[Cluster-devel] [GFS2 PATCH 06/15] GFS2: Prevent gl_delete work for re-used inodes

[Bob Peterson <rpeterso@redhat.com>]

----- Original Message -----
> Bob Peterson <rpeterso@redhat.com> writes:
> 
> > This patch adds a new glock flag GLF_INODE_DELETING which signifies
> > when a glock is being used to change an inode from unlinked to
> > deleted. The flag is used in a few places:
> 
> This is the change I made to what we're testing:
> 
> diff --git a/fs/gfs2/trace_gfs2.h b/fs/gfs2/trace_gfs2.h
> index 20c007d..80f2ee7 100644
> --- a/fs/gfs2/trace_gfs2.h
> +++ b/fs/gfs2/trace_gfs2.h
> @@ -57,7 +57,8 @@
>         {(1UL << GLF_QUEUED),                   "q" },          \
>         {(1UL << GLF_LRU),                      "L" },          \
>         {(1UL << GLF_OBJECT),                   "o" },          \
> -       {(1UL << GLF_BLOCKING),                 "b" })
> +        {(1UL << GLF_BLOCKING),                        "b" },          \
> +        {(1UL << GLF_INODE_DELETING),          "-" })
>  
>  #ifndef NUMPTY
>  #define NUMPTY
> 
> 
> --
> Andrew W. Elble
> aweits at discipline.rit.edu
> Infrastructure Engineer, Communications Technical Lead
> Rochester Institute of Technology
> PGP: BFAD 8461 4CCF DC95 DA2C B0EB 965B 082E 863E C912

Hi Andrew,

Actually, I've found a few bugs and problems with that last patch set
and revised my patches last week. I've also added the glock flag, but
used "x" rather than "-" because I'm not sure I like punctuation marks there,
but nothing else makes sense either. The other changes are for the other
thing you spotted (which I caught in testing). The proper way to do it
is to initialize the i_gl to ip->i_gl in the evict code, and not have the
if at all. That affects two of the patches:
"gfs2: Use new variable i_gl instead of ip->i_gl"
and:
"GFS2: Rework gfs2_evict_inode to prevent collisions with openers"

I've been holding off on sending a revised set to see if I got other
comments or other problems during testing, but since you found them,
I'll just send out a new patch set.

Regards,

Bob Peterson
Red Hat File Systems