From: Li Wang <li.wang@linux.dev>
To: Cyril Hrubis <chrubis@suse.cz>
Cc: ltp@lists.linux.it
Subject: Re: [LTP] [PATCH] syscalls/madvise06: Fix sporadic not enough RAM TCONFs
Date: Wed, 27 May 2026 19:22:00 +0800 [thread overview]
Message-ID: <ahbT2MRuzwEo-RY2@linux.dev> (raw)
In-Reply-To: <20260527103756.448843-1-chrubis@suse.cz>
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
--
Mailing list info: https://lists.linux.it/listinfo/ltp
next prev parent reply other threads:[~2026-05-27 11:22 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-27 10:37 [LTP] [PATCH] syscalls/madvise06: Fix sporadic not enough RAM TCONFs Cyril Hrubis
2026-05-27 11:22 ` Li Wang [this message]
2026-05-27 11:29 ` Petr Vorel
2026-05-27 12:13 ` Cyril Hrubis
2026-05-27 12:17 ` Petr Vorel
2026-05-27 13:06 ` [LTP] " linuxtestproject.agent
2026-05-27 13:24 ` Cyril Hrubis
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