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...what I need to do next? Below hopefully is enough for someone to see what I've got wrong. They're done with mail_location set to the default, i.e. commented out in 10-mail.conf I've also put the log file up at http://www.stainburn.com/centos.log which should be easier to read. cpage is an established user, tdegg is a new one. As I say below, I have found a work-around but even that still has errors. [root at ollie2 home]# for F in cpage tdegg ; do ls -lad /home/$F /home/$F/* /home/$F/.* /home/$F/* /home/$F/mail/* /home/$F/mail/.* /home/$F/mail/.imap/* /var/spool/mail/$F ;...

...grated). * * Once the caller is done cleaning up things and updating its page table (if it * chose to do so, this is not an obligation) it finally calls @@ -2657,10 +2656,11 @@ int migrate_vma_setup(struct migrate_vma *args) args->npages = 0; migrate_vma_collect(args); - if (args->cpages) - migrate_vma_prepare(args); - if (args->cpages) - migrate_vma_unmap(args); + if (!args->cpages) + return 0; + + migrate_vma_prepare(args); + migrate_vma_unmap(args); /* * At this point pages are locked and unmapped, and thus they have

On Fri, Aug 16, 2019 at 05:11:07PM +0000, Jason Gunthorpe wrote: > - if (args->cpages) > - migrate_vma_prepare(args); > - if (args->cpages) > - migrate_vma_unmap(args); > + if (!args->cpages) > + return 0; > + > + migrate_vma_prepare(args); > + migrate_vma_unmap(args); I don't think this is ok. Both migrate_vma_prepare and migrate_vma_unmap ca...

These changes are based on Jason's latest hmm branch. Patch 1 was previously posted here [1] but was dropped from the orginal series. Hopefully, the tests will reduce concerns about edge conditions. I'm sure more tests could be usefully added but I thought this was a good starting point. [1] https://lore.kernel.org/linux-mm/20190726005650.2566-6-rcampbell at nvidia.com/ Ralph Campbell

...fault too. > */ > - ret = migrate_vma(&nouveau_dmem_fault_migrate_ops, vmf->vma, > - vmf->address, vmf->address + PAGE_SIZE, > - src, dst, &fault); > - if (ret) > + if (migrate_vma_setup(&args) < 0) > return VM_FAULT_SIGBUS; > + if (!args.cpages) > + return 0; > + > + nouveau_dmem_fault_alloc_and_copy(args.vma, src, dst, args.start, > + args.end, &fault); > + migrate_vma_pages(&args); > + nouveau_dmem_fault_finalize_and_map(&fault); > > + migrate_vma_finalize(&args); > if (dst[0] == MIGR...

...likely that more surrounding page will CPU fault too. */ - ret = migrate_vma(&nouveau_dmem_fault_migrate_ops, vmf->vma, - vmf->address, vmf->address + PAGE_SIZE, - src, dst, &fault); - if (ret) + if (migrate_vma_setup(&args) < 0) return VM_FAULT_SIGBUS; + if (!args.cpages) + return 0; + + nouveau_dmem_fault_alloc_and_copy(args.vma, src, dst, args.start, + args.end, &fault); + migrate_vma_pages(&args); + nouveau_dmem_fault_finalize_and_map(&fault); + migrate_vma_finalize(&args); if (dst[0] == MIGRATE_PFN_ERROR) return VM_FAULT_SIGBUS; @@...

This series adds new functions to the mmu interval notifier API to allow device drivers with MMUs to dynamically mirror a process' page tables based on device faults and invalidation callbacks. The Nouveau driver is updated to use the extended API and a set of stand alone self tests is added to help validate and maintain correctness. The patches are based on linux-5.5.0-rc6 and are for

...since v2: - don't unmap pages when returning 0 from nouveau_dmem_migrate_to_ram - minor style fixes - add a new patch to remove CONFIG_MIGRATE_VMA_HELPER Changes since v1: - fix a few whitespace issues - drop the patch to remove MIGRATE_PFN_WRITE for now - various spelling fixes - clear cpages and npages in migrate_vma_setup - fix the nouveau_dmem_fault_copy_one return value - minor improvements to some nouveau internal calling conventions

...likely that more surrounding page will CPU fault too. */ - ret = migrate_vma(&nouveau_dmem_fault_migrate_ops, vmf->vma, - vmf->address, vmf->address + PAGE_SIZE, - src, dst, &fault); - if (ret) + if (migrate_vma_setup(&args) < 0) return VM_FAULT_SIGBUS; + if (!args.cpages) + return 0; + + nouveau_dmem_fault_alloc_and_copy(args.vma, src, dst, args.start, + args.end, &fault); + migrate_vma_pages(&args); + nouveau_dmem_fault_finalize_and_map(&fault); + migrate_vma_finalize(&args); if (dst[0] == MIGRATE_PFN_ERROR) return VM_FAULT_SIGBUS; @@...

Hi Jérôme, Ben and Jason, below is a series against the hmm tree which starts revamping the migrate_vma functionality. The prime idea is to export three slightly lower level functions and thus avoid the need for migrate_vma_ops callbacks. Diffstat: 4 files changed, 285 insertions(+), 602 deletions(-) A git tree is also available at: git://git.infradead.org/users/hch/misc.git

...//git.infradead.org/users/hch/misc.git migrate_vma-cleanup.2 Gitweb: http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/migrate_vma-cleanup.2 Changes since v1: - fix a few whitespace issues - drop the patch to remove MIGRATE_PFN_WRITE for now - various spelling fixes - clear cpages and npages in migrate_vma_setup - fix the nouveau_dmem_fault_copy_one return value - minor improvements to some nouveau internal calling conventions

...XP share using the following line in my fstab \\WINDOWS-PC\SHARE /dir/to/mount/share smbfs auto,umask=0002,credentials=/etc/winpassword,iocharset=utf8,gid=0,noauto 0 0 It mounts OK but I can't get the charset shown correctly for non-ASCII chars like ? ? ? et cetera. I've even tried using cpage=850 option when mounting without success. I've looked for this issue on Samba documentation but wasn't able to find an example on how to solve it. Does anyone have any idea about how to deal with this kinda shares? T.I.A. -- Arlequ?n _o) amahoro_AT_adinet_DOT_...

...ptr_t)buffer->ptr, size); + ret = madvise(map, size, MADV_HUGEPAGE); + ASSERT_EQ(ret, 0); + old_ptr = buffer->ptr; + buffer->ptr = map; + + /* Migrate memory to device. */ + ret = hmm_dmirror_cmd(self->fd, HMM_DMIRROR_MIGRATE, buffer, npages); + ASSERT_EQ(ret, 0); + ASSERT_EQ(buffer->cpages, npages); + + /* Check what the device read. */ + for (i = 0, ptr = buffer->mirror; i < size / sizeof(*ptr); ++i) + ASSERT_EQ(ptr[i], 0); + + buffer->ptr = old_ptr; + hmm_buffer_free(buffer); +} + +/* + * Migrate private anonymous huge zero page. + */ +TEST_F(hmm, migrate_anon_huge_zero)...

This series adds support for transparent huge page migration to migrate_vma_*() and adds nouveau SVM and HMM selftests as consumers. Earlier versions were posted previously [1] and [2]. The patches apply cleanly to the linux-mm 5.10.0-rc2 tree. There are a lot of other THP patches being posted. I don't think there are any semantic conflicts but there may be some merge conflicts depending on

This series adds support for transparent huge page migration to migrate_vma_*() and adds nouveau SVM and HMM selftests as consumers. An earlier version was posted previously [1]. This version now supports splitting a THP midway in the migration process which led to a number of changes. The patches apply cleanly to the current linux-mm tree. Since there are a couple of patches in linux-mm from Dan

...ing 0 from nouveau_dmem_migrate_to_ram > - minor style fixes > - add a new patch to remove CONFIG_MIGRATE_VMA_HELPER > > Changes since v1: > - fix a few whitespace issues > - drop the patch to remove MIGRATE_PFN_WRITE for now > - various spelling fixes > - clear cpages and npages in migrate_vma_setup > - fix the nouveau_dmem_fault_copy_one return value > - minor improvements to some nouveau internal calling conventions > Some of the patches seem to have been mangled in the mail. I was able to edit them and apply to Jason's tree https://github....

...mmu_notifier.h> #include <linux/memory_hotplug.h> -#if IS_ENABLED(CONFIG_HMM_MIRROR) static const struct mmu_notifier_ops hmm_mmu_notifier_ops; static inline struct hmm *mm_get_hmm(struct mm_struct *mm) @@ -1326,4 +1325,3 @@ long hmm_range_dma_unmap(struct hmm_range *range, return cpages; } EXPORT_SYMBOL(hmm_range_dma_unmap); -#endif /* IS_ENABLED(CONFIG_HMM_MIRROR) */ -- 2.20.1

...o system memory and check them. */ + for (i = 0, ptr = buffer->ptr; i < size / (2 * sizeof(*ptr)); ++i) + ASSERT_EQ(ptr[i], i); + + /* Migrate memory to the device again. */ + ret = hmm_dmirror_cmd(self->fd, HMM_DMIRROR_MIGRATE, buffer, npages); + ASSERT_EQ(ret, 0); + ASSERT_EQ(buffer->cpages, npages); + + /* Check what the device read. */ + for (i = 0, ptr = buffer->mirror; i < size / sizeof(*ptr); ++i) ASSERT_EQ(ptr[i], i); hmm_buffer_free(buffer); -- 2.20.1

...c +++ b/mm/hmm.c @@ -26,7 +26,6 @@ #include <linux/mmu_notifier.h> #include <linux/memory_hotplug.h> -#if IS_ENABLED(CONFIG_HMM_MIRROR) static const struct mmu_notifier_ops hmm_mmu_notifier_ops; /** @@ -1289,4 +1288,3 @@ long hmm_range_dma_unmap(struct hmm_range *range, return cpages; } EXPORT_SYMBOL(hmm_range_dma_unmap); -#endif /* IS_ENABLED(CONFIG_HMM_MIRROR) */ -- 2.20.1

These patches apply to linux-5.8.0-rc1. Patches 1-3 should probably go into 5.8, the others can be queued for 5.9. Patches 4-6 improve the HMM self tests. Patch 7-8 prepare nouveau for the meat of this series which adds support and testing for compound page mapping of system memory (patches 9-11) and compound page migration to device private memory (patches 12-16). Since these changes are split