[LTP] [PATCH] syscalls/madvise06: Fix sporadic not enough RAM TCONFs

[Li Wang]

Cyril Hrubis wrote:

> On systems with <= 2GB RAM the test produced sporadic TCONFs. That is
> because even if the test setup does sync() and drops caches the system
> starts fauting in pages immediatelly after caches were dropped. It may
> easily happen that system may fault in a few hundred of MBs of memory
> betwen the write to drop_caches and the time sysinfo() syscall returns.
> 
> The correct fix is to use the MemAvailable metric from /proc/meminfo
> that includes both free memory and caches and is more realistic estimate
> of how much memory can be consumed by a test. We even have helper
> functions in the test library so we simply make use of them.
> 
> Signed-off-by: Cyril Hrubis <chrubis@suse.cz>

Sounds reasonable.

Reviewed-by: Li Wang <li.wang@linux.dev>

-- 
Regards,
Li Wang