From: Matthew Wilcox <willy@infradead.org>
To: Jared Hu <jared.hu@nxp.com>
Cc: "akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"vbabka@suse.cz" <vbabka@suse.cz>,
"iamjoonsoo.kim@lge.com" <iamjoonsoo.kim@lge.com>,
"labbott@redhat.com" <labbott@redhat.com>,
"huyue2@yulong.com" <huyue2@yulong.com>,
"m.szyprowski@samsung.com" <m.szyprowski@samsung.com>,
"rppt@linux.ibm.com" <rppt@linux.ibm.com>,
"andreyknvl@google.com" <andreyknvl@google.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: question for cma alloc fail issue
Date: Wed, 10 Apr 2019 06:14:52 -0700 [thread overview]
Message-ID: <20190410131452.GA22763@bombadil.infradead.org> (raw)
In-Reply-To: <VE1PR04MB64290E25D6BAB7E702D08A54982E0@VE1PR04MB6429.eurprd04.prod.outlook.com>
On Wed, Apr 10, 2019 at 10:48:26AM +0000, Jared Hu wrote:
> 2. The pages that are free in cma->bitmap seem not free in Buddy system?
> PageBuddy() test can also return false even if the page is in the free list in cma bitmap
That's correct. They've been allocated by the CMA allocator, and are no
longer available for allocation by the page allocator.
next prev parent reply other threads:[~2019-04-10 13:15 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-10 10:48 Jared Hu
2019-04-10 13:14 ` Matthew Wilcox [this message]
-- strict thread matches above, loose matches on Subject: below --
2019-03-19 8:31 Jared Hu
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