mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: "Liao, Chang" <liaochang1@huawei.com>
To: <mhiramat@kernel.org>, <oleg@redhat.com>, <peterz@infradead.org>,
	<catalin.marinas@arm.com>, <will@kernel.org>,
	<mark.rutland@arm.com>
Cc: <linux-kernel@vger.kernel.org>,
	<linux-trace-kernel@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH] arm64: uprobes: Optimize cache flushes for xol slot
Date: Wed, 6 Nov 2024 17:55:16 +0800	[thread overview]
Message-ID: <3d166642-4062-42ed-9e24-1771cd819110@huawei.com> (raw)
In-Reply-To: <20240919121719.2148361-1-liaochang1@huawei.com>

Hi, Will and Catalin

在 2024/9/19 20:17, Liao Chang 写道:
> On 09/23, Will Deacon wrote:
>> However, we should use __GFP_ZERO anyway
>> because I don't think it's a good idea to map an uninitialised page into
>> userspace.
> Agreed, and imo this even needs a separate "fix info leak" patch.
> 
> Oleg.

Given that Oleg's fix info leak patch has been merged [1], the risk of leakage
is gone. So I am looking forward to your options about this patch. As many
functions start with same instructions like 'stp fp, lr, [sp, #imm]' or
'paciasp'. So I think this patch could avoid unnecessary D/I cache synchronization.

[1] https://lore.kernel.org/all/20240929162047.GA12611@redhat.com/

-- 
BR
Liao, Chang


  parent reply	other threads:[~2024-11-06  9:55 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-09-19 12:17 Liao Chang
2024-09-19 14:18 ` Oleg Nesterov
2024-09-20  8:58   ` Liao, Chang
2024-09-20 11:03     ` Oleg Nesterov
2024-09-20 15:32     ` Catalin Marinas
2024-09-20 17:32       ` Oleg Nesterov
2024-09-22 14:09         ` Will Deacon
2024-09-22 14:39           ` Oleg Nesterov
2024-09-23 11:16           ` Liao, Chang
2024-09-23  1:57       ` Liao, Chang
2024-09-23  7:18         ` Will Deacon
2024-09-23 10:52           ` Oleg Nesterov
2024-09-26 12:06             ` Liao, Chang
2024-09-26 16:08               ` Oleg Nesterov
2024-09-23 11:16           ` Liao, Chang
2024-09-23 16:03           ` Catalin Marinas
2024-11-06  9:55 ` Liao, Chang [this message]
2024-11-07 18:35   ` Catalin Marinas
2024-11-08 16:49 ` Catalin Marinas

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=3d166642-4062-42ed-9e24-1771cd819110@huawei.com \
    --to=liaochang1@huawei.com \
    --cc=catalin.marinas@arm.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-trace-kernel@vger.kernel.org \
    --cc=mark.rutland@arm.com \
    --cc=mhiramat@kernel.org \
    --cc=oleg@redhat.com \
    --cc=peterz@infradead.org \
    --cc=will@kernel.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
all inboxes | Powered by JetHome®