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Re: [PATCH] kill t_sema member of struct xfs_trans

To: Niv Sardi <xaiki@xxxxxxx>
Subject: Re: [PATCH] kill t_sema member of struct xfs_trans
From: Timothy Shimmin <tes@xxxxxxx>
Date: Wed, 27 Feb 2008 18:09:52 +1100
Cc: Christoph Hellwig <hch@xxxxxx>, xfs@xxxxxxxxxxx
In-reply-to: <20080227005546.GA77525841@xxxxxxx>
References: <20080207082724.GA14119@xxxxxx> <20080226175758.GA13162@xxxxxx> <20080227005546.GA77525841@xxxxxxx>
Sender: xfs-bounce@xxxxxxxxxxx
User-agent: Thunderbird 2.0.0.9 (Macintosh/20071031)
Niv Sardi wrote:
* Christoph Hellwig <hch@xxxxxx> [2008-02-26 18:57:58 +0100]:

Index: linux-2.6-xfs/fs/xfs/xfs_trans.h
===================================================================
--- linux-2.6-xfs.orig/fs/xfs/xfs_trans.h       2008-02-05 08:48:40.000000000 
+0100
+++ linux-2.6-xfs/fs/xfs/xfs_trans.h    2008-02-05 08:48:45.000000000 +0100
@@ -341,7 +341,6 @@ typedef struct xfs_trans {
        unsigned int            t_rtx_res;      /* # of rt extents resvd */
        unsigned int            t_rtx_res_used; /* # of resvd rt extents used */
        xfs_log_ticket_t        t_ticket;       /* log mgr ticket */
-       sema_t                  t_sema;         /* sema for commit completion */
        xfs_lsn_t               t_lsn;          /* log seq num of start of
                                                 * transaction. */
        xfs_lsn_t               t_commit_lsn;   /* log seq num of end of

On Thu, Feb 07, 2008 at 09:27:24AM +0100, Christoph Hellwig wrote:
It's completely unused so we might aswell kill it.  Note that there is
another t_sema in struct xlog_ticket, which is used and actually an sv_t
despite the name.  That one is left untouched by this patch.
Ping?

This seems to be already applied in our dev tree, I'm trying to track down 
how/when/by-who, appart from that I'm all for pushing it.

Cheers,

Niv, it still seems to be in our dev tree for me:

> p_cat -farm xfs_trans.h | grep -C 3 t_sema
doucette  |1.22 |                            |  unsigned int            
t_rtx_res;      /* # of rt extents resvd */
cattelan  |1.118|2.4.x-xfs:slinx:144573a     |  unsigned int            
t_rtx_res_used; /* # of resvd rt extents used */
ajs       |1.13 |                            |  xfs_log_ticket_t        
t_ticket;       /* log mgr ticket */
ajs       |1.11 |                            |  sema_t                  t_sema; 
        /* sema for commit completion */
lord      |1.114|2.4.x-xfs:slinx:129778a     |  xfs_lsn_t               t_lsn;  
        /* log seq num of start of
lord      |1.114|2.4.x-xfs:slinx:129778a     |                                  
         * transaction. */
cattelan  |1.118|2.4.x-xfs:slinx:144573a     |  xfs_lsn_t               
t_commit_lsn;   /* log seq num of end of

--Tim


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