From: Masayoshi Mizuma <m.mizuma@xxxxxxxxxxxxxx>
generic/551 sometimes fails because it's killed by OOM killer.
That is because aio-dio-write-verify, which is called by
generic/551, tries to allocate memory even though the total
allocation size exceeds the available memory.
aio-dio-write-verify allocates memory according to the 'size'
argument, and generic/551 passes the argument.
Stop adding the argument when the total size is exceeds
the available memory.
Signed-off-by: Masayoshi Mizuma <m.mizuma@xxxxxxxxxxxxxx>
---
common/rc | 11 +++++++++++
tests/generic/551 | 6 ++++++
2 files changed, 17 insertions(+)
diff --git a/common/rc b/common/rc
index b988e912..3494426e 100644
--- a/common/rc
+++ b/common/rc
@@ -910,6 +910,17 @@ _free_memory_bytes()
free -b | grep ^Mem | awk '{print $4}'
}
+_available_memory_bytes()
+{
+ nf=`free -b | grep ^Mem | awk '{print NF}'`
+ if [[ nf -lt 7 ]]; then
+ # Doesn't have available field. Fallback.
+ _free_memory_bytes
+ else
+ free -b | grep ^Mem | awk '{print $7}'
+ fi
+}
+
# Create fs of certain size on scratch device
# _scratch_mkfs_sized <size in bytes> [optional blocksize]
_scratch_mkfs_sized()
diff --git a/tests/generic/551 b/tests/generic/551
index a2a5b51d..a0dc9cd7 100755
--- a/tests/generic/551
+++ b/tests/generic/551
@@ -55,12 +55,18 @@ do_test()
local size
local off
local truncsize
+ local total_size=0
+ local avail_mem=`_available_memory_bytes`
# the number of AIO write operation
num_oper=$((RANDOM % 64 + 1))
for ((i=0; i<num_oper; i++)); do
size=$(((RANDOM % max_io_size_b + 1) * diosize))
+ total_size=$((total_size + size*2))
+ if [[ $total_size -ge $avail_mem ]]; then
+ break
+ fi
off=$((RANDOM % max_io_size_b * diosize))
oper_list="$oper_list -a size=$size,off=$off"
done
--
2.18.1
