On Thu, Mar 22, 2018 at 07:07:12AM -0400, Bastien Nocera wrote: > > > ----- Original Message ----- > > On Wed, Mar 21, 2018 at 10:30:09PM -0600, Chris Murphy wrote: > > > For Fedora 27 it says this: > > > > > > Fedora Workstation to a laptop or desktop computer that has at least 1 > > > GHz processor, 1 GB RAM, and 10 GB space available > > > > > > https://getfedora.org/en/workstation/download/ > > > > > > When I set a VM to 1G it's always unusable. Sometimes it's PackageKit > > > that crashes first, which causes systemd-coredump to spin up and run > > > out of memory next, and then oom killers start killing off various > > > processes. Sometimes the oom killing just starts happening without a > > > prior crash. In any case I never get a desktop. > > > > > > With 1.5G RAM I usually get a desktop but then if anything crashes, > > > and it seems like PackageKit is crashing often when under memory > > > pressure (?), it kicks off systemd-coredump which makes the memory > > > problem worse > > > > systemd-coredump should probably short-circuit the coredump in oom > > conditions. > > I'm not sure what the exact conditions should be, maybe if the amount > > of free RAM is lower then the core size? > > Why does the kernel even make that information available? I regularly have > my machine made unusable when the kernel decides to kill the largest memory > users (usually the mail client, or a browser tab), and it OOM kills the > largest memory users, meaning the ones that will take the longest to dump > to disk. > > We already have records of the application being killed through OOM in the > journal, we should be spared even trying to pass the core to user-space. That depends. Sometimes you want the core on oom to diagnose a memory leak. There are two different cases: - a single program went awry and used all memory and was killed. After it is gone, the machine will be usable again. It's potentially useful to dump the core. - the machine is generally starved for resources, and even after the biggest consumer of memory has been killed, there still is not enough. Dump of the core puts further strain on the system and should be avoided. The question is how to distinguish those two cases. Zbyszek _______________________________________________ desktop mailing list -- desktop@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to desktop-leave@xxxxxxxxxxxxxxxxxxxxxxx
