From: "Qiu, Michael" <michael.qiu@intel.com>
To: "Tan, Jianfeng" <jianfeng.tan@intel.com>, "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH v3] mem: calculate space left in a hugetlbfs
Date: Mon, 21 Dec 2015 08:34:05 +0000 [thread overview]
Message-ID: <533710CFB86FA344BFBF2D6802E6028622EFAF93@SHSMSX101.ccr.corp.intel.com> (raw)
In-Reply-To: <1447814537-133466-1-git-send-email-jianfeng.tan@intel.com>
On 2015/11/18 17:42, Jianfeng Tan wrote:
> Currently DPDK does not respect the quota of a hugetblfs mount.
> It will fail to init the EAL because it tries to map the number of
> free hugepages in the system rather than using the number specified
> in the quota for that mount.
>
> To solve this issue, we take the quota into consideration when
> calculating the number of hugepages to map. We use either the number
> specified in the quota, or number of available hugepages, whichever
> is lower.
>
> There are possible race conditions when multiple applications
> allocate hugepages in different hugetlbfs mounts of the same size,
> so the suggested system would have a pool with enough hugepages for
> all hugetlbfs mount quotas.
>
> There is, however, still an open issue with
> CONFIG_RTE_EAL_SINGLE_FILE_SEGMENTS. When this option is enabled
> (IVSHMEM target does this by default), having hugetlbfs mounts with
> quota will fail to remap hugepages because it relies on having
> mapped all free hugepages in the system.
>
> Signed-off-by: Jianfeng Tan <jianfeng.tan@intel.com>
>
Acked-by: Michael Qiu <michael.qiu@intel.com>
prev parent reply other threads:[~2015-12-21 8:34 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-12 0:17 [dpdk-dev] [PATCH] mem: fix how to " Jianfeng Tan
2015-11-12 2:10 ` [dpdk-dev] [PATCH v2] mem: " Jianfeng Tan
2015-11-12 13:14 ` Sergio Gonzalez Monroy
2015-11-12 7:48 ` [dpdk-dev] [PATCH] mem: fix how to " De Lara Guarch, Pablo
2015-11-12 1:57 ` [dpdk-dev] [PATCH v2] mem: " Jianfeng Tan
2015-11-12 17:38 ` [dpdk-dev] [PATCH] mem: fix how to " Stephen Hemminger
2015-11-12 17:49 ` Thomas Monjalon
2015-11-18 2:42 ` [dpdk-dev] [PATCH v3] mem: " Jianfeng Tan
2015-11-18 10:28 ` Sergio Gonzalez Monroy
2015-12-21 8:34 ` Qiu, Michael [this message]
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