lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-Id: <20230116062347.1148553-1-huaisheng.ye@intel.com>
Date:   Mon, 16 Jan 2023 14:23:47 +0800
From:   Huaisheng Ye <huaisheng.ye@...el.com>
To:     sj@...nel.org
Cc:     akpm@...ux-foundation.org, damon@...ts.linux.dev,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Huaisheng Ye <huaisheng.ye@...el.com>
Subject: [PATCH] mm/damon/core: skip apply schemes if empty

Sometimes there is no scheme in damon's context, for example
just use damo record to monitor workload's data access pattern.

If current damon context doesn't have any scheme in the list,
kdamond has no need to iterate over list of all targets and regions
but do nothing.

So, skip apply schemes when ctx->schemes is empty.

Signed-off-by: Huaisheng Ye <huaisheng.ye@...el.com>
---
 mm/damon/core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/damon/core.c b/mm/damon/core.c
index ceec75b88ef9..f338691e4591 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -1230,7 +1230,8 @@ static int kdamond_fn(void *data)
 			if (ctx->callback.after_aggregation &&
 					ctx->callback.after_aggregation(ctx))
 				break;
-			kdamond_apply_schemes(ctx);
+			if (!list_empty(&ctx->schemes))
+				kdamond_apply_schemes(ctx);
 			kdamond_reset_aggregated(ctx);
 			kdamond_split_regions(ctx);
 			if (ctx->ops.reset_aggregated)
-- 
2.31.1

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ