From: Daniel Bristot de Oliveira <bristot@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Pavel Tatashin <pasha.tatashin@oracle.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
"Steven Rostedt (VMware)" <rostedt@goodmis.org>,
Zhou Chengming <zhouchengming1@huawei.com>,
Jiri Kosina <jkosina@suse.cz>,
Josh Poimboeuf <jpoimboe@redhat.com>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
Chris von Recklinghausen <crecklin@redhat.com>,
Jason Baron <jbaron@akamai.com>, Scott Wood <swood@redhat.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
Clark Williams <williams@redhat.com>,
x86@kernel.org
Subject: [PATCH V2 6/9] jump_label: Sort entries of the same key by the code
Date: Tue, 18 Dec 2018 17:46:35 +0100 [thread overview]
Message-ID: <2533644a5a394052b64a55eaebfb9d945dabbc83.1545149539.git.bristot@redhat.com> (raw)
In-Reply-To: <cover.1545149539.git.bristot@redhat.com>
In the batching mode, entries with the same key should also be sorted by the
code, enabling a bsearch() of a code/addr when updating a key.
Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com>
---
kernel/jump_label.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/kernel/jump_label.c b/kernel/jump_label.c
index 26bf54251218..22093b5f57c9 100644
--- a/kernel/jump_label.c
+++ b/kernel/jump_label.c
@@ -38,12 +38,28 @@ static int jump_label_cmp(const void *a, const void *b)
const struct jump_entry *jea = a;
const struct jump_entry *jeb = b;
+ /*
+ * Entrires are sorted by key.
+ */
if (jump_entry_key(jea) < jump_entry_key(jeb))
return -1;
if (jump_entry_key(jea) > jump_entry_key(jeb))
return 1;
+#ifdef HAVE_JUMP_LABEL_BATCH
+ /*
+ * In the batching mode, entries should also be sorted by the code
+ * inside the already sorted list of entries, enabling a bsearch in
+ * the vector.
+ */
+ if (jump_entry_code(jea) < jump_entry_code(jeb))
+ return -1;
+
+ if (jump_entry_code(jea) > jump_entry_code(jeb))
+ return 1;
+#endif
+
return 0;
}
--
2.17.1
next prev parent reply other threads:[~2018-12-18 16:47 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-18 16:46 [PATCH V2 0/9] x86/jump_label: Bound IPIs sent when updating a static key Daniel Bristot de Oliveira
2018-12-18 16:46 ` [PATCH V2 1/9] jump_label: Add for_each_label_entry helper Daniel Bristot de Oliveira
2018-12-18 21:19 ` Borislav Petkov
2018-12-19 7:38 ` Daniel Bristot de Oliveira
2018-12-19 10:37 ` Borislav Petkov
2018-12-18 16:46 ` [PATCH V2 2/9] jump_label: Add the jump_label_can_update_check() helper Daniel Bristot de Oliveira
2018-12-18 16:46 ` [PATCH V2 3/9] x86/jump_label: Move checking code away from __jump_label_transform() Daniel Bristot de Oliveira
2018-12-19 8:43 ` Jiri Kosina
2018-12-19 8:49 ` Thomas Gleixner
2018-12-19 10:14 ` Daniel Bristot de Oliveira
2018-12-18 16:46 ` [PATCH V2 4/9] x86/jump_label: Add __jump_label_set_jump_code() helper Daniel Bristot de Oliveira
2018-12-18 16:46 ` [PATCH V2 5/9] x86/alternative: Split text_poke_bp() into tree steps Daniel Bristot de Oliveira
2018-12-18 17:25 ` Steven Rostedt
2018-12-19 8:44 ` Jiri Kosina
2018-12-18 16:46 ` Daniel Bristot de Oliveira [this message]
2018-12-18 16:46 ` [PATCH V2 7/9] x86/alternative: Batch of patch operations Daniel Bristot de Oliveira
2018-12-18 17:31 ` Steven Rostedt
2018-12-18 19:27 ` Daniel Bristot de Oliveira
2018-12-18 16:46 ` [PATCH V2 8/9] x86/jump_label: Batch jump label updates Daniel Bristot de Oliveira
2018-12-18 16:46 ` [PATCH V2 9/9] jump_label: Batch up if arch supports it Daniel Bristot de Oliveira
2018-12-18 17:35 ` Steven Rostedt
2018-12-18 19:33 ` Daniel Bristot de Oliveira
2018-12-18 20:32 ` Steven Rostedt
2018-12-18 21:06 ` Daniel Bristot de Oliveira
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=2533644a5a394052b64a55eaebfb9d945dabbc83.1545149539.git.bristot@redhat.com \
--to=bristot@redhat.com \
--cc=bp@alien8.de \
--cc=crecklin@redhat.com \
--cc=gregkh@linuxfoundation.org \
--cc=hpa@zytor.com \
--cc=jbaron@akamai.com \
--cc=jkosina@suse.cz \
--cc=jpoimboe@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mhiramat@kernel.org \
--cc=mingo@redhat.com \
--cc=mtosatti@redhat.com \
--cc=pasha.tatashin@oracle.com \
--cc=peterz@infradead.org \
--cc=rostedt@goodmis.org \
--cc=swood@redhat.com \
--cc=tglx@linutronix.de \
--cc=williams@redhat.com \
--cc=x86@kernel.org \
--cc=zhouchengming1@huawei.com \
/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).