gfv · HackerTrans

10 か月前議論

sysctl vm.overcommit_memory=2. However, programs for *nix-based systems usually expect overcommit to be on, for example, to support fork(). This is a stark contrast with Windows NT model, where an allocation will fail if it doesn't fit in the remaining memory+swap.

gfv

3 年前議論

You may want to print multiple pages per sheet.

gfv

7 年前議論

The fundamental problem here is that the kernel can't time-travel into the future far enough to make sure no higher-priority processes will try to allocate more memory, as the system has to make the decision to return ENOMEM at the time of the allocation. There is a reasonable(-ish?) default to deny allocations that request more memory than currently available (using the Linux definition of available, that is total memory without the sum of resident sets of all processes and a bit more). Of course, this limit only works properly if other processes do not add anything to their working sets, but again, the kernel's fortune-telling abilities are quite limited.

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