Previously users could have different behaviour of malloc simultaneously: one in global FS, others in chroots. Say, in global it could be more relaxed with lesser performance impact and in some chroots more drastic, at contrary. With 6.5 it's not possible anymore, is it really so? This change has own pluses as well indeed: one knob to rule them all but then what if you need something special in just one place, something that shouldn't be following global sysctl parameters -- how do you get it(?)
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