The following commit has been merged into the core/rcu branch of tip: Commit-ID: 2e90de76f226f11fe26c871aa321be28152f565a Gitweb: https://git.kernel.org/tip/2e90de76f226f11fe26c871aa321be28152f565a Author: Paul E. McKenney <[email protected]> AuthorDate: Mon, 25 May 2020 17:45:03 -07:00 Committer: Paul E. McKenney <[email protected]> CommitterDate: Mon, 29 Jun 2020 12:00:44 -07:00
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) <[email protected]> Signed-off-by: Paul E. McKenney <[email protected]> --- kernel/rcu/refperf.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/kernel/rcu/refperf.c b/kernel/rcu/refperf.c index 75b9cce..fc940e3 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; }
