On 07/09/2015 02:12 PM, Hans Verkuil wrote: > On 07/09/2015 01:48 PM, Jan Kara wrote: >> Hello, >> >> Hans, did you have a chance to look at these patches? I have tested them >> with the vivid driver but it would be good if you could run them through >> your standard testing procedure as well. Andrew has updated the patches in >> his tree but some ack from you would be welcome... > > I've planned a 'patch day' for Monday. So hopefully you'll see a pull request > by then. OK, I'm confused. I thought the non-vb2 patches would go in for 4.2? That didn't happen, so I guess the plan is to merge the whole lot for 4.3 via our media tree? If that's the case, can you post a new patch series on top of the master branch of the media tree? I want to make sure I use the right patches. Also, if you do make a new patch series, then it would be better if patch 10/10 is folded into patch 2/10. If that's not the case, then you have to let me know what I should do. Regards, Hans >> >> Honza >> On Thu 18-06-15 16:08:30, Jan Kara wrote: >>> Hello, >>> >>> I'm sending the sixth version of my patch series to abstract vma handling from >>> the various media drivers. Since the previous version I have added a patch to >>> move mm helpers into a separate file and behind a config option. I also >>> changed patch pushing mmap_sem down in videobuf2 core to avoid lockdep warning >>> and NULL dereference Hans found in his testing. I've also included small >>> fixups Andrew was carrying. >>> >>> After this patch set drivers have to know much less details about vmas, their >>> types, and locking. Also quite some code is removed from them. As a bonus >>> drivers get automatically VM_FAULT_RETRY handling. The primary motivation for >>> this series is to remove knowledge about mmap_sem locking from as many places a >>> possible so that we can change it with reasonable effort. >>> >>> The core of the series is the new helper get_vaddr_frames() which is given a >>> virtual address and it fills in PFNs / struct page pointers (depending on VMA >>> type) into the provided array. If PFNs correspond to normal pages it also grabs >>> references to these pages. The difference from get_user_pages() is that this >>> function can also deal with pfnmap, and io mappings which is what the media >>> drivers need. >>> >>> I have tested the patches with vivid driver so at least vb2 code got some >>> exposure. Conversion of other drivers was just compile-tested (for x86 so e.g. >>> exynos driver which is only for Samsung platform is completely untested). >>> >>> Andrew, can you please update the patches in mm three? Thanks! >>> >>> Honza >>> >>> Changes since v5: >>> * Moved mm helper into a separate file and behind a config option >>> * Changed the first patch pushing mmap_sem down in videobuf2 core to avoid >>> possible deadlock >>> >>> Changes since v4: >>> * Minor cleanups and fixes pointed out by Mel and Vlasta >>> * Added Acked-by tags >>> >>> Changes since v3: >>> * Added include <linux/vmalloc.h> into mm/gup.c as it's needed for some archs >>> * Fixed error path for exynos driver >>> >>> Changes since v2: >>> * Renamed functions and structures as Mel suggested >>> * Other minor changes suggested by Mel >>> * Rebased on top of 4.1-rc2 >>> * Changed functions to get pointer to array of pages / pfns to perform >>> conversion if necessary. This fixes possible issue in the omap I may have >>> introduced in v2 and generally makes the API less errorprone. > > -- > To unsubscribe from this list: send the line "unsubscribe linux-media" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
