From: Marcelo Tosatti <mtosatti@redhat.com>
To: Christoph Lameter <cl@linux.com>
Cc: Aaron Tomlin <atomlin@atomlin.com>,
Frederic Weisbecker <frederic@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Marcelo Tosatti <mtosatti@redhat.com>
Subject: [PATCH v2 03/11] this_cpu_cmpxchg: loongarch: switch this_cpu_cmpxchg to locked, add _local function
Date: Thu, 09 Feb 2023 12:01:53 -0300 [thread overview]
Message-ID: <20230209153204.711672794@redhat.com> (raw)
In-Reply-To: 20230209150150.380060673@redhat.com
Goal is to have vmstat_shepherd to transfer from
per-CPU counters to global counters remotely. For this,
an atomic this_cpu_cmpxchg is necessary.
Following the kernel convention for cmpxchg/cmpxchg_local,
add this_cpu_cmpxchg_local helpers to Loongarch.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Index: linux-vmstat-remote/arch/loongarch/include/asm/percpu.h
===================================================================
--- linux-vmstat-remote.orig/arch/loongarch/include/asm/percpu.h
+++ linux-vmstat-remote/arch/loongarch/include/asm/percpu.h
@@ -150,6 +150,16 @@ static inline unsigned long __percpu_xch
}
/* this_cpu_cmpxchg */
+#define _protect_cmpxchg(pcp, o, n) \
+({ \
+ typeof(*raw_cpu_ptr(&(pcp))) __ret; \
+ preempt_disable_notrace(); \
+ __ret = cmpxchg(raw_cpu_ptr(&(pcp)), o, n); \
+ preempt_enable_notrace(); \
+ __ret; \
+})
+
+/* this_cpu_cmpxchg_local */
#define _protect_cmpxchg_local(pcp, o, n) \
({ \
typeof(*raw_cpu_ptr(&(pcp))) __ret; \
@@ -222,10 +232,15 @@ do { \
#define this_cpu_xchg_4(pcp, val) _percpu_xchg(pcp, val)
#define this_cpu_xchg_8(pcp, val) _percpu_xchg(pcp, val)
-#define this_cpu_cmpxchg_1(ptr, o, n) _protect_cmpxchg_local(ptr, o, n)
-#define this_cpu_cmpxchg_2(ptr, o, n) _protect_cmpxchg_local(ptr, o, n)
-#define this_cpu_cmpxchg_4(ptr, o, n) _protect_cmpxchg_local(ptr, o, n)
-#define this_cpu_cmpxchg_8(ptr, o, n) _protect_cmpxchg_local(ptr, o, n)
+#define this_cpu_cmpxchg_local_1(ptr, o, n) _protect_cmpxchg_local(ptr, o, n)
+#define this_cpu_cmpxchg_local_2(ptr, o, n) _protect_cmpxchg_local(ptr, o, n)
+#define this_cpu_cmpxchg_local_4(ptr, o, n) _protect_cmpxchg_local(ptr, o, n)
+#define this_cpu_cmpxchg_local_8(ptr, o, n) _protect_cmpxchg_local(ptr, o, n)
+
+#define this_cpu_cmpxchg_1(ptr, o, n) _protect_cmpxchg(ptr, o, n)
+#define this_cpu_cmpxchg_2(ptr, o, n) _protect_cmpxchg(ptr, o, n)
+#define this_cpu_cmpxchg_4(ptr, o, n) _protect_cmpxchg(ptr, o, n)
+#define this_cpu_cmpxchg_8(ptr, o, n) _protect_cmpxchg(ptr, o, n)
#include <asm-generic/percpu.h>
next prev parent reply other threads:[~2023-02-09 15:33 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-09 15:01 [PATCH v2 00/11] fold per-CPU vmstats remotely Marcelo Tosatti
2023-02-09 15:01 ` [PATCH v2 01/11] mm/vmstat: remove remote node draining Marcelo Tosatti
2023-02-28 15:53 ` David Hildenbrand
2023-02-28 19:36 ` Marcelo Tosatti
2023-03-02 10:10 ` David Hildenbrand
2023-03-21 15:20 ` Mel Gorman
2023-03-21 17:31 ` Marcelo Tosatti
2023-03-02 17:21 ` Peter Xu
2023-03-02 17:27 ` Peter Xu
2023-03-02 19:17 ` Marcelo Tosatti
2023-03-02 18:56 ` Marcelo Tosatti
2023-02-09 15:01 ` [PATCH v2 02/11] this_cpu_cmpxchg: ARM64: switch this_cpu_cmpxchg to locked, add _local function Marcelo Tosatti
2023-03-02 10:42 ` David Hildenbrand
2023-03-02 10:51 ` David Hildenbrand
2023-03-02 14:32 ` Marcelo Tosatti
2023-03-02 20:53 ` Peter Xu
2023-03-02 21:04 ` Marcelo Tosatti
2023-03-02 21:25 ` Peter Xu
2023-03-03 15:39 ` Marcelo Tosatti
2023-03-03 15:47 ` Marcelo Tosatti
2023-03-15 23:56 ` Christoph Lameter
2023-03-16 10:54 ` Marcelo Tosatti
2023-02-09 15:01 ` Marcelo Tosatti [this message]
2023-02-09 15:01 ` [PATCH v2 04/11] this_cpu_cmpxchg: S390: " Marcelo Tosatti
2023-02-09 15:01 ` [PATCH v2 05/11] this_cpu_cmpxchg: x86: " Marcelo Tosatti
2023-02-09 15:01 ` [PATCH v2 06/11] this_cpu_cmpxchg: asm-generic: " Marcelo Tosatti
2023-02-09 15:01 ` [PATCH v2 07/11] convert this_cpu_cmpxchg users to this_cpu_cmpxchg_local Marcelo Tosatti
2023-03-02 20:54 ` Peter Xu
2023-02-09 15:01 ` [PATCH v2 08/11] mm/vmstat: switch counter modification to cmpxchg Marcelo Tosatti
2023-03-02 10:47 ` David Hildenbrand
2023-03-02 14:47 ` Marcelo Tosatti
2023-03-02 16:20 ` Peter Xu
2023-03-02 19:11 ` Marcelo Tosatti
2023-03-02 20:06 ` Peter Xu
2023-02-09 15:01 ` [PATCH v2 09/11] mm/vmstat: use cmpxchg loop in cpu_vm_stats_fold Marcelo Tosatti
2023-03-01 22:57 ` Peter Xu
2023-03-02 13:55 ` Marcelo Tosatti
2023-03-02 21:19 ` Peter Xu
2023-03-03 15:17 ` Marcelo Tosatti
2023-02-09 15:02 ` [PATCH v2 10/11] mm/vmstat: switch vmstat shepherd to flush per-CPU counters remotely Marcelo Tosatti
2023-03-02 21:01 ` Peter Xu
2023-03-02 21:16 ` Marcelo Tosatti
2023-03-02 21:30 ` Peter Xu
2023-02-09 15:02 ` [PATCH v2 11/11] mm/vmstat: refresh stats remotely instead of via work item Marcelo Tosatti
2023-02-23 14:54 ` [PATCH v2 00/11] fold per-CPU vmstats remotely Marcelo Tosatti
2023-02-24 2:34 ` Hillf Danton
2023-02-27 19:41 ` Marcelo Tosatti
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20230209153204.711672794@redhat.com \
--to=mtosatti@redhat.com \
--cc=akpm@linux-foundation.org \
--cc=atomlin@atomlin.com \
--cc=cl@linux.com \
--cc=frederic@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).