search for: backing_dev_info

Hi all, This patchset makes some key modifications to the original ''stable page writes'' patchset. First, it provides users (devices and filesystems) of a backing_dev_info the ability to declare whether or not it is necessary to ensure that page contents cannot change during writeout, whereas the current code assumes that this is true. Second, it relaxes the wait_on_page_writeback calls so that they only occur if something needs it. Third, it fixes up (most) of the...

...ys_getdents (fd=<value optimized out>, dirent=0x1f61468, count=32768) at fs/readdir.c:214 #6 0xffffffff810279ab in ?? () at arch/x86/kernel/entry_64.S:479 #7 0x00007f8b23d1a4c5 in ?? () #8 0x00000000000002bb in ?? () #9 0x0000000000000000 in ?? () (gdb) p bdi $1 = (struct backing_dev_info *) 0x0 (gdb) p inode->i_mapping->backing_dev_info $15 = (struct backing_dev_info *) 0xffff880078878d48 (gdb) p inode->i_sb->s_bdi $16 = (struct backing_dev_info *) 0x0 I can''t do git bisect because on n''th step my system became unbootabl...

''bh'' is forgot to release if no error is detected Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> --- fs/btrfs/volumes.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 8b9fb8c..69fc902 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -631,6 +631,7 @@ static int

...PAGE_CACHE_SIZE / (sizeof(struct page *))); pinned[0] = NULL; pinned[1] = NULL; if (file->f_flags & O_DIRECT) return -EINVAL; pos = *ppos; start_pos = pos; vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE); current->backing_dev_info = inode->i_mapping->backing_dev_info; err = generic_write_checks(file, &pos, &count, S_ISBLK(inode->i_mode)); if (err) goto out_nolock; if (count == 0) goto out_nolock; err = remove_suid(fdentry(file)); <--- -- Da...

...(direct_io) { - written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos, - ppos, count, ocount); + written = generic_file_direct_write_iter(iocb, iter, *ppos, + ppos, count); if (written < 0) { ret = written; goto out_dio; } } else { current->backing_dev_info = file->f_mapping->backing_dev_info; - written = generic_file_buffered_write(iocb, iov, nr_segs, *ppos, - ppos, count, 0); + written = generic_file_buffered_write_iter(iocb, iter, *ppos, + ppos, count, 0); current->backing_dev_info = NULL; } @@ -2520,7 +2514,7...

...(direct_io) { - written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos, - ppos, count, ocount); + written = generic_file_direct_write_iter(iocb, iter, *ppos, + ppos, count); if (written < 0) { ret = written; goto out_dio; } } else { current->backing_dev_info = file->f_mapping->backing_dev_info; - written = generic_file_buffered_write(iocb, iov, nr_segs, *ppos, - ppos, count, 0); + written = generic_file_buffered_write_iter(iocb, iter, *ppos, + ppos, count, 0); current->backing_dev_info = NULL; } @@ -2524,7 +2518,7...

Memory fragmentation introduced by ballooning might reduce significantly the number of 2MB contiguous memory blocks that can be used within a guest, thus imposing performance penalties associated with the reduced number of transparent huge pages that could be used by the guest workload. This patch-set follows the main idea discussed at 2012 LSFMMS session: "Ballooning for transparent huge

Memory fragmentation introduced by ballooning might reduce significantly the number of 2MB contiguous memory blocks that can be used within a guest, thus imposing performance penalties associated with the reduced number of transparent huge pages that could be used by the guest workload. This patch-set follows the main idea discussed at 2012 LSFMMS session: "Ballooning for transparent huge

...) > disk->major = MAJOR(devt); > disk->first_minor = MINOR(devt); > > - disk_alloc_events(disk); > + retval = disk_alloc_events(disk); > + if (retval) > + goto fail; > > /* Register BDI before referencing it from bdev */ > bdi = &disk->queue->backing_dev_info; > - bdi_register_owner(bdi, disk_to_dev(disk)); > + retval = bdi_register_owner(bdi, disk_to_dev(disk)); > + if (retval) > + goto fail; > > - blk_register_region(disk_devt(disk), disk->minors, NULL, > - exact_match, exact_lock, disk); > - register_disk(parent, di...

...) > disk->major = MAJOR(devt); > disk->first_minor = MINOR(devt); > > - disk_alloc_events(disk); > + retval = disk_alloc_events(disk); > + if (retval) > + goto fail; > > /* Register BDI before referencing it from bdev */ > bdi = &disk->queue->backing_dev_info; > - bdi_register_owner(bdi, disk_to_dev(disk)); > + retval = bdi_register_owner(bdi, disk_to_dev(disk)); > + if (retval) > + goto fail; > > - blk_register_region(disk_devt(disk), disk->minors, NULL, > - exact_match, exact_lock, disk); > - register_disk(parent, di...

...registers the partitioning information in @disk * with the kernel. * - * FIXME: error handling + * RETURNS: + * 0 on success, -errno on failure. */ -void device_add_disk(struct device *parent, struct gendisk *disk) +int device_add_disk(struct device *parent, struct gendisk *disk) { struct backing_dev_info *bdi; dev_t devt; @@ -613,10 +614,8 @@ void device_add_disk(struct device *parent, struct gendisk *disk) disk->flags |= GENHD_FL_UP; retval = blk_alloc_devt(&disk->part0, &devt); - if (retval) { - WARN_ON(1); - return; - } + if (retval) + goto fail; disk_to_dev(disk)->...

...; > > > > > > - disk_alloc_events(disk); > > > + retval = disk_alloc_events(disk); > > > + if (retval) > > > + goto fail; > > > > > > /* Register BDI before referencing it from bdev */ > > > bdi = &disk->queue->backing_dev_info; > > > - bdi_register_owner(bdi, disk_to_dev(disk)); > > > + retval = bdi_register_owner(bdi, disk_to_dev(disk)); > > > + if (retval) > > > + goto fail; > > > > > > - blk_register_region(disk_devt(disk), disk->minors, NULL, > > > -...

...; > > > > > > - disk_alloc_events(disk); > > > + retval = disk_alloc_events(disk); > > > + if (retval) > > > + goto fail; > > > > > > /* Register BDI before referencing it from bdev */ > > > bdi = &disk->queue->backing_dev_info; > > > - bdi_register_owner(bdi, disk_to_dev(disk)); > > > + retval = bdi_register_owner(bdi, disk_to_dev(disk)); > > > + if (retval) > > > + goto fail; > > > > > > - blk_register_region(disk_devt(disk), disk->minors, NULL, > > > -...

This patchset follows the main idea discussed at 2012 LSFMMS section: "Ballooning for transparent huge pages" -- http://lwn.net/Articles/490114/ to introduce the required changes to the virtio_balloon driver, as well as changes to the core compaction & migration bits, in order to allow memory balloon pages become movable within a guest. Rafael Aquini (4): mm: introduce compaction

This patchset follows the main idea discussed at 2012 LSFMMS section: "Ballooning for transparent huge pages" -- http://lwn.net/Articles/490114/ to introduce the required changes to the virtio_balloon driver, as well as changes to the core compaction & migration bits, in order to allow memory balloon pages become movable within a guest. Rafael Aquini (4): mm: introduce compaction

Memory fragmentation introduced by ballooning might reduce significantly the number of 2MB contiguous memory blocks that can be used within a guest, thus imposing performance penalties associated with the reduced number of transparent huge pages that could be used by the guest workload. This patchset follows the main idea discussed at 2012 LSFMMS section: "Ballooning for transparent huge

Memory fragmentation introduced by ballooning might reduce significantly the number of 2MB contiguous memory blocks that can be used within a guest, thus imposing performance penalties associated with the reduced number of transparent huge pages that could be used by the guest workload. This patchset follows the main idea discussed at 2012 LSFMMS section: "Ballooning for transparent huge

This patchset follows the main idea discussed at 2012 LSFMMS section: "Ballooning for transparent huge pages" -- http://lwn.net/Articles/490114/ to introduce the required changes to the virtio_balloon driver, as well as changes to the core compaction & migration bits, in order to allow memory balloon pages become movable within a guest. Rafael Aquini (4): mm: introduce compaction

This patchset follows the main idea discussed at 2012 LSFMMS section: "Ballooning for transparent huge pages" -- http://lwn.net/Articles/490114/ to introduce the required changes to the virtio_balloon driver, as well as changes to the core compaction & migration bits, in order to allow memory balloon pages become movable within a guest. Rafael Aquini (4): mm: introduce compaction

...gt; disk->first_minor = MINOR(devt); > > > > - disk_alloc_events(disk); > > + retval = disk_alloc_events(disk); > > + if (retval) > > + goto fail; > > > > /* Register BDI before referencing it from bdev */ > > bdi = &disk->queue->backing_dev_info; > > - bdi_register_owner(bdi, disk_to_dev(disk)); > > + retval = bdi_register_owner(bdi, disk_to_dev(disk)); > > + if (retval) > > + goto fail; > > > > - blk_register_region(disk_devt(disk), disk->minors, NULL, > > - exact_match, exact_lock, dis...