Re: [PATCH/RFC] make btrfs subvol mounts appear in /proc/mounts

On Tue, Nov 03 2015, Chris Mason wrote: > On Mon, Nov 02, 2015 at 03:50:12PM -0500, J. Bruce Fields wrote: >> On Wed, Oct 28, 2015 at 07:25:10AM +0900, Neil Brown wrote: >> > >> > If you create a subvolume in btrfs and access it (by name) without >> > mounti

Re: [PATCH v5 8/9] vfs: Add vfs_copy_file_range() support for pagecache copies

Anna Schumaker writes: > @@ -1338,34 +1362,26 @@ ssize_t vfs_copy_file_range(struct file *file_in, > loff_t pos_in, > struct file *file_out, loff_t pos_out, > size_t len, unsigned int flags) > { > - struct inode

Re: [PATCH 1/3] BTRFS: support NFSv2 export

David Sterba writes: > On Fri, May 08, 2015 at 10:16:23AM +1000, NeilBrown wrote: >> The "fh_len" passed to ->fh_to_* is not guaranteed to be that same as >> that returned by encode_fh - it may be larger. >> >> With NFSv2, the filehandle is fixed length, so it may appear longer

Re: [dm-devel] [PATCH] block: add a bi_error field to struct bio

On Wed, 3 Jun 2015 15:42:39 +0200 Christoph Hellwig h...@lst.de wrote: Currently we have two different ways to signal an I/O error on a BIO: (1) by clearing the BIO_UPTODATE flag (2) by returning a Linux errno value to the bi_end_io callback The first one has the drawback of only

Re: What to do about subvolumes?

On Mon, 6 Dec 2010 11:48:45 -0500 J. Bruce Fields bfie...@redhat.com wrote: On Fri, Dec 03, 2010 at 04:01:44PM -0700, Andreas Dilger wrote: On 2010-12-03, at 15:45, J. Bruce Fields wrote: We're using statfs64.fs_fsid for this; I believe that's both stable across reboots and distinguishes

Re: [patch v2 1/5] mm: add nofail variants of kmalloc kcalloc and kzalloc

On Thu, 2 Sep 2010 16:51:41 +0200 Jan Kara j...@suse.cz wrote: On Thu 02-09-10 09:59:13, Jiri Slaby wrote: On 09/02/2010 03:02 AM, David Rientjes wrote: --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -334,6 +334,57 @@ static inline void *kzalloc_node(size_t size, gfp_t flags,

Re: [PATCH] Improve support for exporting btrfs subvolumes.

On Wed, 23 Jun 2010 14:28:38 -0400 J. Bruce Fields bfie...@fieldses.org wrote: On Thu, Jun 17, 2010 at 02:54:01PM +1000, Neil Brown wrote: If you export two subvolumes of a btrfs filesystem, they will both be given the same uuid so lookups will be confused. blkid cannot differentiate

[PATCH] Improve support for exporting btrfs subvolumes.

If you export two subvolumes of a btrfs filesystem, they will both be given the same uuid so lookups will be confused. blkid cannot differentiate the two, so we must use the fsid from statfs64 to identify the filesystem. We cannot tell if blkid or statfs is best without knowing internal details

Re: NFS exporting btrfs subvolumes.

On Tue, 01 Jun 2010 23:56:20 -0400 Trond Myklebust trond.mykleb...@fys.uio.no wrote: On Wed, 2010-06-02 at 13:41 +1000, Neil Brown wrote: NFS needs a unique identifier for a filesystem to be able to export it. snip Can anyone suggest a better way to get a good uuid for a btrfs filesystem