linux/tools
Zijian Zhang af2b7e5b74 selftests: fix OOM in msg_zerocopy selftest
In selftests/net/msg_zerocopy.c, it has a while loop keeps calling sendmsg
on a socket with MSG_ZEROCOPY flag, and it will recv the notifications
until the socket is not writable. Typically, it will start the receiving
process after around 30+ sendmsgs. However, as the introduction of commit
dfa2f04833 ("tcp: get rid of sysctl_tcp_adv_win_scale"), the sender is
always writable and does not get any chance to run recv notifications.
The selftest always exits with OUT_OF_MEMORY because the memory used by
opt_skb exceeds the net.core.optmem_max. Meanwhile, it could be set to a
different value to trigger OOM on older kernels too.

Thus, we introduce "cfg_notification_limit" to force sender to receive
notifications after some number of sendmsgs.

Fixes: 07b65c5b31 ("test: add msg_zerocopy test")
Signed-off-by: Zijian Zhang <zijianzhang@bytedance.com>
Signed-off-by: Xiaochun Lu <xiaochun.lu@bytedance.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20240701225349.3395580-2-zijianzhang@bytedance.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-07-03 19:42:32 -07:00
..
accounting
arch tools headers arm64: Sync arm64's cputype.h with the kernel sources 2024-06-04 16:46:40 -03:00
bootconfig
bpf bpf: Fix potential integer overflow in resolve_btfids 2024-05-24 17:12:12 +02:00
build
certs
cgroup proc: rewrite stable_page_flags() 2024-04-25 20:56:15 -07:00
counter
crypto
debugging
firewire
firmware
gpio
hv tools: hv: suppress the invalid warning for packed member alignment 2024-05-28 05:27:35 +00:00
iio
include perf tools fixes for v6.10: 2nd batch 2024-06-09 09:04:51 -07:00
kvm/kvm_stat
laptop
leds
lib libbpf: don't close(-1) in multi-uprobe feature detector 2024-05-31 14:56:51 -07:00
memory-model
mm
net/ynl ynl: ensure exact-len value is resolved 2024-05-13 14:59:24 -07:00
objtool
pci
pcmcia
perf perf bpf: Fix handling of minimal vmlinux.h file when interrupting the build 2024-06-05 11:33:00 -03:00
power tools/power/cpupower: Fix Pstate frequency reporting on AMD Family 1Ah CPUs 2024-05-28 09:22:57 -06:00
rcu
scripts
sound ASoC: dapm-graph: new tool to visualize DAPM state 2024-04-21 09:58:17 +09:00
spi
testing selftests: fix OOM in msg_zerocopy selftest 2024-07-03 19:42:32 -07:00
thermal
time
tracing tools/latency-collector: Fix -Wformat-security compile warns 2024-05-23 10:46:01 -04:00
usb
verification
virtio
wmi
workqueue
writeback writeback: add wb_monitor.py script to monitor writeback info on bdi 2024-05-05 17:53:51 -07:00
Makefile