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From: Stephen Hemminger <stephen@networkplumber.org>
To: Don Wallwork <donw@xsightlabs.com>
Cc: "Morten Brørup" <mb@smartsharesystems.com>,
	"Anatoly Burakov" <anatoly.burakov@intel.com>,
	"Dmitry Kozlyuk" <dmitry.kozliuk@gmail.com>,
	"Bruce Richardson" <bruce.richardson@intel.com>,
	dev@dpdk.org
Subject: Re: [RFC] eal: allow worker lcore stacks to be allocated from hugepage memory
Date: Fri, 29 Apr 2022 12:03:26 -0700	[thread overview]
Message-ID: <20220429120326.4c56227c@hermes.local> (raw)
In-Reply-To: <f21b5915-d9c4-d7b9-9563-20adf096acbd@xsightlabs.com>

On Fri, 29 Apr 2022 14:52:03 -0400
Don Wallwork <donw@xsightlabs.com> wrote:

> >>>>
> >>>> The expectation is that use of this optional feature would be limited to cases where the performance gains justify the implications of these tradeoffs. For example, a specific data plane application may be okay with limited stack size and could be tested to ensure stack usage remains within limits.  
> > How to identify the required stack size and verify it... If aiming for small stacks, some instrumentation would be nice, like rte_mempool_audit() and rte_mempool_list_dump().  
> Theoretically, a region of memory following the stack could be populated 
> with a poison pattern that could be audited.   Not as robust as hw 
> mprotect/MMU, but it could provide some protection.
> >

Usually just doing mmap(.., PROT_NONE) will create a page that will cause SEGV on access
which is what  you want.

  reply	other threads:[~2022-04-29 19:03 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-26 12:19 Don Wallwork
2022-04-26 14:58 ` Stephen Hemminger
2022-04-26 21:01   ` Don Wallwork
2022-04-26 21:21     ` Stephen Hemminger
2022-04-26 21:25       ` Don Wallwork
2022-04-27  8:17         ` Morten Brørup
2022-04-29 18:52           ` Don Wallwork
2022-04-29 19:03             ` Stephen Hemminger [this message]
2022-05-02 13:15               ` Don Wallwork
2022-04-30  7:55             ` Morten Brørup
2022-04-27  0:42 ` Honnappa Nagarahalli
2022-04-27 17:50   ` Don Wallwork
2022-04-27 19:09     ` Honnappa Nagarahalli
2022-04-29 20:00 ` [RFC v2] " Don Wallwork
2022-04-30  7:20   ` Morten Brørup

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