The patch titled Subject: mm: call complete_vfork_done() after clearing child_tid and flushing rss-counters has been added to the -mm tree. Its filename is mm-call-complete_vfork_done-after-clearing-child_tid-and-flushing-rss-counters.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxx> Subject: mm: call complete_vfork_done() after clearing child_tid and flushing rss-counters Child should wake up the parent from vfork() only after finishing all operations with shared mm. There is no sense in using CLONE_CHILD_CLEARTID together with CLONE_VFORK, but it looks more accurate now. Signed-off-by: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxx> Cc: Oleg Nesterov <oleg@xxxxxxxxxx> Cc: Hugh Dickins <hughd@xxxxxxxxxx> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> Cc: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxx> Cc: Markus Trippelsdorf <markus@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- kernel/fork.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff -puN kernel/fork.c~mm-call-complete_vfork_done-after-clearing-child_tid-and-flushing-rss-counters kernel/fork.c --- a/kernel/fork.c~mm-call-complete_vfork_done-after-clearing-child_tid-and-flushing-rss-counters +++ a/kernel/fork.c @@ -756,9 +756,6 @@ void mm_release(struct task_struct *tsk, /* Get rid of any cached register state */ deactivate_mm(tsk, mm); - if (tsk->vfork_done) - complete_vfork_done(tsk); - /* * If we're exiting normally, clear a user-space tid field if * requested. We leave this alone when dying by signal, to leave @@ -787,6 +784,13 @@ void mm_release(struct task_struct *tsk, */ if (mm) sync_mm_rss(mm); + + /* + * All done, finally we can wake up parent and return this mm to him. + * Also kthread_stop() uses this completion for synchronization. + */ + if (tsk->vfork_done) + complete_vfork_done(tsk); } /* _ Subject: Subject: mm: call complete_vfork_done() after clearing child_tid and flushing rss-counters Patches currently in -mm which might be from khlebnikov@xxxxxxxxxx are linux-next.patch mm-correctly-synchronize-rss-counters-at-exit-exec.patch mm-correctly-synchronize-rss-counters-at-exit-exec-fix.patch mm-correctly-synchronize-rss-counters-at-exit-exec-set-task-exit-code-before-complete_vfork_done.patch mm-vmscan-remove-lumpy-reclaim.patch mm-vmscan-remove-reclaim_mode_t.patch mm-remove-swap-token-code.patch mm-memcg-scanning_global_lru-means-mem_cgroup_disabled.patch mm-memcg-move-reclaim_stat-into-lruvec.patch mm-push-lru-index-into-shrink_active_list.patch mm-push-lru-index-into-shrink_active_list-fix.patch mm-mark-mm-inline-functions-as-__always_inline.patch mm-remove-lru-type-checks-from-__isolate_lru_page.patch mm-memcg-kill-mem_cgroup_lru_del.patch mm-memcg-use-vm_swappiness-from-target-memory-cgroup.patch mm-call-complete_vfork_done-after-clearing-child_tid-and-flushing-rss-counters.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html