search for: vm_pfnmmap

...can use it? Its not using the function directly, I just re-iterated the sequence of functions above. (do_set_pte -> page_add_file_rmap) gets called after we grab the page from driver through (__do_fault->vma->vm_ops->fault()). > Do you use vm_insert_pfn? > What type your vma is? VM_PFNMMAP or VM_MIXEDMAP? I dont use vm_insert_pfn(). Here is the sequence of events how the user space VMA gets the non LRU pages from the driver. - Driver registers a character device with 'struct file_operations' binding - Then the 'fops->mmap()' just binds the incoming 'struct vm...

...can use it? Its not using the function directly, I just re-iterated the sequence of functions above. (do_set_pte -> page_add_file_rmap) gets called after we grab the page from driver through (__do_fault->vma->vm_ops->fault()). > Do you use vm_insert_pfn? > What type your vma is? VM_PFNMMAP or VM_MIXEDMAP? I dont use vm_insert_pfn(). Here is the sequence of events how the user space VMA gets the non LRU pages from the driver. - Driver registers a character device with 'struct file_operations' binding - Then the 'fops->mmap()' just binds the incoming 'struct vm...

...rectly, I just re-iterated the sequence of functions >> above. (do_set_pte -> page_add_file_rmap) gets called after we grab the page from >> driver through (__do_fault->vma->vm_ops->fault()). >> >>> Do you use vm_insert_pfn? >>> What type your vma is? VM_PFNMMAP or VM_MIXEDMAP? >> >> I dont use vm_insert_pfn(). Here is the sequence of events how the user space >> VMA gets the non LRU pages from the driver. >> >> - Driver registers a character device with 'struct file_operations' binding >> - Then the 'fops-&g...

...rectly, I just re-iterated the sequence of functions >> above. (do_set_pte -> page_add_file_rmap) gets called after we grab the page from >> driver through (__do_fault->vma->vm_ops->fault()). >> >>> Do you use vm_insert_pfn? >>> What type your vma is? VM_PFNMMAP or VM_MIXEDMAP? >> >> I dont use vm_insert_pfn(). Here is the sequence of events how the user space >> VMA gets the non LRU pages from the driver. >> >> - Driver registers a character device with 'struct file_operations' binding >> - Then the 'fops-&g...

On 06/15/2016 08:02 AM, Minchan Kim wrote: > Hi, > > On Mon, Jun 13, 2016 at 03:08:19PM +0530, Anshuman Khandual wrote: >> > On 05/31/2016 05:31 AM, Minchan Kim wrote: >>> > > @@ -791,6 +921,7 @@ static int __unmap_and_move(struct page *page, struct page *newpage, >>> > > int rc = -EAGAIN; >>> > > int page_was_mapped = 0;

On 06/15/2016 08:02 AM, Minchan Kim wrote: > Hi, > > On Mon, Jun 13, 2016 at 03:08:19PM +0530, Anshuman Khandual wrote: >> > On 05/31/2016 05:31 AM, Minchan Kim wrote: >>> > > @@ -791,6 +921,7 @@ static int __unmap_and_move(struct page *page, struct page *newpage, >>> > > int rc = -EAGAIN; >>> > > int page_was_mapped = 0;

...g the function directly, I just re-iterated the sequence of functions > above. (do_set_pte -> page_add_file_rmap) gets called after we grab the page from > driver through (__do_fault->vma->vm_ops->fault()). > > > Do you use vm_insert_pfn? > > What type your vma is? VM_PFNMMAP or VM_MIXEDMAP? > > I dont use vm_insert_pfn(). Here is the sequence of events how the user space > VMA gets the non LRU pages from the driver. > > - Driver registers a character device with 'struct file_operations' binding > - Then the 'fops->mmap()' just bin...

...e table through f_ops->mmap() and vmops->fault() which then updates > the file RMAP (page->mapping->i_mmap) through page_add_file_rmap(page). One thing Hmm, page_add_file_rmap is not exported function. How does your driver can use it? Do you use vm_insert_pfn? What type your vma is? VM_PFNMMAP or VM_MIXEDMAP? I want to make dummy driver to simulate your case. It would be very helpful to implement/test pte-mapped non-lru page migration feature. That's why I ask now. > to note here is that the page->mapping eventually points to struct address_space > (file->f_mapping) whi...

...d the sequence of functions > >> above. (do_set_pte -> page_add_file_rmap) gets called after we grab the page from > >> driver through (__do_fault->vma->vm_ops->fault()). > >> > >>> Do you use vm_insert_pfn? > >>> What type your vma is? VM_PFNMMAP or VM_MIXEDMAP? > >> > >> I dont use vm_insert_pfn(). Here is the sequence of events how the user space > >> VMA gets the non LRU pages from the driver. > >> > >> - Driver registers a character device with 'struct file_operations' binding > &g...

...of functions >>>> above. (do_set_pte -> page_add_file_rmap) gets called after we grab the page from >>>> driver through (__do_fault->vma->vm_ops->fault()). >>>> >>>>> Do you use vm_insert_pfn? >>>>> What type your vma is? VM_PFNMMAP or VM_MIXEDMAP? >>>> >>>> I dont use vm_insert_pfn(). Here is the sequence of events how the user space >>>> VMA gets the non LRU pages from the driver. >>>> >>>> - Driver registers a character device with 'struct file_operations'...

...of functions >>>> above. (do_set_pte -> page_add_file_rmap) gets called after we grab the page from >>>> driver through (__do_fault->vma->vm_ops->fault()). >>>> >>>>> Do you use vm_insert_pfn? >>>>> What type your vma is? VM_PFNMMAP or VM_MIXEDMAP? >>>> >>>> I dont use vm_insert_pfn(). Here is the sequence of events how the user space >>>> VMA gets the non LRU pages from the driver. >>>> >>>> - Driver registers a character device with 'struct file_operations'...