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Use MAP_NORESERVE when available in mmap (Linux) #9506

Merged

Nekotekina merged 1 commit into RPCS3:master from Nekotekina:atomic

Dec 27, 2020

Member

Nekotekina commented Dec 27, 2020

This flag is used in huge mappings allocated only for reserve purpose but possibly unused. From the description:

MAP_NORESERVE
Do not reserve swap space for this mapping.  When swap
              space is reserved, one has the guarantee that it is
              possible to modify the mapping.  When swap space is not
              reserved one might get SIGSEGV upon a write if no physical
              memory is available. ...

It should make it more close to what MEM_RESERVE flag does on Windows.


          vm_native.cpp: conditionally define c_madv_free

e3dec42

Nekotekina force-pushed the atomic branch from d914093 to e3dec42 Compare

December 27, 2020 09:20

Nekotekina merged commit e3dec42 into RPCS3:master

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