Samuel Thibault <
sthibault@debian.org> writes:
>>when allocating an anonymous physical page on a Page Fault,
>> why does kernel have to fill it with zeroes?
>> I understand it has something to do with security.
>See man mmap. Anonymous memory is explicitly documented as being set to
>0.
>Samuel
Ok,thanks. So libraries and things are potentially expecting the memory to be 0, hence my troubles.
Timo Juhani Lindfors <
timo.lindfors@iki.fi> writes:
> How did you disable it?
By removing __GFP_ZERO flag from alloc_page_vma function.
Thanks,
Viacheslav