From: Michal Hocko <mhocko@suse.com>
To: Suren Baghdasaryan <surenb@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>,
tj@kernel.org, lizefan.x@bytedance.com, peterz@infradead.org,
johunt@akamai.com, keescook@chromium.org,
quic_sudaraja@quicinc.com, cgroups@vger.kernel.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/1] psi: remove 500ms min window size limitation for triggers
Date: Thu, 2 Mar 2023 18:41:47 +0100 [thread overview]
Message-ID: <ZADf27Kx5mbFev+I@dhcp22.suse.cz> (raw)
In-Reply-To: <CAJuCfpHF=9Dv_Yzph5jNmR1ZfTf7Lf=_oShztyLUq0ps_D=osQ@mail.gmail.com>
On Thu 02-03-23 08:13:54, Suren Baghdasaryan wrote:
[...]
> Let's roll this check without additional changes and then consolidate
> the checking inside psi_trigger_create() in a separate patch. If
> anybody objects to the late permission check we will just revert that
> last change without affecting anything else.
Permissions checks at write time are problematic because userspace
cannot drop privileges. Also I think it would be an antipattern for how
we do this in general.
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2023-03-02 17:41 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-01 19:34 Suren Baghdasaryan
2023-03-01 20:07 ` Johannes Weiner
2023-03-01 20:48 ` Suren Baghdasaryan
2023-03-01 21:00 ` Kalesh Singh
2023-03-02 15:30 ` Johannes Weiner
2023-03-02 16:13 ` Suren Baghdasaryan
2023-03-02 17:41 ` Michal Hocko [this message]
2023-03-02 17:58 ` Johannes Weiner
2023-03-02 13:58 ` Michal Hocko
2023-03-02 16:08 ` Suren Baghdasaryan
2023-03-02 17:39 ` Michal Hocko
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