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| author |   Paul E. McKenney <paulmck@kernel.org> | 2020-05-25 17:45:03 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2020-06-29 12:00:44 -0700 |
| commit | 2e90de76f226f11fe26c871aa321be28152f565a (patch) | |
| tree | f6c28440faa82b028a41e31db9681c6c81219a2e /kernel/rcu | |
| parent | refperf: Dynamically allocate experiment-summary output buffer (diff) | |
| download | linux-dev-2e90de76f226f11fe26c871aa321be28152f565a.tar.xz linux-dev-2e90de76f226f11fe26c871aa321be28152f565a.zip | |
refperf: Dynamically allocate thread-summary output buffer
Currently, the buffer used to accumulate the thread-summary output is
fixed size, which will cause problems if someone decides to run on a large
number of PCUs. This commit therefore dynamically allocates this buffer.
[ paulmck: Fix memory allocation as suggested by KASAN. ]
Cc: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/refperf.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/kernel/rcu/refperf.c b/kernel/rcu/refperf.c index 75b9cceaece1..fc940e3dba1f 100644 --- a/kernel/rcu/refperf.c +++ b/kernel/rcu/refperf.c @@ -301,9 +301,12 @@ u64 process_durations(int n) int i; struct reader_task *rt; char buf1[64]; - char buf[512]; + char *buf; u64 sum = 0; + buf = kmalloc(128 + nreaders * 32, GFP_KERNEL); + if (!buf) + return 0; buf[0] = 0; sprintf(buf, "Experiment #%d (Format: <THREAD-NUM>:<Total loop time in ns>)", exp_idx); @@ -322,6 +325,7 @@ u64 process_durations(int n) PERFOUT("%s\n", buf); + kfree(buf); return sum; } |