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authorSteven Whitehouse <swhiteho@redhat.com>2012-08-23 15:37:59 +0100
committerSteven Whitehouse <swhiteho@redhat.com>2012-09-24 10:47:20 +0100
commit9e733d3923fb0e4eeae7b827019332d246576a22 (patch)
tree37fc39212545c6bc3c2de8f0293cb9952802f1e8 /fs/gfs2/trace_gfs2.h
parent137834a696fd51ef8c710a0ad854b585027c7df0 (diff)
downloadlinux-9e733d3923fb0e4eeae7b827019332d246576a22.tar.bz2
GFS2: Improve block reservation tracing
This patch improves the tracing of block reservations by removing some corner cases and also providing more useful detail in the traces. A new field is added to the reservation structure to contain the inode number. This is used since in certain contexts it is not possible to access the inode itself to obtain this information. As a result we can then display the inode number for all tracepoints and also in case we dump the resource group. The "del" tracepoint operation has been removed. This could be called with the reservation rgrp set to NULL. That resulted in not printing the device number, and thus making the information largely useless anyway. Also, the conditional on the rgrp being NULL can then be removed from the tracepoint. After this change, all the block reservation tracepoint calls will be called with the rgrp information. The existing ins,clm and tdel calls to the block reservation tracepoint are sufficient to track the entire life of the block reservation. In gfs2_block_alloc() the error detection is updated to print out the inode number of the problematic inode. This can then be compared against the information in the glock dump,tracepoints, etc. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/trace_gfs2.h')
-rw-r--r--fs/gfs2/trace_gfs2.h18
1 files changed, 8 insertions, 10 deletions
diff --git a/fs/gfs2/trace_gfs2.h b/fs/gfs2/trace_gfs2.h
index b947aa4dfca4..bbdc78af60ca 100644
--- a/fs/gfs2/trace_gfs2.h
+++ b/fs/gfs2/trace_gfs2.h
@@ -509,10 +509,9 @@ TRACE_EVENT(gfs2_block_alloc,
/* Keep track of multi-block reservations as they are allocated/freed */
TRACE_EVENT(gfs2_rs,
- TP_PROTO(const struct gfs2_inode *ip, const struct gfs2_blkreserv *rs,
- u8 func),
+ TP_PROTO(const struct gfs2_blkreserv *rs, u8 func),
- TP_ARGS(ip, rs, func),
+ TP_ARGS(rs, func),
TP_STRUCT__entry(
__field( dev_t, dev )
@@ -526,18 +525,17 @@ TRACE_EVENT(gfs2_rs,
),
TP_fast_assign(
- __entry->dev = rs->rs_rbm.rgd ? rs->rs_rbm.rgd->rd_sbd->sd_vfs->s_dev : 0;
- __entry->rd_addr = rs->rs_rbm.rgd ? rs->rs_rbm.rgd->rd_addr : 0;
- __entry->rd_free_clone = rs->rs_rbm.rgd ? rs->rs_rbm.rgd->rd_free_clone : 0;
- __entry->rd_reserved = rs->rs_rbm.rgd ? rs->rs_rbm.rgd->rd_reserved : 0;
- __entry->inum = ip ? ip->i_no_addr : 0;
+ __entry->dev = rs->rs_rbm.rgd->rd_sbd->sd_vfs->s_dev;
+ __entry->rd_addr = rs->rs_rbm.rgd->rd_addr;
+ __entry->rd_free_clone = rs->rs_rbm.rgd->rd_free_clone;
+ __entry->rd_reserved = rs->rs_rbm.rgd->rd_reserved;
+ __entry->inum = rs->rs_inum;
__entry->start = gfs2_rbm_to_block(&rs->rs_rbm);
__entry->free = rs->rs_free;
__entry->func = func;
),
- TP_printk("%u,%u bmap %llu resrv %llu rg:%llu rf:%lu rr:%lu %s "
- "f:%lu",
+ TP_printk("%u,%u bmap %llu resrv %llu rg:%llu rf:%lu rr:%lu %s f:%lu",
MAJOR(__entry->dev), MINOR(__entry->dev),
(unsigned long long)__entry->inum,
(unsigned long long)__entry->start,