From: Miroslav Benes <mbenes@suse.cz>
To: zhang warden <zhangwarden@gmail.com>
Cc: Petr Mladek <pmladek@suse.com>,
Josh Poimboeuf <jpoimboe@kernel.org>,
Jiri Kosina <jikos@kernel.org>,
Joe Lawrence <joe.lawrence@redhat.com>,
live-patching@vger.kernel.org,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] livepatch: introduce klp_func called interface
Date: Fri, 31 May 2024 16:06:46 +0200 (CEST) [thread overview]
Message-ID: <alpine.LSU.2.21.2405311603260.8344@pobox.suse.cz> (raw)
In-Reply-To: <FF8C167F-1B6C-4E7D-81A0-CB34E082ACA5@gmail.com>
[-- Attachment #1: Type: text/plain, Size: 478 bytes --]
> And for the unlikely branch, isn’t the complier will compile this branch
> into a cold branch that will do no harm to the function performance?
The test (cmp insn or something like that) still needs to be there. Since
there is only a simple assignment in the branch, the compiler may just
choose not to have a cold branch in this case. The only difference is in
which case you would jump here. You can see for yourself (and prove me
wrong if it comes to it).
Miroslav
next prev parent reply other threads:[~2024-05-31 14:06 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-20 0:58 Wardenjohn
2024-05-20 6:46 ` Miroslav Benes
2024-05-20 7:10 ` zhang warden
2024-05-21 6:34 ` Miroslav Benes
2024-05-21 8:04 ` Petr Mladek
2024-05-24 8:09 ` zhang warden
2024-05-31 2:16 ` zhang warden
2024-05-31 7:21 ` Miroslav Benes
2024-05-31 13:19 ` zhang warden
2024-05-31 14:06 ` Miroslav Benes [this message]
2024-06-04 8:17 ` zhang warden
2024-06-05 5:04 ` Song Liu
2024-06-07 9:07 ` Miroslav Benes
2024-06-07 16:59 ` Song Liu
2024-06-11 2:23 ` zhang warden
2024-06-20 3:39 ` zhang warden
2024-06-20 9:31 ` Miroslav Benes
2024-05-31 19:16 ` Joe Lawrence
2024-06-04 8:14 ` zhang warden
2024-06-04 11:01 ` zhang warden
2024-06-04 14:37 ` Joe Lawrence
2024-06-05 2:38 ` zhang warden
2024-06-06 15:01 ` Joe Lawrence
2024-06-07 2:26 ` zhang warden
2024-05-20 8:00 ` Markus Elfring
2024-05-20 9:34 ` zhang warden
-- strict thread matches above, loose matches on Subject: below --
2024-05-19 7:43 Wardenjohn
2024-05-19 18:05 ` Markus Elfring
2024-05-19 23:42 ` zhang warden
2024-05-23 14:22 ` Dan Carpenter
2024-05-24 8:12 ` zhang warden
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