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pnfs/flexfiles: report layoutstat regularly

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As a simple scheme, report every minute if IO is still going on.

Reviewed-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Peng Tao
2015-06-23 19:52:04 +08:00
committed by Trond Myklebust
parent 1bfe3b259f
commit 97ba375b5d
2 changed files with 28 additions and 5 deletions
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27
fs/nfs/flexfilelayout/flexfilelayout.c
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@@ -452,14 +452,23 @@ nfs4_ff_layout_calc_completion_time(struct rpc_task *task)
return ktime_sub(ktime_get(), task->tk_start);
}
static void
static bool
nfs4_ff_layoutstat_start_io(struct nfs4_ff_layout_mirror *mirror,
struct nfs4_ff_layoutstat *layoutstat)
{
static const ktime_t notime = {0};
ktime_t now = ktime_get();
nfs4_ff_start_busy_timer(&layoutstat->busy_timer);
cmpxchg(&mirror->start_time, notime, ktime_get());
cmpxchg(&mirror->start_time.tv64, notime.tv64, now.tv64);
cmpxchg(&mirror->last_report_time.tv64, notime.tv64, now.tv64);
if (ktime_to_ms(ktime_sub(now, mirror->last_report_time)) >=
FF_LAYOUTSTATS_REPORT_INTERVAL) {
mirror->last_report_time = now;
return true;
}
return false;
}
static void
@@ -496,10 +505,15 @@ static void
nfs4_ff_layout_stat_io_start_read(struct nfs4_ff_layout_mirror *mirror,
__u64 requested)
{
bool report;
spin_lock(&mirror->lock);
nfs4_ff_layoutstat_start_io(mirror, &mirror->read_stat);
report = nfs4_ff_layoutstat_start_io(mirror, &mirror->read_stat);
nfs4_ff_layout_stat_io_update_requested(&mirror->read_stat, requested);
spin_unlock(&mirror->lock);
if (report)
pnfs_report_layoutstat(mirror->lseg->pls_layout->plh_inode);
}
static void
@@ -519,10 +533,15 @@ static void
nfs4_ff_layout_stat_io_start_write(struct nfs4_ff_layout_mirror *mirror,
__u64 requested)
{
bool report;
spin_lock(&mirror->lock);
nfs4_ff_layoutstat_start_io(mirror, &mirror->write_stat);
report = nfs4_ff_layoutstat_start_io(mirror , &mirror->write_stat);
nfs4_ff_layout_stat_io_update_requested(&mirror->write_stat, requested);
spin_unlock(&mirror->lock);
if (report)
pnfs_report_layoutstat(mirror->lseg->pls_layout->plh_inode);
}
static void