deadlock in malloc

[Jeff Law]

On 03/21/2012 10:19 PM, Carlos O'Donell wrote:
> On Wed, Feb 15, 2012 at 12:40 PM, Jeff Law<law@redhat.com>  wrote:
>> Assume we're we're in libc_malloc and the call to _int_malloc has failed
>> because we're unable to sbrk more memory.
> ...
>> Which seems like the right way to go, so I'd like to unify the 5
>> implementations to have a similar structure.  ie, release the lock within
>> the conditional just prior to calling arena_get2 and being safe WRT
>> modification of ar_ptr->next.
>>
>>
>> Thoughts or comments?
>
> I haven't had time to look at this but I want to make time (that or
> I'll get someone else to review it).
>
> Could you please file a bugzilla issue with a dump of your thoughts so
> we don't loose this?
Done, along with a patch that we're using in Fedora and within Red Hat.
#13939

jeff