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From: "Thomas Hellström (VMware)" <thomas_os@shipmail.org>
To: Jerome Glisse <jglisse@redhat.com>
Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"Kirill A. Shutemov" <kirill@shutemov.name>
Subject: hmm pud-entry callback locking?
Date: Sat, 5 Oct 2019 14:29:40 +0200	[thread overview]
Message-ID: <4d25d751-d03a-29c6-950b-cafe8d201784@shipmail.org> (raw)

Hi, Jerome,

I was asked by Kirill to try to unify the pagewalk pud_entry and 
pmd_entry callbacks. The only user of the pagewalk pud-entry is 
currently hmm.

But the pagewalk code call pud_entry only for huge puds with the 
page-table lock held, whereas the hmm callback appears to assume it gets 
called unconditionally without the page-table lock held?

Could you shed some light into this?

Thanks,
Thomas




             reply	other threads:[~2019-10-05 12:29 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-05 12:29 Thomas Hellström (VMware) [this message]
2019-10-07 14:19 ` Jerome Glisse

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