3 ms·
Right, but Linux won't bind any physical memory page until you actually read or write in it. So if you malloc() and mlock() 1GB of memory without reading/writin
by bnegreve 13y ago
Right, but Linux won't bind any physical memory page until you actually read or write in it. So if you malloc() and mlock() 1GB of memory without reading/writing in it, that will not use any bit of physical memory.
- pritambaral 13y agoWill writing just one byte one time suffice? Genuinely unaware and curious.
- bnegreve 13y agoIf you only touch one byte, the system will only allocate one memory page. A memory page is typically 1024 KB so that wouldn't suffice.
- nkurz 13y agoOn Linux, 4K is still a much more common page size. Most "Huge Pages" ("Large Pages" in Windows speak) are 2 or 4 MB, and have been available since 2.6, but I don't think they are widely used yet. x86_64 also supports 1GB pages, but these are even less frequently used. http://lwn.net/Articles/374424/ http://lwn.net/Articles/374424/
- bnegreve 13y agoYes 4K is default page size. Sorry.