Hi Vinayak, Thanks for the clarification and secondary fix -- the vmstat patch is queued for crash-7.2.1: https://github.com/crash-utility/crash/commit/7ac1368cdca0fc2013bb3963456fcd2574c7cdd7 Dave ----- Original Message ----- > Hi Dave, > > On Fri, Nov 3, 2017 at 11:32 PM, Dave Anderson <anderson@xxxxxxxxxx> wrote: > > > > > > ----- Original Message ----- > >> On Thu, Nov 2, 2017 at 8:58 PM, Dave Anderson <anderson@xxxxxxxxxx> wrote: > >> > > >> > > >> > ----- Original Message ----- > >> >> From: Vinayak Menon <vinayakm.list@xxxxxxxxx> > >> >> > >> >> With kernels where LRUs are moved to node and thus vm_stat is > >> >> split into zone and node, crash utility fails to show the vmstat with > >> >> "kmem > >> >> -V", and the "CACHED" of kmem -i is shown as zero. > >> >> > >> >> Signed-off-by: Vinayak Menon <vinayakm.list@xxxxxxxxx> > >> > > >> > Nice -- thanks for catching this! > >> > > >> > But can you re-send the patch as an attachment? It appears that the > >> > inlined patch below has all tabs replaced with spaces: > >> > > >> Sure. Attached. > > > > Hi Vinayak, > > > > I understand that this kernel change was introduced in 4.8, and > > I don't have a lot of 4.8 and later kernels to test with. > > > > But of the ones I do have, the 4.8, 4.13 and 4.14 kernels tested OK, > > but both of my 4.11.0-based kernels show the same type of bogus > > CACHED values: > > > > > > Can you take a look at what happened in those dumpfiles? I'm > > guessing there's some negative number involved somewhere. > > > That turned out to be a different issue. swapper_space_nrpages was going > wrong. > After the following kernel change, the swap cache address space is > split into many. > > commit 4b3ef9daa4fc0bba742a79faecb17fdaaead083b > Author: Huang, Ying <ying.huang@xxxxxxxxx> > Date: Wed Feb 22 15:45:26 2017 -0800 > > mm/swap: split swap cache into 64MB trunks > > I have fixed it with the attached patch and with the 2 vmcores you had > provided it looks okay. > > Thanks, > Vinayak > -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility
