Btrfs devel - Aug 2013 - Re: [PATCH v2] btrfs: add mount option to set commit interval

> > Another newbie question is which version of the kernel do I need to
> > have in order to cleanly apply this patch?  I am finding that it fails
> > to apply to the current stable kernel code (as of now it is v3.10.4)
> > which makes me think your patch has to be applied to a newer one?  Are
> > you patching against the linux git tree meaning I have to use the 3.11
> > series to try your code?
> 
> Try Josef''s btrfs-next repo:
> 
>
 https://btrfs.wiki.kernel.org/index.php/Btrfs_source_repositories#Integration_repository_.28btrfs-next.29
OK!  I can patch successfully into that git repo:

% cd /tmp/work
% git clone git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-next.git
% cd btrfs
% patch -Np1 -i btrfs_add_mount_option_to_set_commit_interval.patch
patching file fs/btrfs/ctree.h
patching file fs/btrfs/disk-io.c
patching file fs/btrfs/super.c
Hunk #3 succeeded at 647 (offset 19 lines).
Hunk #4 succeeded at 1006 with fuzz 1 (offset 39 lines).

If I am not mistaken, btrfs-next is the entire kernel''s code?  The wiki
suggests running anything compiled therein from the build dir.  If I want to
compile this into the official 3.10.4 tree, how can I do it?
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On Sat, Aug 03, 2013 at 07:39:01AM -0400, Mike Audia
wrote:
> > > Another newbie question is which version of the kernel do I need
to
> > > have in order to cleanly apply this patch?  I am finding that it
fails
> > > to apply to the current stable kernel code (as of now it is
v3.10.4)
> > > which makes me think your patch has to be applied to a newer one?
 Are
> > > you patching against the linux git tree meaning I have to use the
3.11
> > > series to try your code?
> > 
> > Try Josef''s btrfs-next repo:
> > 
> >
 https://btrfs.wiki.kernel.org/index.php/Btrfs_source_repositories#Integration_repository_.28btrfs-next.29
> 
> OK!  I can patch successfully into that git repo:
> 
> % cd /tmp/work
> % git clone
git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-next.git
> % cd btrfs
> % patch -Np1 -i btrfs_add_mount_option_to_set_commit_interval.patch
> patching file fs/btrfs/ctree.h
> patching file fs/btrfs/disk-io.c
> patching file fs/btrfs/super.c
> Hunk #3 succeeded at 647 (offset 19 lines).
> Hunk #4 succeeded at 1006 with fuzz 1 (offset 39 lines).
> If I am not mistaken, btrfs-next is the entire kernel''s code?  The
> wiki suggests running anything compiled therein from the build dir.
   That''ll be for the userspace tools, not the kernel. Obviously, one
doesn''t tend to run kernels from the command line. :)
>  If I want to compile this into the official 3.10.4 tree, how can I
> do it?
   Add the "official" kernel repo as a remote to the same git repo
(with git remote add), fetch that repo, create a new branch to work
in, based on the btrfs-next branch, then merge in the other branch (or
vice-versa).

   Note that btrfs-next is usually based on the latest released kernel
anyway, so that''s likely to be largely superfluous.

   Hugo.

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