search for: virnetclientstreamqueuepacket

...Problem is that instead of returning NULL to >> our malloc()-s once the limit is reached, kernel decides to kill us. >> >> For anybody with libvirt insight: virNetClientIOHandleInput() -> >> virNetClientCallDispatch() -> virNetClientCallDispatchStream() -> >> virNetClientStreamQueuePacket(). >> >> >> The obvious fix would be to stop processing incoming packets if stream has >> "too much" data cached (define "too much"). But this may lead to >> unresponsive client event loop - if the client doesn't pull data from >> incoming...

...libvirt uses to transfer binary data). Problem is that instead of returning NULL to our malloc()-s once the limit is reached, kernel decides to kill us. For anybody with libvirt insight: virNetClientIOHandleInput() -> virNetClientCallDispatch() -> virNetClientCallDispatchStream() -> virNetClientStreamQueuePacket(). The obvious fix would be to stop processing incoming packets if stream has "too much" data cached (define "too much"). But this may lead to unresponsive client event loop - if the client doesn't pull data from incoming stream fast enough they won't be able to mak...

...000 rpc: Fix slow volume download (virsh vol-download) Use I/O vector (iovec) instead of one huge memory buffer as suggested in https://bugzilla.redhat.com/show_bug.cgi?id=1026137#c7. This avoids doing memmove() to big buffers and performance doesn't degrade if source (virNetClientStreamQueuePacket()) is faster than sink (virNetClientStreamRecvPacket()). Resolves: http://bugzilla.redhat.com/1026137 Signed-off-by: Martin Kletzander <mkletzan@redhat.com> Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvi...

I was interested in using 'virsh vol-upload' and 'virsh vol-download', rather than mucking about directly with the filesystem. But while simply copying the image is relatively quick: # ls -l /var/lib/libvirt/images/centos-7-cloud.qcow2 -rw-r--r--. 1 qemu qemu 1004994560 Apr 15 2015 centos-7-cloud.qcow2 # time cp /var/lib/libvirt/images/centos-7-cloud.qcow2

...nsfer binary data). Problem is that instead of returning NULL to > our malloc()-s once the limit is reached, kernel decides to kill us. > > For anybody with libvirt insight: virNetClientIOHandleInput() -> > virNetClientCallDispatch() -> virNetClientCallDispatchStream() -> > virNetClientStreamQueuePacket(). > > > The obvious fix would be to stop processing incoming packets if stream has > "too much" data cached (define "too much"). But this may lead to > unresponsive client event loop - if the client doesn't pull data from > incoming stream fast enough th...

Hi all: I am using the libvirt version that comes with Ubuntu 18.04.3 LTS. I have written a script that backs up my virtual machines every night. I want to limit the amount of memory that this backup operation consumes, mainly to prevent page cache thrashing. I have described the Linux page cache thrashing issue in detail here: