search for: f_map

...hich gets mapped into user space process page 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 to note here is that the page->mapping eventually points to struct address_space (file->f_mapping) which belongs to the character device file (created using mknod) which we are using for establishing the mmap() regions in the user space. Now as per this new framework, all the page's are to be made __SetPageMovable before passing the list down to migrate_pages(). Now __SetPageMovable()...

...hich gets mapped into user space process page 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 to note here is that the page->mapping eventually points to struct address_space (file->f_mapping) which belongs to the character device file (created using mknod) which we are using for establishing the mmap() regions in the user space. Now as per this new framework, all the page's are to be made __SetPageMovable before passing the list down to migrate_pages(). Now __SetPageMovable()...

...the overriding problem of non-lru-mapped-page, I implemented dummy > driver as miscellaneous device and in test_mmap(file_operations.mmap), > I changed a_ops with my address_space_operations. > > int test_mmap(struct file *filp, struct vm_area_struct *vma) > { > filp->f_mapping->a_ops = &test_aops; > vma->vm_ops = &test_vm_ops; > vma->vm_private_data = filp->private_data; > return 0; > } > Okay. > test_aops should have *set_page_dirty* overriding. > > static int test_set_pag_dirty(struct page *pag...

...the overriding problem of non-lru-mapped-page, I implemented dummy > driver as miscellaneous device and in test_mmap(file_operations.mmap), > I changed a_ops with my address_space_operations. > > int test_mmap(struct file *filp, struct vm_area_struct *vma) > { > filp->f_mapping->a_ops = &test_aops; > vma->vm_ops = &test_vm_ops; > vma->vm_private_data = filp->private_data; > return 0; > } > Okay. > test_aops should have *set_page_dirty* overriding. > > static int test_set_pag_dirty(struct page *pag...

...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) which belongs to the character device file (created using mknod) > which we are using for establishing the mmap() regions in the user space. > > Now as per this new framework, all the page's are to be made __SetPageMovable before > passing the list down to migrate_pages(). Now...

On 06/16/2016 11:07 AM, Minchan Kim wrote: > On Thu, Jun 16, 2016 at 09:12:07AM +0530, Anshuman Khandual wrote: >> On 06/16/2016 05:56 AM, Minchan Kim wrote: >>> On Wed, Jun 15, 2016 at 12:15:04PM +0530, Anshuman Khandual wrote: >>>> On 06/15/2016 08:02 AM, Minchan Kim wrote: >>>>> Hi, >>>>> >>>>> On Mon, Jun 13, 2016 at

On 06/16/2016 11:07 AM, Minchan Kim wrote: > On Thu, Jun 16, 2016 at 09:12:07AM +0530, Anshuman Khandual wrote: >> On 06/16/2016 05:56 AM, Minchan Kim wrote: >>> On Wed, Jun 15, 2016 at 12:15:04PM +0530, Anshuman Khandual wrote: >>>> On 06/15/2016 08:02 AM, Minchan Kim wrote: >>>>> Hi, >>>>> >>>>> On Mon, Jun 13, 2016 at

...69d65d49837b..4b2ccaf1932e 100644 > --- a/fs/ext4/file.c > +++ b/fs/ext4/file.c > @@ -360,15 +360,16 @@ static const struct vm_operations_struct ext4_file_vm_ops = { > static int ext4_file_mmap(struct file *file, struct vm_area_struct *vma) > { > struct inode *inode = file->f_mapping->host; > + struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); > + struct dax_device *dax_dev = sbi->s_daxdev; > > - if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) > + if (unlikely(ext4_forced_shutdown(sbi))) > return -EIO; > > - /* > - * W...

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; > struct anon_vma *anon_vma = NULL; > + bool is_lru = !__PageMovable(page); > > if (!trylock_page(page)) { > if (!force || mode == MIGRATE_ASYNC) > @@ -871,6 +1002,11 @@ static

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; > struct anon_vma *anon_vma = NULL; > + bool is_lru = !__PageMovable(page); > > if (!trylock_page(page)) { > if (!force || mode == MIGRATE_ASYNC) > @@ -871,6 +1002,11 @@ static

..., 11 deletions(-) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index d17a04b..091593a 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -6589,31 +6589,33 @@ static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb, struct file *file = iocb->ki_filp; struct inode *inode = file->f_mapping->host; int flags = 0; - bool wakeup = false; + bool wakeup = true; int ret; if (check_direct_IO(BTRFS_I(inode)->root, rw, iocb, iov, offset, nr_segs)) return 0; - if (rw == READ) { - atomic_inc(&inode->i_dio_count); - smp_mb__after_atomic_inc(); - if (unlike...

Two patches follow this message. One fixes the default implementation of SEEK_HOLE/DATA. This patch applies atop Josef's last posted patch. The second patch implements the same on ocfs2. The test tool for the same is available here. http://oss.oracle.com/~smushran/seek_data/seek_test.c It is improved since the last post. It runs cleanly on zfs, ocfs2 and ext3 (default behavior). Users

Two patches follow this message. One fixes the default implementation of SEEK_HOLE/DATA. This patch applies atop Josef's last posted patch. The second patch implements the same on ocfs2. The test tool for the same is available here. http://oss.oracle.com/~smushran/seek_data/seek_test.c It is improved since the last post. It runs cleanly on zfs, ocfs2 and ext3 (default behavior). Users

...in case you need more information, please do let me know. > 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) which belongs to the character device file (created using mknod) >> which we are using for establishing the mmap() regions in the user space. >> >> Now as per this new framework, all the page's are to be made __SetPageMovable before >> passing the list down to migra...

...in case you need more information, please do let me know. > 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) which belongs to the character device file (created using mknod) >> which we are using for establishing the mmap() regions in the user space. >> >> Now as per this new framework, all the page's are to be made __SetPageMovable before >> passing the list down to migra...

...got truncated from under us? */ diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 594f07a..4f92651 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -1323,6 +1323,7 @@ static int fuse_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) */ struct inode *inode = vma->vm_file->f_mapping->host; + file_update_time(vma->vm_file); fuse_wait_on_page_writeback(inode, page->index); return 0; } diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c index edeb9e8..ba22704 100644 --- a/fs/gfs2/file.c +++ b/fs/gfs2/file.c @@ -359,6 +359,7 @@ static int gfs2_page_mkwrite(struct vm_a...

...rent real field issues. About the overriding problem of non-lru-mapped-page, I implemented dummy driver as miscellaneous device and in test_mmap(file_operations.mmap), I changed a_ops with my address_space_operations. int test_mmap(struct file *filp, struct vm_area_struct *vma) { filp->f_mapping->a_ops = &test_aops; vma->vm_ops = &test_vm_ops; vma->vm_private_data = filp->private_data; return 0; } test_aops should have *set_page_dirty* overriding. static int test_set_pag_dirty(struct page *page) { if (!PageDirty(page))...

...k.c --- linux-2.6/mm/mlock.c 2006-06-18 03:49:35.000000000 +0200 +++ linux-2.6-patched/mm/mlock.c 2006-09-01 12:50:24.000000000 +0200 @@ -60,6 +60,8 @@ success: */ pages = (end - start) >> PAGE_SHIFT; if (newflags & VM_LOCKED) { + if (vma->vm_file && vma->vm_file->f_mapping) + vma->vm_file->f_mapping->mlocked = 1; pages = -pages; if (!(newflags & VM_IO)) ret = make_pages_present(start, end); diff -urpN linux-2.6/mm/page-discard.c linux-2.6-patched/mm/page-discard.c --- linux-2.6/mm/page-discard.c 2006-09-01 12:50:24.000000000 +0200 +++ lin...

...k.c --- linux-2.6/mm/mlock.c 2006-06-18 03:49:35.000000000 +0200 +++ linux-2.6-patched/mm/mlock.c 2006-09-01 12:50:24.000000000 +0200 @@ -60,6 +60,8 @@ success: */ pages = (end - start) >> PAGE_SHIFT; if (newflags & VM_LOCKED) { + if (vma->vm_file && vma->vm_file->f_mapping) + vma->vm_file->f_mapping->mlocked = 1; pages = -pages; if (!(newflags & VM_IO)) ret = make_pages_present(start, end); diff -urpN linux-2.6/mm/page-discard.c linux-2.6-patched/mm/page-discard.c --- linux-2.6/mm/page-discard.c 2006-09-01 12:50:24.000000000 +0200 +++ lin...

.../file.c b/fs/ext4/file.c index 69d65d49837b..86e4bf464320 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -360,8 +360,10 @@ static const struct vm_operations_struct ext4_file_vm_ops = { static int ext4_file_mmap(struct file *file, struct vm_area_struct *vma) { struct inode *inode = file->f_mapping->host; + struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); + struct dax_device *dax_dev = sbi->s_daxdev; - if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) + if (unlikely(ext4_forced_shutdown(sbi))) return -EIO; /* @@ -371,6 +373,13 @@ static int ext4_file_mmap(stru...