From: Matthew Wilcox <willy@infradead.org>
To: Igor Stoppa <igor.stoppa@huawei.com>
Cc: david@fromorbit.com, rppt@linux.vnet.ibm.com,
keescook@chromium.org, mhocko@kernel.org, labbott@redhat.com,
linux-security-module@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org,
kernel-hardening@lists.openwall.com
Subject: Re: [PATCH 4/8] struct page: add field for vm_struct
Date: Tue, 13 Mar 2018 15:00:40 -0700 [thread overview]
Message-ID: <20180313220040.GA15791@bombadil.infradead.org> (raw)
In-Reply-To: <20180313214554.28521-5-igor.stoppa@huawei.com>
On Tue, Mar 13, 2018 at 11:45:50PM +0200, Igor Stoppa wrote:
> When a page is used for virtual memory, it is often necessary to obtain
> a handler to the corresponding vm_struct, which refers to the virtually
> continuous area generated when invoking vmalloc.
>
> The struct page has a "mapping" field, which can be re-used, to store a
> pointer to the parent area.
>
> This will avoid more expensive searches, later on.
>
> Signed-off-by: Igor Stoppa <igor.stoppa@huawei.com>
Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>
Regardless of the fate of the rest of this patchset, this makes sense
and we should have this.
WARNING: multiple messages have this Message-ID (diff)
From: willy@infradead.org (Matthew Wilcox)
To: linux-security-module@vger.kernel.org
Subject: [PATCH 4/8] struct page: add field for vm_struct
Date: Tue, 13 Mar 2018 15:00:40 -0700 [thread overview]
Message-ID: <20180313220040.GA15791@bombadil.infradead.org> (raw)
In-Reply-To: <20180313214554.28521-5-igor.stoppa@huawei.com>
On Tue, Mar 13, 2018 at 11:45:50PM +0200, Igor Stoppa wrote:
> When a page is used for virtual memory, it is often necessary to obtain
> a handler to the corresponding vm_struct, which refers to the virtually
> continuous area generated when invoking vmalloc.
>
> The struct page has a "mapping" field, which can be re-used, to store a
> pointer to the parent area.
>
> This will avoid more expensive searches, later on.
>
> Signed-off-by: Igor Stoppa <igor.stoppa@huawei.com>
Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>
Regardless of the fate of the rest of this patchset, this makes sense
and we should have this.
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next prev parent reply other threads:[~2018-03-13 22:00 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-13 21:45 [RFC PATCH v19 0/8] mm: security: ro protection for dynamic data Igor Stoppa
2018-03-13 21:45 ` Igor Stoppa
2018-03-13 21:45 ` Igor Stoppa
2018-03-13 21:45 ` [PATCH 1/8] genalloc: track beginning of allocations Igor Stoppa
2018-03-13 21:45 ` Igor Stoppa
2018-03-13 21:45 ` Igor Stoppa
2018-03-13 21:45 ` [PATCH 2/8] Add label to genalloc.rst for cross reference Igor Stoppa
2018-03-13 21:45 ` Igor Stoppa
2018-03-13 21:45 ` Igor Stoppa
2018-03-13 21:45 ` [PATCH 3/8] genalloc: selftest Igor Stoppa
2018-03-13 21:45 ` Igor Stoppa
2018-03-13 21:45 ` Igor Stoppa
2018-03-13 21:45 ` [PATCH 4/8] struct page: add field for vm_struct Igor Stoppa
2018-03-13 21:45 ` Igor Stoppa
2018-03-13 21:45 ` Igor Stoppa
2018-03-13 22:00 ` Matthew Wilcox [this message]
2018-03-13 22:00 ` Matthew Wilcox
2018-03-14 17:43 ` J Freyensee
2018-03-14 17:43 ` J Freyensee
2018-03-15 9:38 ` Igor Stoppa
2018-03-15 9:38 ` Igor Stoppa
2018-03-15 9:38 ` Igor Stoppa
2018-03-15 18:51 ` J Freyensee
2018-03-15 18:51 ` J Freyensee
2018-03-13 21:45 ` [PATCH 5/8] Protectable Memory Igor Stoppa
2018-03-13 21:45 ` Igor Stoppa
2018-03-13 21:45 ` Igor Stoppa
2018-03-14 12:15 ` Matthew Wilcox
2018-03-14 12:15 ` Matthew Wilcox
2018-03-14 13:02 ` Igor Stoppa
2018-03-14 13:02 ` Igor Stoppa
2018-03-14 13:02 ` Igor Stoppa
2018-03-14 17:40 ` J Freyensee
2018-03-14 17:40 ` J Freyensee
2018-03-14 17:40 ` J Freyensee
2018-03-13 21:45 ` [PATCH 6/8] Pmalloc selftest Igor Stoppa
2018-03-13 21:45 ` Igor Stoppa
2018-03-13 21:45 ` Igor Stoppa
2018-03-14 12:25 ` Matthew Wilcox
2018-03-14 12:25 ` Matthew Wilcox
2018-03-25 1:32 ` Igor Stoppa
2018-03-25 1:32 ` Igor Stoppa
2018-03-25 1:32 ` Igor Stoppa
2018-03-13 21:45 ` [PATCH 7/8] lkdtm: crash on overwriting protected pmalloc var Igor Stoppa
2018-03-13 21:45 ` Igor Stoppa
2018-03-13 21:45 ` Igor Stoppa
2018-03-13 21:45 ` [PATCH 8/8] Documentation for Pmalloc Igor Stoppa
2018-03-13 21:45 ` Igor Stoppa
2018-03-13 21:45 ` Igor Stoppa
2018-03-14 11:21 ` [RFC PATCH v19 0/8] mm: security: ro protection for dynamic data Igor Stoppa
2018-03-14 11:21 ` Igor Stoppa
2018-03-14 11:21 ` Igor Stoppa
2018-03-14 11:56 ` Matthew Wilcox
2018-03-14 11:56 ` Matthew Wilcox
2018-03-14 12:55 ` Igor Stoppa
2018-03-14 12:55 ` Igor Stoppa
2018-03-14 12:55 ` Igor Stoppa
2018-03-14 13:04 ` Matthew Wilcox
2018-03-14 13:04 ` Matthew Wilcox
2018-03-14 16:11 ` Igor Stoppa
2018-03-14 16:11 ` Igor Stoppa
2018-03-14 16:11 ` Igor Stoppa
2018-03-14 17:33 ` Matthew Wilcox
2018-03-14 17:33 ` Matthew Wilcox
2018-03-15 13:43 ` Igor Stoppa
2018-03-15 13:43 ` Igor Stoppa
2018-03-15 13:43 ` Igor Stoppa
2018-03-19 18:04 ` Igor Stoppa
2018-03-19 18:04 ` Igor Stoppa
2018-03-19 18:04 ` Igor Stoppa
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