Messages in this thread | | | Date | Fri, 29 Jun 2012 09:33:11 +0100 | From | Al Viro <> | Subject | Re: [PATCH 0/4] Was: deferring __fput() |
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On Fri, Jun 29, 2012 at 01:30:38AM -0400, Mimi Zohar wrote: > On Thu, 2012-06-28 at 05:38 +0100, Al Viro wrote: > > On Wed, Jun 27, 2012 at 08:37:21PM +0200, Oleg Nesterov wrote: > > > On 06/25, Oleg Nesterov wrote: > > > > > > > > And if it always takes ->pi_lock we do not need the new PF_ or something > > > > else, exit_task_work() can set task->task_works = NO_MORE under ->pi_lock > > > > (task_work_run() can check PF_EXITING), and task_work_add() ensures that > > > > task_works != NO_MORE. > > > > > > > > What do you think? > > > > > > It is not clear to me if you agree or not. So I am simply sending the > > > patches I have. > > > > > > Feel free to ignore or re-do. > > > > > > Seriously, why should we add 2 pointers into task_struct? Sure, this > > > is minor, but still... But perhaps task_work.c should not play tricks > > > with the circular list, task_work_run() can reverse the list as you > > > initially suggested. > > > > > > Also, I am not sure about "define rcu_head callback_head", this series > > > doesn't do this. But again, up to you. > > > > Umm... FWIW, my variant circa yesterday is in vfs.git#untested; it seems to survive > > on uml/amd64 at least. I'll look through your patches and see what can be nicked. > > The list removal logics in mine looks really ugly ;-/ > > Still failing to boot. Fails to boot starting with commit "b24dfa6 > switch fput to task_work_add".
Details, please... .config, root fs type, etc. Failed execve() of init is, unfortunately, not too informative...
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