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bcachefs: Add a tracepoint for superblock writes

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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2022-04-03 15:13:20 -04:00 committed by Kent Overstreet
parent c6b6d41612
commit 4254f5bf6e
2 changed files with 23 additions and 0 deletions
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3
fs/bcachefs/super-io.c
View File

@ -16,6 +16,7 @@
#include "quota.h" #include "quota.h"
#include "super-io.h" #include "super-io.h"
#include "super.h" #include "super.h"
#include "trace.h"
#include "vstructs.h" #include "vstructs.h"
#include <linux/backing-dev.h> #include <linux/backing-dev.h>
@ -799,6 +800,8 @@ int bch2_write_super(struct bch_fs *c)
unsigned degraded_flags = BCH_FORCE_IF_DEGRADED; unsigned degraded_flags = BCH_FORCE_IF_DEGRADED;
int ret = 0; int ret = 0;
trace_write_super(c, _RET_IP_);
if (c->opts.very_degraded) if (c->opts.very_degraded)
degraded_flags |= BCH_FORCE_IF_LOST; degraded_flags |= BCH_FORCE_IF_LOST;

20
fs/bcachefs/trace.h
View File

@ -82,6 +82,26 @@ DECLARE_EVENT_CLASS(bio,
(unsigned long long)__entry->sector, __entry->nr_sector) (unsigned long long)__entry->sector, __entry->nr_sector)
); );
/* super-io.c: */
TRACE_EVENT(write_super,
TP_PROTO(struct bch_fs *c, unsigned long ip),
TP_ARGS(c, ip),
TP_STRUCT__entry(
__field(dev_t, dev )
__field(unsigned long, ip )
),
TP_fast_assign(
__entry->dev = c->dev;
__entry->ip = ip;
),
TP_printk("%d,%d for %pS",
MAJOR(__entry->dev), MINOR(__entry->dev),
(void *) __entry->ip)
);
/* io.c: */ /* io.c: */
DEFINE_EVENT(bio, read_split, DEFINE_EVENT(bio, read_split,