Re: [PATCH 1/3] xfs: pass alloc flags through to xfs_extent_busy_flush()

[Dave Chinner <david@fromorbit.com>]

On Thu, Jun 15, 2023 at 09:57:18PM +0000, Wengang Wang wrote:
> Hi Dave,
> 
> I got this error when applying this patch to the newest code:
> (I tried on both MacOS and OL8, it’s the same result)
> 
> $ patch -p1 <~/tmp/Dave1.txt
> patching file 'fs/xfs/libxfs/xfs_alloc.c'
> patch: **** malformed patch at line 27:  */

Whoa. I haven't use patch like this for a decade. :)

The way all the cool kids do this now is apply the entire series to
directly to a git tree branch with b4:

$ b4 am -o - 20230615014201.3171380-2-david@fromorbit.com | git am

(b4 shazam merges the b4 am and git am operations into the one
command, IIRC, but that trick isn't automatic for me yet :)
> Looking at the patch to see the line numbers:
> 
>  22 diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c
>  23 index c20fe99405d8..11bd0a1756a1 100644
>  24 --- a/fs/xfs/libxfs/xfs_alloc.c
>  25 +++ b/fs/xfs/libxfs/xfs_alloc.c
>  26 @@ -1536,7 +1536,8 @@ xfs_alloc_ag_vextent_lastblock(
>  27  */
>  28 STATIC int
>  29 xfs_alloc_ag_vextent_near(

Yup, however you saved the patch to a file stripped the leading
spaces from all the lines in the patch.

If you look at the raw email on lore it has the correct leading
spaces in the patch.

https://lore.kernel.org/linux-xfs/20230615014201.3171380-2-david@fromorbit.com/raw

These sorts of patching problems go away when you use tools like b4
to pull the patches directly from the mailing list...

> > On Jun 14, 2023, at 6:41 PM, Dave Chinner <david@fromorbit.com> wrote:
> > 
> > From: Dave Chinner <dchinner@redhat.com>
> > 
> > To avoid blocking in xfs_extent_busy_flush() when freeing extents
> > and the only busy extents are held by the current transaction, we
> > need to pass the XFS_ALLOC_FLAG_FREEING flag context all the way
> > into xfs_extent_busy_flush().
> > 
> > Signed-off-by: Dave Chinner <dchinner@redhat.com>
> > ---
> > fs/xfs/libxfs/xfs_alloc.c | 96 +++++++++++++++++++++------------------
> > fs/xfs/libxfs/xfs_alloc.h |  2 +-
> > fs/xfs/xfs_extent_busy.c  |  3 +-
> > fs/xfs/xfs_extent_busy.h  |  2 +-
> > 4 files changed, 56 insertions(+), 47 deletions(-)
> > 
> > diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c
> > index c20fe99405d8..11bd0a1756a1 100644
> > --- a/fs/xfs/libxfs/xfs_alloc.c
> > +++ b/fs/xfs/libxfs/xfs_alloc.c
> > @@ -1536,7 +1536,8 @@ xfs_alloc_ag_vextent_lastblock(
> >  */
> > STATIC int
> > xfs_alloc_ag_vextent_near(
> > - struct xfs_alloc_arg *args)
> > + struct xfs_alloc_arg *args,
> > + uint32_t alloc_flags)
> > {
> > struct xfs_alloc_cur acur = {};
> > int error; /* error code */

This indicates the problem is likely to be your mail program,
because the quoting it has done here has completely mangled all the
whitespace in the patch....

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com