From: Oleg Nesterov <oleg@redhat.com>
To: Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>
Cc: Tejun Heo <tj@kernel.org>,
"Nikita V. Youshchenko" <nyoushchenko@mvista.com>,
Matt Fleming <matt@console-pimps.org>,
linux-kernel@vger.kernel.org
Subject: [PATCH 0/3] do_sigtimedwait() needs retarget_shared_pending()
Date: Sat, 23 Apr 2011 19:59:01 +0200 [thread overview]
Message-ID: <20110423175901.GA484@redhat.com> (raw)
In-Reply-To: <BANLkTikkYapz+qiJ0skx9ykz7TT9vmTVQw@mail.gmail.com>
On 04/18, Linus Torvalds wrote:
>
> In that case, this series looks fairly ok to me. I'm still unsure
> whether it's _required_,
Indeed! It is a bit annoying, I am not sure too. This "problem" is
very, very, old. And nobody complained so far. Except, this _might_
explain the hang reported by Nikita.
OTOH. Probably set_current_blocked() makes sense anyway, it would be
nice to require that nobody can play with ->blocked directly. We can
reconsider retarget_shared_pendind() or simply kill it if it adds the
noticeable overhead in practice.
So, I'll assume we need this changes. Correctness is always good. All
further changes should be simple and straightforward, I am going to
trim CC. Except sys_rt_sigtimedwait() is nasty, we need another helper
for simplicity.
If nobody objects, I'll send at lot of other "needs set_current_blocked"
simple patches to Andrew.
Oleg.
next prev parent reply other threads:[~2011-04-23 17:59 UTC|newest]
Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-18 13:44 [RFC PATCH v2 0/7] signal: sigprocmask fixes Oleg Nesterov
2011-04-18 13:44 ` [PATCH v2 1/7] signal: introduce retarget_shared_pending() Oleg Nesterov
2011-04-22 12:04 ` Matt Fleming
2011-04-25 10:49 ` Tejun Heo
2011-04-18 13:45 ` [PATCH v2 2/7] signal: retarget_shared_pending: consider shared/unblocked signals only Oleg Nesterov
2011-04-22 12:22 ` Matt Fleming
2011-04-25 10:52 ` Tejun Heo
2011-04-25 15:20 ` Oleg Nesterov
2011-04-25 16:19 ` Tejun Heo
2011-04-25 17:02 ` Oleg Nesterov
2011-04-25 17:11 ` Tejun Heo
2011-04-26 19:45 ` Oleg Nesterov
2011-04-28 15:26 ` [PATCHSET] signals-review branch Oleg Nesterov
2011-04-30 12:51 ` Tejun Heo
2011-04-18 13:45 ` [PATCH v2 3/7] signal: retarget_shared_pending: optimize while_each_thread() loop Oleg Nesterov
2011-04-22 12:26 ` Matt Fleming
2011-04-25 11:03 ` Tejun Heo
2011-04-18 13:45 ` [PATCH v2 4/7] signal: sigprocmask: narrow the scope of ->siglock Oleg Nesterov
2011-04-22 12:31 ` Matt Fleming
2011-04-25 11:05 ` Tejun Heo
2011-04-18 13:45 ` [PATCH v2 5/7] signal: sigprocmask() should do retarget_shared_pending() Oleg Nesterov
2011-04-22 12:46 ` Matt Fleming
2011-04-25 11:14 ` Tejun Heo
2011-04-18 13:46 ` [PATCH v2 6/7] x86: signal: handle_signal() should use set_current_blocked() Oleg Nesterov
2011-04-22 13:45 ` Matt Fleming
2011-04-25 11:19 ` Tejun Heo
2011-04-18 13:46 ` [PATCH v2 7/7] x86: signal: sys_rt_sigreturn() " Oleg Nesterov
2011-04-22 14:14 ` Matt Fleming
2011-04-23 18:12 ` Oleg Nesterov
2011-04-25 11:21 ` Tejun Heo
2011-04-18 13:47 ` [PATCH v2 8/7] signal: cleanup sys_rt_sigprocmask() Oleg Nesterov
2011-04-22 14:30 ` Matt Fleming
2011-04-23 18:20 ` Oleg Nesterov
2011-04-23 18:47 ` Matt Fleming
2011-04-25 11:26 ` Tejun Heo
2011-04-18 17:16 ` [RFC PATCH v2 0/7] signal: sigprocmask fixes Linus Torvalds
2011-04-18 17:32 ` Oleg Nesterov
2011-04-18 17:40 ` Linus Torvalds
2011-04-23 17:59 ` Oleg Nesterov [this message]
2011-04-23 17:59 ` [PATCH 1/3] signal: sys_rt_sigtimedwait: simplify the timeout logic Oleg Nesterov
2011-04-25 11:37 ` Tejun Heo
2011-04-25 17:26 ` Oleg Nesterov
2011-04-25 17:34 ` Linus Torvalds
2011-04-25 17:56 ` Oleg Nesterov
2011-04-25 19:38 ` Linus Torvalds
2011-04-26 10:18 ` Matt Fleming
2011-04-23 17:59 ` [PATCH 2/3] signal: introduce do_sigtimedwait() to factor out compat/native code Oleg Nesterov
2011-04-25 11:39 ` Tejun Heo
2011-04-25 11:49 ` Tejun Heo
2011-04-25 15:33 ` Oleg Nesterov
2011-04-25 16:25 ` Tejun Heo
2011-04-26 10:28 ` Matt Fleming
2011-04-23 18:00 ` [PATCH 3/3] signal: do_sigtimedwait() needs retarget_shared_pending() Oleg Nesterov
2011-04-25 11:52 ` Tejun Heo
2011-04-25 16:01 ` Oleg Nesterov
2011-04-25 16:27 ` Tejun Heo
2011-04-25 17:07 ` Oleg Nesterov
2011-04-25 17:12 ` Tejun Heo
2011-04-26 10:40 ` Matt Fleming
2011-04-26 10:42 ` Matt Fleming
2011-04-26 19:48 ` [PATCH v2 0/6] sigtimedwait/sigprocmask need retarget_shared_pending() Oleg Nesterov
2011-04-26 19:48 ` [PATCH v2 1/6] signal: sys_rt_sigtimedwait: simplify the timeout logic Oleg Nesterov
2011-04-26 19:49 ` [PATCH v2 2/6] signal: introduce do_sigtimedwait() to factor out compat/native code Oleg Nesterov
2011-04-27 10:09 ` Tejun Heo
2011-04-27 21:24 ` Matt Fleming
2011-05-11 16:21 ` Mike Frysinger
2011-05-12 18:54 ` Oleg Nesterov
2011-05-13 16:44 ` [PATCH] signal: trivial, fix the "timespec declared inside parameter list" warning Oleg Nesterov
2011-05-13 18:09 ` Mike Frysinger
2011-05-16 12:57 ` Oleg Nesterov
2011-05-16 12:57 ` [PATCH v2] " Oleg Nesterov
2011-05-16 17:39 ` Mike Frysinger
2011-05-18 23:37 ` Andrew Morton
2011-05-19 18:19 ` Oleg Nesterov
2011-05-19 19:21 ` Mike Frysinger
2011-04-26 19:49 ` [PATCH v2 3/6] signal: do_sigtimedwait() needs retarget_shared_pending() Oleg Nesterov
2011-04-26 19:49 ` [PATCH v2 4/6] signal: cleanup sys_sigprocmask() Oleg Nesterov
2011-04-27 10:12 ` Tejun Heo
2011-04-27 21:31 ` Matt Fleming
2011-04-26 19:50 ` [PATCH v2 5/6] signal: sys_sigprocmask() needs retarget_shared_pending() Oleg Nesterov
2011-04-26 21:43 ` Linus Torvalds
2011-04-27 12:57 ` Oleg Nesterov
2011-04-27 13:04 ` Tejun Heo
2011-05-01 20:07 ` [PATCH v2 0/1] " Oleg Nesterov
2011-05-01 20:08 ` [PATCH v2 1/1] " Oleg Nesterov
2011-04-26 19:50 ` [PATCH v2 6/6] signal: rename signandsets() to sigandnsets() Oleg Nesterov
2011-04-27 10:11 ` Tejun Heo
2011-04-27 21:43 ` Matt Fleming
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