Auto-triggered dumps (on_crash, watchdog) always use QEMU's elf default, which is not WinDbg-loadable for a Windows guest and cannot be reliably converted after the fact. This was proposed before as a per-domain XML knob (https://www.mail-archive.com/devel@lists.libvirt.org/msg09638.html). Daniel P. Berrange objected: QEMU's query-dump-guest-memory-capability reported win-dmp as available on any x86-64 guest regardless of whether it had actually published a Windows dump header, so trusting it was not safe. QEMU's win_dump_available() has since been fixed to check the guest's vmcoreinfo note (https://lore.kernel.org/qemu-devel/20260619101834.228432-1-den@openvz.org/, commit b4bdad7dce). Patch 1 queries it directly instead of adding an XML knob. Patch 4 adds a quota (auto_dump_max_size): a guest that keeps crashing otherwise fills auto_dump_path one dump at a time. Oldest dumps are pruned after each new one; the dump just written is never removed, even alone over quota. Patches 2-3 give that setting and virtlogd's max_size a "10GiB"-style syntax instead of a raw byte count, reusing virScaleInteger()'s existing unit table. Validated against real guests: a Windows Server 2022 guest crashed via Sysinternals NotMyFault produces a PAGEDU64 (win-dmp) dump; an AlmaLinux 9 guest crashed via sysrq produces an ELF one. A 1GiB quota across two Linux crashes pruned the older dump and kept the newer, over-quota one. syntax-check and virstringtest pass. Denis V. Lunev (4): qemu: auto-select win-dmp for crash- and watchdog-triggered dumps util: add virStrToBytes() and virConfGetValueBytes() for scaled sizes logging: accept a unit suffix in virtlogd's max_size qemu: cap total size of auto-triggered dumps under auto_dump_path src/libvirt_private.syms | 2 + src/logging/log_daemon_config.c | 2 +- src/logging/log_daemon_config.h | 2 +- src/logging/virtlogd.conf | 7 +- src/qemu/qemu.conf.in | 16 ++++ src/qemu/qemu_conf.c | 2 + src/qemu/qemu_conf.h | 1 + src/qemu/qemu_driver.c | 127 +++++++++++++++++++++++++++++++- src/util/virconf.c | 47 ++++++++++++ src/util/virconf.h | 3 + src/util/virutil.c | 23 ++++++ src/util/virutil.h | 5 ++ tests/virstringtest.c | 76 +++++++++++++++++++ 13 files changed, 308 insertions(+), 5 deletions(-) -- 2.53.0