid-propagating-pf_no_setaffinity-into-userspace-child.patch added to -mm tree
To: zhang.yi20@xxxxxxxxxx,oleg@xxxxxxxxxx,tj@xxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Mon, 13 Jan 2014 12:03:12 -0800
The patch titled
From: zhang.yi20@xxxxxxxxxx
has been added to the -mm tree. Its filename is
exec-avoid-propagating-pf_no_setaffinity-into-userspace-child.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/exec-avoid-propagating-pf_no_setaffinity-into-userspace-child.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/exec-avoid-propagating-pf_no_setaffinity-into-userspace-child.patch
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------------------------------------------------------
From: zhang.yi20@xxxxxxxxxx
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 <zhang.yi20@xxxxxxxxxx>
Acked-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/exec.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN fs/exec.c~exec-avoid-propagating-pf_no_setaffinity-into-userspace-child fs/exec.c
--- a/fs/exec.c~exec-avoid-propagating-pf_no_setaffinity-into-userspace-child
+++ a/fs/exec.c
@@ -1087,8 +1087,8 @@ int flush_old_exec(struct linux_binprm *
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;
_
Patches currently in -mm which might be from zhang.yi20@xxxxxxxxxx are
exec-avoid-propagating-pf_no_setaffinity-into-userspace-child.patch
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