On Thu 21-09-17 06:38:50, Yang Shi wrote: > Recently we ran into a oom issue, kernel panic due to no killable process. > The dmesg shows huge unreclaimable slabs used almost 100% memory, but kdump doesn't capture vmcore due to some reason. > > So, it may sound better to capture unreclaimable slab info in oom message when kernel panic to aid trouble shooting and cover the corner case. > Since kernel already panic, so capturing more information sounds worthy and doesn't bother normal oom killer. > > With the patchset, tools/vm/slabinfo has a new option, "-U", to show unreclaimable slab only. > > And, oom will print all non zero (num_objs * size != 0) unreclaimable slabs in oom killer message. Well, I do undestand that this _might_ be useful but it also might generates a _lot_ of output. The oom report can be quite verbose already so is this something we want to have enabled by default? -- Michal Hocko SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
