On Mon, Oct 05, 2015 at 04:33:35PM -0600, Ross Zwisler wrote: > Add two new flags to the existing coredump mechanism for ELF files to allow > us to explicitly filter DAX mappings. This is desirable because DAX > mappings, like hugetlb mappings, have the potential to be very large. > > The coredump code relies on get_user_page() to populate the coredump file > with the appropriate data, and for DAX mappings this currently fails. This > results in a hole being placed in the coredump file, so you end up reading > back zeros. Once the get_user_pages() patch series from Dan Williams [1] > is merged, DAX core dumps will give real data. > > I have a patch ready for core(5) to update the documentation on the new > filtering flags. I'll send it out once this gets merged. > > [1] http://thread.gmane.org/gmane.linux.kernel.mm/139026 > > Ross Zwisler (2): > coredump: add DAX filtering for ELF coredumps > coredump: add DAX filtering for FDPIC ELF coredumps > > Documentation/filesystems/proc.txt | 22 ++++++++++++---------- > fs/binfmt_elf.c | 10 ++++++++++ > fs/binfmt_elf_fdpic.c | 15 +++++++++++++++ > include/linux/sched.h | 4 +++- > 4 files changed, 40 insertions(+), 11 deletions(-) > > -- > 2.1.0 Ping? -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
