[Bug 274316] excessive memory consumed by static_single_cpu_mask
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Date: Fri, 06 Oct 2023 21:32:29 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=274316 Bug ID: 274316 Summary: excessive memory consumed by static_single_cpu_mask Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: emaste@freebsd.org in sys/compat/linuxkpi/common/src/linux_compat.c we have: static cpumask_t static_single_cpu_mask[MAXCPU]; cpumask_t * lkpi_get_static_single_cpu_mask(int cpuid) { KASSERT((cpuid >= 0 && cpuid < MAXCPU), ("%s: invalid cpuid %d\n", __func__, cpuid)); return (&static_single_cpu_mask[cpuid]); } when testing (an admittedly excessive) MAXCPU=65536 this array is huge (as cpumask_t also scales with MAXCPU). on arm64 andrew found it is responsible for 512M of .bss's 566M. -- You are receiving this mail because: You are the assignee for the bug.