Re: [libvirt] [PATCH v2 1/3] 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 and related documentation. --- docs/formatdomain.html.in | 12 +++++++++--- docs/schemas/domaincommon.rng | 8 ++++++++ src/conf/domain_conf.c | 25 ++++++++++++++++++++++++- src/conf/domain_conf.h | 10 ++++++++++ src/libvirt_private.syms | 2 ++ 5 files changed, 53 insertions(+), 4 deletions(-) diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index d021837..210ebe0 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -515,9 +515,15 @@ However, the value will be rounded up to the nearest kibibyte by libvirt, and may be further rounded to the granularity supported by the hypervisor. Some hypervisors also enforce a - minimum, such as - 4000KiB. <span class='since'><code>unit</code> since - 0.9.11</span></dd> + minimum, such as 4000KiB. + + In the case of crash, optional attribute <code>dump-core</code> + can be used to control whether the guest memory should be + included in the generated coredump or not (values "on", "off"). + + <span class='since'><code>unit</code> since 0.9.11</span>, + <span class='since'><code>dump-core</code> since 0.10.2 + (QEMU only)</span></dd> <dt><code>currentMemory</code></dt> <dd>The actual allocation of memory for the guest. This value can be less than the maximum allocation, to allow for ballooning diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng index ed25f58..bf6afbb 100644 --- a/docs/schemas/domaincommon.rng +++ b/docs/schemas/domaincommon.rng @@ -470,6 +470,14 @@ <interleave> <element name="memory"> <ref name='scaledInteger'/> + <optional> + <attribute name="dump-core">

+ <choice> + <value>on</value> + <value>off</value> + </choice> + </attribute> + </optional> </element> <optional> <element name="currentMemory">