From 7f4811bb36d31059dfca4effb8fe2acff2180864 Mon Sep 17 00:00:00 2001 From: Ricardo Nabinger Sanchez Date: Mon, 9 Oct 2017 20:57:27 -0300 Subject: [PATCH] Add note for increasing shmmax if necessary When launching a large job, fio can attempt to grab more shared memory than allowed by the kernel. Hint the user about increasing such limit on Linux systems. Signed-off-by: Ricardo Nabinger Sanchez --- fio.1 | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fio.1 b/fio.1 index 68ed3ba4..6e7d1f8b 100644 --- a/fio.1 +++ b/fio.1 @@ -113,6 +113,8 @@ All fio parser warnings are fatal, causing fio to exit with an error. .TP .BI \-\-max\-jobs \fR=\fPnr Set the maximum number of threads/processes to support to \fInr\fR. +NOTE: On Linux, it may be necessary to increase the shared-memory limit +(`/proc/sys/kernel/shmmax') if fio runs into errors while creating jobs. .TP .BI \-\-server \fR=\fPargs Start a backend server, with \fIargs\fR specifying what to listen to. -- 2.25.1