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From: Thomas Monjalon <thomas@monjalon.net>
To: Gagandeep Singh <g.singh@nxp.com>
Cc: stable@dpdk.org, David Marchand <david.marchand@redhat.com>,
	dev <dev@dpdk.org>,
	"Burakov, Anatoly" <anatoly.burakov@intel.com>,
	Olivier Matz <olivier.matz@6wind.com>,
	Andrew Rybchenko <arybchenko@solarflare.com>,
	Nipun Gupta <nipun.gupta@nxp.com>
Subject: Re: [dpdk-dev] [dpdk-stable] [PATCH v2] eal: change max hugepage sizes to 4 for ARM platforms
Date: Thu, 08 Aug 2019 17:26:20 +0200
Message-ID: <1653519.Tj3hMS7AGf@xps> (raw)
In-Reply-To: <CAJFAV8xfXQxDOPptT7yjyZbo5y_A_Zbwt1onMXBKPU9vDhm4iQ@mail.gmail.com>

08/08/2019 14:37, David Marchand:
> On Thu, Aug 8, 2019 at 2:27 PM Gagandeep Singh <g.singh@nxp.com> wrote:
> >
> > ARM is supporting maximum 4 hugepage sizes (64K, 2M, 32M
> > and 1G) when granule is 4KB since very long and DPDK
> > support maximum 3 hugepage sizes.
> >
> > With all 4 hugepage sizes enabled, applications and some
> > stacks like VPP which are working over DPDK and using
> > "in-memory" eal option, or using separate mount points
> > on ARM based platform, fails at huge page initialization,
> > reporting error messages from eal:
> >
> > EAL: FATAL: Cannot get hugepage information.
> > EAL: Cannot get hugepage information.
> > EAL: Error - exiting with code: 1
> >
> > This issue is visible on kernel 5.2 (stable rel), where
> > kernel is by default creating directories for each supported
> > hugepage size in /sys/kernel/mm/hugepages/
> 
> Yes, any supported hugepage size is announced in sysfs.
> 
> > On earlier Stable Kernel LTR's, the directories visible in
> > /sys/kernel/mm/hugepages/ were dependent upon what hugepage
> > sizes are configured at boot time.
> 
> The change is in kernel 5.0 with:
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a21b0b78
> 
> where all supported sizes are now registered.
> 
> >
> > This change increases the maximum supported mount points
> > to 4 for ARM based platforms.
> >
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Gagandeep Singh <g.singh@nxp.com>
> > Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>

Applied with small updates in commit log (especially commit origin in 5.0), thanks.




      reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-07 10:12 [dpdk-dev] [PATCH] eal: change max hugepage sizes to 4 Gagandeep Singh
2019-08-07 12:00 ` David Marchand
2019-08-07 12:07   ` Thomas Monjalon
2019-08-07 13:28     ` Hemant Agrawal
2019-08-08  7:31       ` Thomas Monjalon
2019-08-12  9:43         ` Burakov, Anatoly
2019-08-12  9:49           ` David Marchand
2019-08-12 10:01             ` Thomas Monjalon
2019-08-12 10:38             ` Burakov, Anatoly
2019-08-08  7:33       ` David Marchand
2019-08-08  9:00         ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2019-08-08 10:37         ` [dpdk-dev] " Hemant Agrawal
2019-08-08 12:29           ` Steve Capper
2019-08-08 12:39             ` David Marchand
2019-08-12  9:42       ` Burakov, Anatoly
2019-08-07 15:27 ` Stephen Hemminger
2019-08-08 12:13 ` [dpdk-dev] [PATCH v2] eal: change max hugepage sizes to 4 for ARM platforms Gagandeep Singh
2019-08-08 12:37   ` [dpdk-dev] [dpdk-stable] " David Marchand
2019-08-08 15:26     ` Thomas Monjalon [this message]

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