linux-kernel - Re: [PATCH] lazy freeing of memory through MADV

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 24 Apr 2007 14:42:02 +1000
From:	Paul Mackerras <paulus@...ba.org>
To:	Rik van Riel <riel@...hat.com>
Cc:	Nick Piggin <nickpiggin@...oo.com.au>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>, shak <dshaks@...hat.com>,
	jakub@...hat.com, drepper@...hat.com
Subject: Re: [PATCH] lazy freeing of memory through MADV_FREE

Rik van Riel writes:

> I guess we'll need to call tlb_remove_tlb_entry() inside the
> MADV_FREE code to keep powerpc happy.

I don't see why; once ptep_test_and_clear_young has returned, the
entry in the hash table has already been removed.  Adding the
tlb_remove_tlb_entry call certainly won't do anything on 64-bit
powerpc, since it expands to do {} while (0) there, and in fact it
won't do anything on 32-bit powerpc either.

Paul.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/