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Date: Tue, 09 Oct 2012 12:02:01 +0200 From: Eric Dumazet <eric.dumazet@...il.com> To: Konstantin Khlebnikov <khlebnikov@...nvz.org>, Alex Williamson <alex.williamson@...hat.com> Cc: linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org, Hugh Dickins <hughd@...gle.com>, Linus Torvalds <torvalds@...ux-foundation.org>, Nick Piggin <npiggin@...nel.dk> Subject: Re: [PATCH v3 10/10] mm: kill vma flag VM_RESERVED and mm->reserved_vm counter On Tue, 2012-07-31 at 14:42 +0400, Konstantin Khlebnikov wrote: > A long time ago, in v2.4, VM_RESERVED kept swapout process off VMA, > currently it lost original meaning but still has some effects: > > | effect | alternative flags > -+------------------------+--------------------------------------------- > 1| account as reserved_vm | VM_IO > 2| skip in core dump | VM_IO, VM_DONTDUMP > 3| do not merge or expand | VM_IO, VM_DONTEXPAND, VM_HUGETLB, VM_PFNMAP > 4| do not mlock | VM_IO, VM_DONTEXPAND, VM_HUGETLB, VM_PFNMAP > > This patch removes reserved_vm counter from mm_struct. > Seems like nobody cares about it, it does not exported into userspace directly, > it only reduces total_vm showed in proc. > > Thus VM_RESERVED can be replaced with VM_IO or pair VM_DONTEXPAND | VM_DONTDUMP. > > remap_pfn_range() and io_remap_pfn_range() set VM_IO|VM_DONTEXPAND|VM_DONTDUMP. > remap_vmalloc_range() set VM_DONTEXPAND | VM_DONTDUMP. > > Signed-off-by: Konstantin Khlebnikov <khlebnikov@...nvz.org> > Cc: Nick Piggin <npiggin@...nel.dk> > Cc: Hugh Dickins <hughd@...gle.com> > --- > Documentation/vm/unevictable-lru.txt | 4 ++-- > arch/alpha/kernel/pci-sysfs.c | 2 +- > arch/ia64/kernel/perfmon.c | 2 +- > arch/ia64/mm/init.c | 3 ++- > arch/powerpc/kvm/book3s_hv.c | 2 +- > arch/sparc/kernel/pci.c | 2 +- > arch/unicore32/kernel/process.c | 2 +- > arch/x86/xen/mmu.c | 3 +-- > drivers/char/mbcs.c | 2 +- > drivers/char/mem.c | 2 +- > drivers/char/mspec.c | 2 +- > drivers/gpu/drm/drm_gem.c | 2 +- > drivers/gpu/drm/drm_vm.c | 10 ++-------- > drivers/gpu/drm/exynos/exynos_drm_gem.c | 2 +- > drivers/gpu/drm/gma500/framebuffer.c | 3 +-- > drivers/gpu/drm/ttm/ttm_bo_vm.c | 4 ++-- > drivers/gpu/drm/udl/udl_fb.c | 2 +- > drivers/infiniband/hw/ehca/ehca_uverbs.c | 4 ++-- > drivers/infiniband/hw/ipath/ipath_file_ops.c | 2 +- > drivers/infiniband/hw/qib/qib_file_ops.c | 2 +- > drivers/media/video/meye.c | 2 +- > drivers/media/video/omap/omap_vout.c | 2 +- > drivers/media/video/sn9c102/sn9c102_core.c | 3 +-- > drivers/media/video/usbvision/usbvision-video.c | 3 +-- > drivers/media/video/videobuf-dma-sg.c | 2 +- > drivers/media/video/videobuf-vmalloc.c | 2 +- > drivers/media/video/videobuf2-memops.c | 2 +- > drivers/media/video/vino.c | 2 +- > drivers/misc/carma/carma-fpga.c | 2 -- > drivers/misc/sgi-gru/grufile.c | 5 ++--- > drivers/mtd/mtdchar.c | 2 +- > drivers/scsi/sg.c | 2 +- > drivers/staging/media/easycap/easycap_main.c | 2 +- > drivers/staging/omapdrm/omap_gem_dmabuf.c | 2 +- > drivers/staging/tidspbridge/rmgr/drv_interface.c | 2 +- > drivers/uio/uio.c | 4 +--- > drivers/usb/mon/mon_bin.c | 2 +- > drivers/video/68328fb.c | 2 +- > drivers/video/aty/atyfb_base.c | 3 +-- > drivers/video/fb-puv3.c | 3 +-- > drivers/video/fb_defio.c | 2 +- > drivers/video/fbmem.c | 3 +-- > drivers/video/gbefb.c | 2 +- > drivers/video/omap2/omapfb/omapfb-main.c | 2 +- > drivers/video/sbuslib.c | 5 ++--- > drivers/video/smscufx.c | 1 - > drivers/video/udlfb.c | 1 - > drivers/video/vermilion/vermilion.c | 1 - > drivers/video/vfb.c | 1 - > drivers/xen/gntalloc.c | 2 +- > drivers/xen/gntdev.c | 2 +- > drivers/xen/privcmd.c | 3 ++- > fs/binfmt_elf.c | 2 +- > fs/binfmt_elf_fdpic.c | 2 +- > fs/hugetlbfs/inode.c | 2 +- > fs/proc/task_mmu.c | 2 +- > include/linux/mempolicy.h | 2 +- > include/linux/mm.h | 3 +-- > include/linux/mm_types.h | 1 - > kernel/events/core.c | 2 +- > mm/ksm.c | 3 +-- > mm/memory.c | 11 +++++------ > mm/mlock.c | 2 +- > mm/mmap.c | 2 -- > mm/nommu.c | 2 +- > mm/vmalloc.c | 3 +-- > security/selinux/selinuxfs.c | 2 +- > sound/core/pcm_native.c | 6 +++--- > sound/usb/usx2y/us122l.c | 2 +- > sound/usb/usx2y/usX2Yhwdep.c | 2 +- > sound/usb/usx2y/usx2yhwdeppcm.c | 2 +- > 71 files changed, 78 insertions(+), 106 deletions(-) It seems drivers/vfio/pci/vfio_pci.c uses VM_RESERVED CC [M] drivers/watchdog/advantechwdt.o drivers/vfio/pci/vfio_pci.c: In function ‘vfio_pci_mmap’: drivers/vfio/pci/vfio_pci.c:464:28: erreur: ‘VM_RESERVED’ undeclared (first use in this function) drivers/vfio/pci/vfio_pci.c:464:28: note: each undeclared identifier is reported only once for each function it appears in -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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