On Tue, Oct 25, 2022 at 8:39 PM <crash-utility-request@xxxxxxxxxx> wrote: > Date: Tue, 25 Oct 2022 20:38:19 +0800 > From: Tao Liu <ltao@xxxxxxxxxx> > To: crash-utility@xxxxxxxxxx > Subject: [PATCH v2 0/6] Add maple tree vma iteration > support for crash > Message-ID: <20221025123825.36421-1-ltao@xxxxxxxxxx> > Content-Type: text/plain; charset="US-ASCII"; x-default=true > > Patchset [1] introduces maple tree data structure for linux, and the > modification on mm subsystem. > > The main impact on crash utility, is the modification on vm_area_struct. > Patch [2][3] removed the rbtree and linked list iteration of > vm_area_struct, making it impossible for crash to iterate vma > in the traditional way. For example, we can observe the failing > of crash cmd vm/fuser on kernel which has integrated with patchset [1]. > > This patchset deals with the issue by porting and adapting > kernel's maple tree vma iteration code to crash utility. It has been > tested on linux-next-next-20220914 [4]. > > [1]: https://lore.kernel.org/all/20220906194824.2110408-1-Liam.Howlett@xxxxxxxxxx/ > [2]: https://github.com/oracle/linux-uek/commit/d19703645b80abe35dff1a88449d074b0b5b1bb1 > [3]: https://github.com/oracle/linux-uek/commit/91dee01f1ebb6b6587463b6ee6f7bbc4965f91d5 > [4]: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/snapshot/linux-next-next-20220914.tar.gz > > v1 -> v2: > > 1) Move xarray.h and maple_tree_vma.h into maple.h. > 2) Remove variable-length array for maple_tree.c. > 3) Add tree cmd and do_maple_tree() support for maple tree. Thank you for the update, Tao. We are getting back on the right path. Lianbo > 4) Other small modifications. > > Tao Liu (6): > Port the maple tree data structures and main functions > Introduce maple tree vma iteration to memory.c > Add tree cmd support for maple tree > Update the maple tree help info for tree cmd > Add do_maple_tree support for maple tree > Dump maple tree offset variables by help -o > > Makefile | 12 +- > defs.h | 30 ++ > help.c | 45 +- > maple_tree.c | 1367 ++++++++++++++++++++++++++++++++++++++++++++++++++ > maple_tree.h | 214 ++++++++ > memory.c | 319 +++++++----- > symbols.c | 40 ++ > tools.c | 20 +- > 8 files changed, 1885 insertions(+), 162 deletions(-) > create mode 100644 maple_tree.c > create mode 100644 maple_tree.h > > -- > 2.33.1 -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/crash-utility Contribution Guidelines: https://github.com/crash-utility/crash/wiki
