diff options
| author | Oleg Nesterov <oleg@tv-sign.ru> | 2006-09-29 02:00:52 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-29 09:18:18 -0700 |
| commit | 5b160f5ecd2f1b6df2e0015dc1f319c8ef803d62 (patch) | |
| tree | ff7f77b4178299146d6450f01f5d1da769c3fda9 | |
| parent | 1c573afebc6213e4372e0d8352034c23d5262e1f (diff) | |
[PATCH] copy_process: cosmetic ->ioprio tweak
copy_process:
// holds tasklist_lock + ->siglock
/*
* inherit ioprio
*/
p->ioprio = current->ioprio;
Why? ->ioprio was already copied in dup_task_struct(). I guess this is
needed to ensure that the child can't escape
sys_ioprio_set(IOPRIO_WHO_{PGRP,USER}), yes?
In that case we don't need ->siglock held, and the comment should be
updated.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Jens Axboe <axboe@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | kernel/fork.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index bca6ce6d3ded..1c999f3e0b47 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1150,7 +1150,6 @@ static struct task_struct *copy_process(unsigned long clone_flags, /* Our parent execution domain becomes current domain These must match for thread signalling to apply */ - p->parent_exec_id = p->self_exec_id; /* ok, now we should be set up.. */ @@ -1173,6 +1172,9 @@ static struct task_struct *copy_process(unsigned long clone_flags, /* Need tasklist lock for parent etc handling! */ write_lock_irq(&tasklist_lock); + /* for sys_ioprio_set(IOPRIO_WHO_PGRP) */ + p->ioprio = current->ioprio; + /* * The task hasn't been attached yet, so its cpus_allowed mask will * not be changed, nor will its assigned CPU. @@ -1232,11 +1234,6 @@ static struct task_struct *copy_process(unsigned long clone_flags, } } - /* - * inherit ioprio - */ - p->ioprio = current->ioprio; - if (likely(p->pid)) { add_parent(p); if (unlikely(p->ptrace & PT_PTRACED)) |