This revives Philippe Mathieu-Daudé's patch from 2021. The original posting and discussion are available at:
https://lore.kernel.org/r/[email protected] When host memory allocation fails, QEMU reports the affected memory region and host error, but not the size of the failed allocation. This makes accidental requests harder to spot. In particular, a bare value passed to '-m' is interpreted as MiB, so a user expecting bytes can unintentionally request tens of TiB. The patch adds the human-readable RAMBlock size to the existing error. This does not try to explain host-specific overcommit, cgroup, or NUMA policy. It provides the most useful portable fact available at the failure site and makes both user mistakes and support reports easier to diagnose. Changes in v2: - Rebase onto current master - Update the source path from softmmu/physmem.c to system/physmem.c - Fix a typo in the commit message - Collect Peter Xu's Reviewed-by and Bin Meng's Tested-by Philippe Mathieu-Daudé (1): system/physmem: Improve guest memory allocation failure error message system/physmem.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- base-commit: eea8fe61b8be8f3016e522e6af24924a0266ca95 branch: virt -- 2.53.0
