disco verification: ubuntu@d06-4:~$ cat /proc/version Linux version 5.0.0-16-generic (buildd@bos02-arm64-013) (gcc version 8.3.0 (Ubuntu/Linaro 8.3.0-6ubuntu1)) #17-Ubuntu SMP Wed May 15 10:54:19 UTC 2019 ubuntu@d06-4:~$ dmesg | grep cma [ 0.000000] cma: Reserved 16 MiB at 0x000000007f000000 [ 0.000000] Memory: 180830576K/184545152K available (11836K kernel code, 1694K rwdata, 5060K rodata, 5504K init, 1158K bss, 3698192K reserved, 16384K cma-reserved) [ 18.211364] cma: cma_alloc: alloc failed, req-size: 33 pages, ret: -12 [ 18.217896] cma: cma_alloc: alloc failed, req-size: 33 pages, ret: -12 [ 18.254209] cma: cma_alloc: alloc failed, req-size: 33 pages, ret: -12 [ 18.308352] cma: cma_alloc: alloc failed, req-size: 33 pages, ret: -12 [ 18.328708] cma: cma_alloc: alloc failed, req-size: 33 pages, ret: -12 [ 18.350072] cma: cma_alloc: alloc failed, req-size: 33 pages, ret: -12 [ 18.350081] cma: cma_alloc: alloc failed, req-size: 33 pages, ret: -12 [ 18.350089] cma: cma_alloc: alloc failed, req-size: 33 pages, ret: -12 [ 18.350097] cma: cma_alloc: alloc failed, req-size: 33 pages, ret: -12 [ 18.350106] cma: cma_alloc: alloc failed, req-size: 33 pages, ret: -12 [ 27.962013] cma_alloc: 358 callbacks suppressed [ 27.962014] cma: cma_alloc: alloc failed, req-size: 1 pages, ret: -12 [ 27.968453] cma: cma_alloc: alloc failed, req-size: 1 pages, ret: -12 [ 27.974915] cma: cma_alloc: alloc failed, req-size: 1 pages, ret: -12 [ 27.981347] cma: cma_alloc: alloc failed, req-size: 1 pages, ret: -12 [ 27.987779] cma: cma_alloc: alloc failed, req-size: 1 pages, ret: -12 [ 27.994211] cma: cma_alloc: alloc failed, req-size: 1 pages, ret: -12 [ 28.000647] cma: cma_alloc: alloc failed, req-size: 1 pages, ret: -12 [ 28.000649] cma: cma_alloc: alloc failed, req-size: 1 pages, ret: -12 [ 28.013539] cma: cma_alloc: alloc failed, req-size: 1 pages, ret: -12 [ 28.019974] cma: cma_alloc: alloc failed, req-size: 1 pages, ret: -12
** Tags removed: verification-needed-disco ** Tags added: verification-done-disco -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1828092 Title: ratelimit cma_alloc messages Status in linux package in Ubuntu: Incomplete Status in linux source package in Disco: Fix Committed Bug description: [Impact] As described in bug 1823753, failures to allocate DMA out of CMA space can result in ~10K cma_alloc() error messages. While non-fatal (the code falls back to allocating memory out of non-CMA space), the error messages themselves can be a problem - esp. for systems w/ slow consoles like the HP m400 (9600 baud). It slows down boot so much that MAAS deploys fail due to timeout. [Test Case] Boot the disco kernel on an HP m400 or a HiSilicon D06 w/ the SMMU disabled in the BIOS. [Fix] Ratelimit the messages. [Regression Risk] Minimal - we're just attempting to quiescing log spew. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1828092/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
