From: David Marchand <david.marchand@redhat.com>
To: Steven Lariau <steven.lariau@arm.com>, Gage Eads <gage.eads@intel.com>
Cc: Olivier Matz <olivier.matz@6wind.com>, dev <dev@dpdk.org>,
nd <nd@arm.com>
Subject: Re: [dpdk-dev] [PATCH v2 1/5] lib/stack: fix inconsistent weak / strong cas
Date: Mon, 28 Sep 2020 12:22:34 +0200 [thread overview]
Message-ID: <CAJFAV8wi56h-fBDwDEc-2tJ3B8CTkQh8GmpBadDW4UD7P=-VLg@mail.gmail.com> (raw)
In-Reply-To: <20200925174340.10014-2-steven.lariau@arm.com>
On Fri, Sep 25, 2020 at 7:44 PM Steven Lariau <steven.lariau@arm.com> wrote:
>
> Fix cmpexchange usage of weak / strong.
> The generated code is the same on x86 and ARM (there is no weak
> cmpexchange), but the old usage was inconsistent.
> For push and pop update size, weak is used because cmpexchange is inside
> a loop.
> For pop update root, strong is used even though cmpexchange is inside a
> loop, because there may be a lot of operations to do in a loop iteration
> (locate the new head).
Is this patch backport material?
Thanks.
--
David Marchand
next prev parent reply other threads:[~2020-09-28 10:22 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-11 15:29 [dpdk-dev] [PATCH 0/5] lib/stack: improve lockfree C11 implementation Steven Lariau
2020-09-11 15:29 ` [dpdk-dev] [PATCH 1/5] lib/stack: fix inconsistent weak / strong cas Steven Lariau
2020-09-21 17:16 ` Eads, Gage
2020-09-11 15:29 ` [dpdk-dev] [PATCH 2/5] lib/stack: remove push acquire fence Steven Lariau
2020-09-21 17:16 ` Eads, Gage
2020-09-11 15:29 ` [dpdk-dev] [PATCH 3/5] lib/stack: remove redundant orderings for list->len Steven Lariau
2020-09-21 17:16 ` Eads, Gage
2020-09-11 15:29 ` [dpdk-dev] [PATCH 4/5] lib/stack: reload head when pop fails Steven Lariau
2020-09-21 17:16 ` Eads, Gage
2020-09-11 15:29 ` [dpdk-dev] [PATCH 5/5] lib/stack: remove pop cas release ordering Steven Lariau
2020-09-21 17:17 ` Eads, Gage
2020-09-25 14:27 ` David Marchand
2020-09-25 17:43 ` [dpdk-dev] [PATCH v2 0/5] lib/stack: improve lockfree C11 implementation Steven Lariau
2020-09-25 17:43 ` [dpdk-dev] [PATCH v2 1/5] lib/stack: fix inconsistent weak / strong cas Steven Lariau
2020-09-28 10:22 ` David Marchand [this message]
2020-09-28 15:58 ` Eads, Gage
2020-09-25 17:43 ` [dpdk-dev] [PATCH v2 2/5] lib/stack: remove push acquire fence Steven Lariau
2020-09-25 17:43 ` [dpdk-dev] [PATCH v2 3/5] lib/stack: remove redundant orderings for list->len Steven Lariau
2020-09-25 17:43 ` [dpdk-dev] [PATCH v2 4/5] lib/stack: reload head when pop fails Steven Lariau
2020-09-25 17:43 ` [dpdk-dev] [PATCH v2 5/5] lib/stack: remove pop cas release ordering Steven Lariau
2020-09-25 17:57 ` Eads, Gage
2020-09-30 19:14 ` [dpdk-dev] [PATCH v2 0/5] lib/stack: improve lockfree C11 implementation David Marchand
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