From: Hillf Danton <hdanton@sina.com>
To: John Stultz <john.stultz@linaro.org>
Cc: Sudipto Paul <Sudipto.Paul@arm.com>,
Vincent Donnefort <Vincent.Donnefort@arm.com>,
Chenbo Feng <fengc@google.com>,
lkml <linux-kernel@vger.kernel.org>,
Liam Mark <lmark@codeaurora.org>,
Christoph Hellwig <hch@infradead.org>,
Alistair Strachan <astrachan@google.com>,
dri-devel@lists.freedesktop.org, "Andrew F . Davis" <afd@ti.com>,
Hridya Valsaraju <hridya@google.com>,
Pratik Patel <pratikp@codeaurora.org>
Subject: Re: [RESEND][PATCH v8 4/5] dma-buf: heaps: Add CMA heap to dmabuf heaps
Date: Mon, 30 Sep 2019 16:14:34 +0800 [thread overview]
Message-ID: <20190930081434.248-1-hdanton@sina.com> (raw)
In-Reply-To: <20190906184712.91980-1-john.stultz@linaro.org>
On Fri, 6 Sep 2019 18:47:09 +0000 John Stultz wrote:
>
> + cma_pages = cma_alloc(cma_heap->cma, nr_pages, align, false);
> + if (!cma_pages)
> + goto free_buf;
> +
> + if (PageHighMem(cma_pages)) {
> + unsigned long nr_clear_pages = nr_pages;
> + struct page *page = cma_pages;
> +
> + while (nr_clear_pages > 0) {
> + void *vaddr = kmap_atomic(page);
> +
> + memset(vaddr, 0, PAGE_SIZE);
> + kunmap_atomic(vaddr);
> + page++;
> + nr_clear_pages--;
> + }
> + } else {
> + memset(page_address(cma_pages), 0, size);
> + }
Take a breath after zeroing a page, and a peep at pending signal.
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next prev parent reply other threads:[~2019-09-30 8:54 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-06 18:47 [RESEND][PATCH v8 0/5] DMA-BUF Heaps (destaging ION) John Stultz
2019-09-06 18:47 ` [RESEND][PATCH v8 1/5] dma-buf: Add dma-buf heaps framework John Stultz
2019-09-06 18:47 ` John Stultz
2019-09-23 22:08 ` Brian Starkey
2019-09-23 22:08 ` Brian Starkey
2019-09-24 17:10 ` John Stultz
2019-09-24 17:10 ` John Stultz
2019-09-06 18:47 ` [RESEND][PATCH v8 2/5] dma-buf: heaps: Add heap helpers John Stultz
2019-09-23 22:08 ` Brian Starkey
2019-09-06 18:47 ` [RESEND][PATCH v8 3/5] dma-buf: heaps: Add system heap to dmabuf heaps John Stultz
2019-09-06 18:47 ` John Stultz
2019-09-23 22:09 ` Brian Starkey
2019-09-06 18:47 ` [RESEND][PATCH v8 4/5] dma-buf: heaps: Add CMA " John Stultz
2019-09-06 18:47 ` John Stultz
2019-09-23 22:10 ` Brian Starkey
2019-09-23 22:10 ` Brian Starkey
2019-09-06 18:47 ` [RESEND][PATCH v8 5/5] kselftests: Add dma-heap test John Stultz
2019-09-06 18:47 ` John Stultz
2019-09-23 22:11 ` Brian Starkey
2019-09-26 21:36 ` John Stultz
2019-09-27 9:20 ` Brian Starkey
2019-09-27 9:20 ` Brian Starkey
2019-09-19 16:51 ` [RESEND][PATCH v8 0/5] DMA-BUF Heaps (destaging ION) Sumit Semwal
2019-09-19 16:51 ` Sumit Semwal
2019-09-24 16:22 ` Ayan Halder
2019-09-24 16:28 ` John Stultz
2019-10-09 17:37 ` Ayan Halder
2019-10-09 17:37 ` Ayan Halder
2019-10-09 18:27 ` Andrew F. Davis
2019-10-14 9:07 ` Brian Starkey
2019-10-14 9:07 ` Brian Starkey
2019-10-16 17:40 ` Andrew F. Davis
2019-10-16 17:40 ` Andrew F. Davis
2019-10-17 19:14 ` John Stultz
2019-10-17 19:14 ` John Stultz
2019-10-17 19:29 ` Andrew F. Davis
2019-10-17 20:57 ` John Stultz
2019-10-17 20:57 ` John Stultz
2019-10-18 9:55 ` Brian Starkey
2019-10-18 9:55 ` Brian Starkey
2019-10-18 18:33 ` John Stultz
2019-10-18 18:41 ` Ayan Halder
2019-10-18 18:41 ` Ayan Halder
2019-10-18 18:49 ` John Stultz
2019-10-18 18:49 ` John Stultz
2019-10-18 18:57 ` Ayan Halder
2019-10-18 18:57 ` Ayan Halder
2019-10-18 19:04 ` John Stultz
2019-10-19 13:41 ` Andrew F. Davis
2019-10-19 13:41 ` Andrew F. Davis
2019-10-21 9:18 ` Brian Starkey
2019-10-22 13:51 ` Ayan Halder
2019-10-22 13:51 ` Ayan Halder
2019-10-18 18:51 ` Ayan Halder
2019-10-16 17:34 ` John Stultz
2019-09-30 3:26 ` [RESEND][PATCH v8 1/5] dma-buf: Add dma-buf heaps framework Hillf Danton
2019-10-02 16:14 ` John Stultz
2019-09-30 7:43 ` [RESEND][PATCH v8 3/5] dma-buf: heaps: Add system heap to dmabuf heaps Hillf Danton
2019-10-01 20:50 ` John Stultz
2019-10-01 20:50 ` John Stultz
2019-09-30 8:14 ` Hillf Danton [this message]
2019-10-02 16:15 ` [RESEND][PATCH v8 4/5] dma-buf: heaps: Add CMA " John Stultz
2019-10-02 16:15 ` John Stultz
2019-09-30 13:40 ` [RESEND][PATCH v8 0/5] DMA-BUF Heaps (destaging ION) Laura Abbott
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