67ff2186b0
Finish weaning user-only away from PageDesc. Using an interval tree to track page permissions means that we can represent very large regions efficiently. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/290 Resolves: https://gitlab.com/qemu-project/qemu/-/issues/967 Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1214 Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
23 lines
557 B
C
23 lines
557 B
C
/*
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* Test very large vma allocations.
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* The qemu out-of-memory condition was within the mmap syscall itself.
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* If the syscall actually returns with MAP_FAILED, the test succeeded.
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*/
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#include <sys/mman.h>
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int main()
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{
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int n = sizeof(size_t) == 4 ? 32 : 45;
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for (int i = 28; i < n; i++) {
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size_t l = (size_t)1 << i;
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void *p = mmap(0, l, PROT_NONE,
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MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, -1, 0);
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if (p == MAP_FAILED) {
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break;
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}
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munmap(p, l);
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}
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return 0;
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}
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