search for: try_to_unmap_on

...moves of a page from the page cache due to concurrent discard faults and/or normal page removals. It also prevents the re-add of isolated pages to the lru list in vmscan if the page has been discarded while it was not on the lru list. Another noticable change is that the first few lines of code in try_to_unmap_one that calculates the address from the page and the vma is moved out of try_to_unmap_one to the callers. This is done to make try_to_unmap_one usable for the removal of discarded pages in page_unmap_all. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> --- fs/buffer.c...

...moves of a page from the page cache due to concurrent discard faults and/or normal page removals. It also prevents the re-add of isolated pages to the lru list in vmscan if the page has been discarded while it was not on the lru list. Another noticable change is that the first few lines of code in try_to_unmap_one that calculates the address from the page and the vma is moved out of try_to_unmap_one to the callers. This is done to make try_to_unmap_one usable for the removal of discarded pages in page_unmap_all. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> --- fs/buffer.c...

Greetings, after Carsten pitched CMM2 on the kvm mini summit here is a repost of version 5 of the guest page hinting patches. The code is still the same but has been adapted to the latest git level. -- blue skies, Martin. "Reality continues to ruin my life." - Calvin.

Greetings, after Carsten pitched CMM2 on the kvm mini summit here is a repost of version 5 of the guest page hinting patches. The code is still the same but has been adapted to the latest git level. -- blue skies, Martin. "Reality continues to ruin my life." - Calvin.

...make_pages_present has to check for the host page state besides making the pages present in the linux page table. This is done by a call to get_user_pages with a pages parameter. Since the VM_LOCKED bit of the vma will be set prior to the call to get_user_pages an additional check is needed in the try_to_unmap_one function. If get_user_pages finds a discarded page it needs to remove the page from the page cache and all page tables dispite the fact that VM_LOCKED is set. After get_user_pages is back the pages are stable. The references to the pages can be returned immediatly, the pages will stay in stable be...

...make_pages_present has to check for the host page state besides making the pages present in the linux page table. This is done by a call to get_user_pages with a pages parameter. Since the VM_LOCKED bit of the vma will be set prior to the call to get_user_pages an additional check is needed in the try_to_unmap_one function. If get_user_pages finds a discarded page it needs to remove the page from the page cache and all page tables dispite the fact that VM_LOCKED is set. After get_user_pages is back the pages are stable. The references to the pages can be returned immediatly, the pages will stay in stable be...

After way to many months here is the fifth version of the guest page hinting patches. Compared to version four a few improvements have been added: - Avoid page_host_discards() calls outside of page-states.h - The discard list is now implemented via the page_free_discarded hook and architecture specific code. - PG_state_change page flag has been replaced with architecture specficic

After way to many months here is the fifth version of the guest page hinting patches. Compared to version four a few improvements have been added: - Avoid page_host_discards() calls outside of page-states.h - The discard list is now implemented via the page_free_discarded hook and architecture specific code. - PG_state_change page flag has been replaced with architecture specficic

...9;t return the valid state from hmm_range_unregister > - additional nouveau cleanups > I ran some OpenCL tests from Jerome with nouveau and this series, 5.3.0-rc1, and my two HMM fixes: ("mm/hmm: fix ZONE_DEVICE anon page mapping reuse") ("mm/hmm: Fix bad subpage pointer in try_to_unmap_one") You can add for the series: Tested-by: Ralph Campbell <rcampbell at nvidia.com>

Hi Jérôme, Ben and Jason, below is a series against the hmm tree which fixes up the mmap_sem locking in nouveau and while at it also removes leftover legacy HMM APIs only used by nouveau. The first 4 patches are a bug fix for nouveau, which I suspect should go into this merge window even if the code is marked as staging, just to avoid people copying the breakage. Changes since v1: - don't

...anon_vma *anon_vma; + struct vm_area_struct *vma; + unsigned long address; + + anon_vma = page_lock_anon_vma(page); + if (!anon_vma) + return; + list_for_each_entry(vma, &anon_vma->head, anon_vma_node) { + address = vma_address(page, vma); + if (address == -EFAULT) + continue; + BUG_ON(try_to_unmap_one(page, vma, address, 0) == SWAP_FAIL); + } + spin_unlock(&anon_vma->lock); +} + +/** + * page_unmap_all - removes all mappings of a page + * + * @page: the page which mapping in the vma should be struck down + * + * the caller needs to hold page lock + */ +void page_unmap_all(struct page *pa...

...anon_vma *anon_vma; + struct vm_area_struct *vma; + unsigned long address; + + anon_vma = page_lock_anon_vma(page); + if (!anon_vma) + return; + list_for_each_entry(vma, &anon_vma->head, anon_vma_node) { + address = vma_address(page, vma); + if (address == -EFAULT) + continue; + BUG_ON(try_to_unmap_one(page, vma, address, 0) == SWAP_FAIL); + } + spin_unlock(&anon_vma->lock); +} + +/** + * page_unmap_all - removes all mappings of a page + * + * @page: the page which mapping in the vma should be struck down + * + * the caller needs to hold page lock + */ +void page_unmap_all(struct page *pa...

...and mapping is racy */ - page_make_volatile(page, 1); } /* @@ -566,7 +565,6 @@ void page_add_file_rmap(struct page *pag { if (atomic_inc_and_test(&page->_mapcount)) __inc_zone_page_state(page, NR_FILE_MAPPED); - page_make_volatile(page, 1); } /** @@ -694,7 +692,7 @@ static int try_to_unmap_one(struct page page_remove_rmap(page); - page_cache_release(page); + page_cache_release_nocheck(page); out_unmap: pte_unmap_unlock(pte, ptl); diff -urpN linux-2.6/mm/swap.c linux-2.6-patched/mm/swap.c --- linux-2.6/mm/swap.c 2006-09-01 12:49:33.000000000 +0200 +++ linux-2.6-patched/mm/swa...

...and mapping is racy */ - page_make_volatile(page, 1); } /* @@ -566,7 +565,6 @@ void page_add_file_rmap(struct page *pag { if (atomic_inc_and_test(&page->_mapcount)) __inc_zone_page_state(page, NR_FILE_MAPPED); - page_make_volatile(page, 1); } /** @@ -694,7 +692,7 @@ static int try_to_unmap_one(struct page page_remove_rmap(page); - page_cache_release(page); + page_cache_release_nocheck(page); out_unmap: pte_unmap_unlock(pte, ptl); diff -urpN linux-2.6/mm/swap.c linux-2.6-patched/mm/swap.c --- linux-2.6/mm/swap.c 2006-09-01 12:49:33.000000000 +0200 +++ linux-2.6-patched/mm/swa...

Greetings, the circus is back in town -- another version of the guest page hinting patches. The patches differ from version 6 only in the kernel version, they apply against 2.6.29. My short sniff test showed that the code is still working as expected. To recap (you can skip this if you read the boiler plate of the last version of the patches): The main benefit for guest page hinting vs. the

Greetings, the circus is back in town -- another version of the guest page hinting patches. The patches differ from version 6 only in the kernel version, they apply against 2.6.29. My short sniff test showed that the code is still working as expected. To recap (you can skip this if you read the boiler plate of the last version of the patches): The main benefit for guest page hinting vs. the

Greetings, the circus is back in town -- another version of the guest page hinting patches. The patches differ from version 6 only in the kernel version, they apply against 2.6.29. My short sniff test showed that the code is still working as expected. To recap (you can skip this if you read the boiler plate of the last version of the patches): The main benefit for guest page hinting vs. the

...continue; } + page = migrate_pfn_to_page(migrate->src[i]); if (!page) { if (!(migrate->src[i] & MIGRATE_PFN_MIGRATE)) continue; diff --git a/mm/rmap.c b/mm/rmap.c index 1b84945d655c..13eb0247d8b7 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -1497,7 +1497,7 @@ static bool try_to_unmap_one(struct page *page, struct vm_area_struct *vma, } if (IS_ENABLED(CONFIG_MIGRATION) && - (flags & TTU_MIGRATION) && + (flags & (TTU_MIGRATION | TTU_SPLIT_FREEZE)) && is_zone_device_page(page)) { swp_entry_t entry; pte_t swp_pte; -- 2....

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

I''m sure everyone has seen the drop of VMI patches for Linux at this point, but just in case, the link is included below. I''ve read this version of the VMI spec and have made my way through most of the patches. While I wasn''t really that impressed with the first spec wrt Xen, the second version seems to be much more palatable. Specifically, the code inlining and