From: Vishal Moola <vishal.moola@gmail.com>
To: Hyesoo Yu <hyesoo.yu@samsung.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm: page_alloc: check the order of compound page event when the order is 0
Date: Fri, 13 Oct 2023 13:54:08 -0700 [thread overview]
Message-ID: <ZSmucNWBMj/mNVeE@dhcp-10-159-238-251.vpn.oracle.com> (raw)
In-Reply-To: <20231012011106.2425309-1-hyesoo.yu@samsung.com>
On Thu, Oct 12, 2023 at 10:11:06AM +0900, Hyesoo Yu wrote:
> For compound pages, the head sets the PG_head flag and
> the tail sets the compound_head to indicate the head page.
> If a user allocates a compound page and frees it with a different
> order, the compound page information will not be properly
> initialized. To detect this problem, compound_page(page) and
> the order are compared, but it is not checked when the order is 0.
> That error should be checked regardless of the order.
I believe all compound pages are order >= 1, so this error can't occur
when the order is 0.
next prev parent reply other threads:[~2023-10-13 20:54 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20231012012153epcas2p34b8e9e8a898ace8d50411cadf937ef5d@epcas2p3.samsung.com>
2023-10-12 1:11 ` Hyesoo Yu
2023-10-13 20:54 ` Vishal Moola [this message]
2023-10-16 0:32 ` Hyesoo Yu
2023-10-16 3:28 ` Vishal Moola
2023-10-16 7:23 ` Hyesoo Yu
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