Re: [PATCH v12 22/22] selftests/vm: Fix deadlock in protection_keys.c

2018-03-16 Thread Dave Hansen
On 02/21/2018 05:55 PM, Ram Pai wrote: > From: Thiago Jung Bauermann > > The sig_chld() handler calls dprintf2() taking care of setting > dprint_in_signal so that sigsafe_printf() won't call printf(). > Unfortunately, this precaution is is negated by dprintf_level(), which > has a call to fflush(

Re: [PATCH v12 22/22] selftests/vm: Fix deadlock in protection_keys.c

2018-02-25 Thread Balbir Singh
On Wed, 21 Feb 2018 17:55:41 -0800 Ram Pai wrote: > From: Thiago Jung Bauermann > > The sig_chld() handler calls dprintf2() taking care of setting > dprint_in_signal so that sigsafe_printf() won't call printf(). > Unfortunately, this precaution is is negated by dprintf_level(), which > has a ca

[PATCH v12 22/22] selftests/vm: Fix deadlock in protection_keys.c

2018-02-21 Thread Ram Pai
From: Thiago Jung Bauermann The sig_chld() handler calls dprintf2() taking care of setting dprint_in_signal so that sigsafe_printf() won't call printf(). Unfortunately, this precaution is is negated by dprintf_level(), which has a call to fflush(). This function acquires a lock, which means that