On 30/06/2021 16:57, Paolo Pisati wrote: > While the offline memory test obey ratio limit, the same test with error > injection does not and tries to offline all the hotpluggable memory, spamming > system logs with hundreds of thousands of dump_page() entries, slowing system > down (to the point the test itself timeout and gets terminated) and excessive fs > occupation: > > ... > [ 9784.393354] page:c00c0000007d1b40 refcount:3 mapcount:0 mapping:c0000001fc03e950 index:0xe7b > [ 9784.393355] def_blk_aops > [ 9784.393356] flags: 0x3ffff800002062(referenced|active|workingset|private) > [ 9784.393358] raw: 003ffff800002062 c0000001b9343a68 c0000001b9343a68 c0000001fc03e950 > [ 9784.393359] raw: 0000000000000e7b c000000006607b18 00000003ffffffff c00000000490d000 > [ 9784.393359] page dumped because: migration failure > [ 9784.393360] page->mem_cgroup:c00000000490d000 > [ 9784.393416] migrating pfn 1f46d failed ret:1 > ... > > $ grep "page dumped because: migration failure" /var/log/kern.log | wc -l > 2405558 > > $ ls -la /var/log/kern.log > -rw-r----- 1 syslog adm 2256109539 Jun 30 14:19 /var/log/kern.log Makes sense to me and looks better choice than to disable the test completely (as other choice...). Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx> > > Signed-off-by: Paolo Pisati <paolo.pisati@xxxxxxxxxxxxx> > --- > tools/testing/selftests/memory-hotplug/mem-on-off-test.sh | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > Best regards, Krzysztof
