From: Michal Hocko <mhocko@suse.com>
To: Minchan Kim <minchan@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-mm <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
hyesoo.yu@samsung.com, david@redhat.com, surenb@google.com,
pullip.cho@samsung.com, joaodias@google.com, hridya@google.com,
john.stultz@linaro.org, sumit.semwal@linaro.org,
linux-media@vger.kernel.org, devicetree@vger.kernel.org,
hch@infradead.org, robh+dt@kernel.org,
linaro-mm-sig@lists.linaro.org
Subject: Re: [PATCH v4 1/4] mm: cma: introduce gfp flag in cma_alloc instead of no_warn
Date: Mon, 25 Jan 2021 14:07:01 +0100 [thread overview]
Message-ID: <20210125130701.GF827@dhcp22.suse.cz> (raw)
In-Reply-To: <20210121175502.274391-2-minchan@kernel.org>
On Thu 21-01-21 09:54:59, Minchan Kim wrote:
> The upcoming patch will introduce __GFP_NORETRY semantic
> in alloc_contig_range which is a failfast mode of the API.
> Instead of adding a additional parameter for gfp, replace
> no_warn with gfp flag.
>
> To keep old behaviors, it follows the rule below.
>
> no_warn gfp_flags
>
> false GFP_KERNEL
> true GFP_KERNEL|__GFP_NOWARN
> gfp & __GFP_NOWARN GFP_KERNEL | (gfp & __GFP_NOWARN)
>
> Reviewed-by: Suren Baghdasaryan <surenb@google.com>
> Signed-off-by: Minchan Kim <minchan@kernel.org>
[...]
> diff --git a/mm/cma.c b/mm/cma.c
> index 0ba69cd16aeb..d50627686fec 100644
> --- a/mm/cma.c
> +++ b/mm/cma.c
> @@ -419,13 +419,13 @@ static inline void cma_debug_show_areas(struct cma *cma) { }
> * @cma: Contiguous memory region for which the allocation is performed.
> * @count: Requested number of pages.
> * @align: Requested alignment of pages (in PAGE_SIZE order).
> - * @no_warn: Avoid printing message about failed allocation
> + * @gfp_mask: GFP mask to use during the cma allocation.
Call out supported gfp flags explicitly. Have a look at kvmalloc_node
for a guidance.
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2021-01-26 4:41 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-21 17:54 [PATCH v4 0/4] Chunk Heap Support on DMA-HEAP Minchan Kim
2021-01-21 17:54 ` [PATCH v4 1/4] mm: cma: introduce gfp flag in cma_alloc instead of no_warn Minchan Kim
2021-01-21 18:46 ` David Hildenbrand
2021-01-21 18:50 ` Minchan Kim
2021-01-25 13:07 ` Michal Hocko [this message]
2021-01-25 19:42 ` Minchan Kim
2021-01-26 7:38 ` Michal Hocko
2021-01-26 19:12 ` Minchan Kim
2021-01-27 20:21 ` Minchan Kim
2021-01-21 17:55 ` [PATCH v4 2/4] mm: failfast mode with __GFP_NORETRY in alloc_contig_range Minchan Kim
2021-01-25 13:12 ` Michal Hocko
2021-01-25 13:13 ` Michal Hocko
2021-01-25 19:33 ` Minchan Kim
2021-01-26 7:44 ` Michal Hocko
2021-01-26 19:10 ` Minchan Kim
2021-01-27 8:14 ` Michal Hocko
2021-01-27 20:42 ` Minchan Kim
2021-01-28 7:53 ` Michal Hocko
2021-01-28 16:56 ` Minchan Kim
2021-01-21 17:55 ` [PATCH v4 3/4] dt-bindings: reserved-memory: Make DMA-BUF CMA heap DT-configurable Minchan Kim
2021-01-26 7:07 ` John Stultz
2021-01-27 20:25 ` Hridya Valsaraju
2021-02-05 22:55 ` Rob Herring
2021-01-21 17:55 ` [PATCH v4 4/4] dma-buf: heaps: add chunk heap to dmabuf heaps Minchan Kim
2021-01-26 7:07 ` Christoph Hellwig
2021-01-26 19:27 ` Minchan Kim
2021-01-26 7:32 ` John Stultz
2021-01-26 19:24 ` Minchan Kim
2021-01-26 7:46 ` Michal Hocko
2021-01-26 19:25 ` Minchan Kim
2021-01-27 8:09 ` Michal Hocko
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