Re: [PATCH 3/5] ptrace/arm: Revert "hw_breakpoints: Fix racy access to ptrace breakpoints"

2013-04-16 Thread Will Deacon
On Sun, Apr 14, 2013 at 05:05:34PM +0100, Oleg Nesterov wrote: > This reverts commit bf0b8f4b55e591ba417c2dbaff42769e1fc773b0. > > The patch was fine but we can no longer race with SIGKILL after > 9899d11f "ptrace: ensure arch_ptrace/ptrace_request can never race > with SIGKILL", the

Re: [PATCH 3/5] ptrace/arm: Revert hw_breakpoints: Fix racy access to ptrace breakpoints

2013-04-16 Thread Will Deacon
On Sun, Apr 14, 2013 at 05:05:34PM +0100, Oleg Nesterov wrote: This reverts commit bf0b8f4b55e591ba417c2dbaff42769e1fc773b0. The patch was fine but we can no longer race with SIGKILL after 9899d11f ptrace: ensure arch_ptrace/ptrace_request can never race with SIGKILL, the __TASK_TRACED

[PATCH 3/5] ptrace/arm: Revert "hw_breakpoints: Fix racy access to ptrace breakpoints"

2013-04-14 Thread Oleg Nesterov
This reverts commit bf0b8f4b55e591ba417c2dbaff42769e1fc773b0. The patch was fine but we can no longer race with SIGKILL after 9899d11f "ptrace: ensure arch_ptrace/ptrace_request can never race with SIGKILL", the __TASK_TRACED tracee can't be woken up and ->ptrace_bps[] can't go away.

[PATCH 3/5] ptrace/arm: Revert hw_breakpoints: Fix racy access to ptrace breakpoints

2013-04-14 Thread Oleg Nesterov
This reverts commit bf0b8f4b55e591ba417c2dbaff42769e1fc773b0. The patch was fine but we can no longer race with SIGKILL after 9899d11f ptrace: ensure arch_ptrace/ptrace_request can never race with SIGKILL, the __TASK_TRACED tracee can't be woken up and -ptrace_bps[] can't go away. Signed-off-by: