Re: [libvirt] [PATCH 1/4] Add support for limiting guest coredump

Sometimes when guest machine crashes, coredump can get huge due to the guest memory. This can be limited using madvise(2) system call and is being used in QEMU hypervisor. This patch adds an option for configuring that in the domain XML. --- docs/schemas/domaincommon.rng | 8 ++++++++ src/conf/domain_conf.c | 19 ++++++++++++++++++- src/conf/domain_conf.h | 10 ++++++++++ src/libvirt_private.syms | 2 ++ 4 files changed, 38 insertions(+), 1 deletions(-)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index f8fe8b5..4944d0f 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -376,6 +376,11 @@ VIR_ENUM_IMPL(virDomainSoundModel, VIR_DOMAIN_SOUND_MODEL_LAST, "ac97", "ich6") +VIR_ENUM_IMPL(virDomainMemDump, VIR_DOMAIN_MEM_DUMP_LAST, + "default", + "on", + "off") + VIR_ENUM_IMPL(virDomainMemballoonModel, VIR_DOMAIN_MEMBALLOON_MODEL_LAST, "virtio", "xen", @@ -8081,6 +8086,13 @@ static virDomainDefPtr virDomainDefParseXML(virCapsPtr caps, &def->mem.cur_balloon, false) < 0) goto error; + /* and info about it */ + tmp = virXPathString("string(./memory[1]/@dump-core)", ctxt); + if (tmp) { + def->mem.dump_core = virDomainMemDumpTypeFromString(tmp);

+ VIR_FREE(tmp); + } + if (def->mem.cur_balloon > def->mem.max_balloon) { /* Older libvirt could get into this situation due to * rounding; if the discrepancy is less than 1MiB, we silently