From: Michal Hocko <mhocko@kernel.org>
To: Alex Richman <alex.r@gblabs.co.uk>
Cc: linux-man@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: mlock() confusing 1 half of system RAM limit
Date: Fri, 1 Jun 2018 15:41:54 +0200 [thread overview]
Message-ID: <20180601134154.GD15278@dhcp22.suse.cz> (raw)
In-Reply-To: <1ae5c450-1ffe-cf15-e878-b40f30c0acc3@gblabs.co.uk>
On Fri 01-06-18 14:24:23, Alex Richman wrote:
> Ah, that's it. Increased the limit on the mount and it works fine now.
Well, it is hidden very well. It is not until the page fault time (or
get_user_pages aka __mm_populate) when the operation fails and remasks
ENOSPC -> VM_FAULT_SIGBUS -> EFAULT -> ENOMEM on the way.
--
Michal Hocko
SUSE Labs
prev parent reply other threads:[~2018-06-01 13:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-01 9:53 mlock() confusing 1 half of system RAM limit Alex Richman
2018-06-01 11:44 ` Michal Hocko
2018-06-01 12:26 ` Alex Richman
2018-06-01 13:05 ` Michal Hocko
2018-06-01 13:24 ` Alex Richman
2018-06-01 13:41 ` Michal Hocko [this message]
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