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From: Florian Weimer <fweimer@redhat.com>
To: "H.J. Lu" <hjl.tools@gmail.com>
Cc: GNU C Library <libc-alpha@sourceware.org>,
	Alexey Dobriyan <adobriyan@gmail.com>,
	linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
	linux-api@vger.kernel.org
Subject: Re: Avoid reading /sys/kernel/mm/transparent_hugepage/?
Date: Fri, 10 Apr 2026 09:27:59 +0200	[thread overview]
Message-ID: <lhupl47e0lc.fsf@oldenburg.str.redhat.com> (raw)
In-Reply-To: <CAMe9rOrk20jCXO_Bun4LK6M3fd_8HzEtAu94FW+-xSkwNiOt7w@mail.gmail.com> (H. J. Lu's message of "Fri, 10 Apr 2026 13:50:35 +0800")

* H. J. Lu:

> To enable THP segment load, ld.so opens and reads 2 files under
> /sys/kernel/mm/transparent_hugepage/.   This requires mounting
> /sys and is expensive.   Is it possible to put such info in vDSO?

Alexey Dobriyan proposed adding AT_PAGE_SHIFT_LIST to the auxiliary
vector a while back, but I don't know the status of that.

Thanks,
Florian


       reply	other threads:[~2026-04-10  7:28 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CAMe9rOrk20jCXO_Bun4LK6M3fd_8HzEtAu94FW+-xSkwNiOt7w@mail.gmail.com>
2026-04-10  7:27 ` Florian Weimer [this message]
2026-04-10  7:40   ` Avoid reading /sys/kernel/mm/transparent_hugepage/? H.J. Lu
2026-04-10  8:37     ` Alexey Dobriyan
2026-04-11  0:12       ` H.J. Lu

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