答复: 答复: [External Mail]Re: [PATCH] mm/cma.c: To better understand cma area during debugging, add total and used count logs to in cma_alloc

[高翔 <gaoxiang17@xxxxxxxxxx>]

I see.

before:

[   24.407814] cma: cma_alloc(cma (____ptrval____), name: reserved, count 1, align 0)

[   24.413397] cma: cma_alloc(cma (____ptrval____), name: reserved, count 1, align 0)

[   24.415886] cma: cma_alloc(cma (____ptrval____), name: reserved, count 1, align 0)

after:

[   24.097989] cma: cma_alloc(cma (____ptrval____), name: reserved, total count 16384, used count: 64, request count 1, align 0)

[   24.104260] cma: cma_alloc(cma (____ptrval____), name: reserved, total count 16384, used count: 65, request count 1, align 0)

[   24.107504] cma: cma_alloc(cma (____ptrval____), name: reserved, total count 16384, used count: 66, request count 1, align 0)

---

发件人: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
发送时间: 2024年9月25日 21:15:36
收件人: 高翔
抄送: Xiang Gao; linux-mm@xxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
主题: Re: 答复: [External Mail]Re: [PATCH] mm/cma.c: To better understand cma area during debugging, add total and used count logs to in cma_alloc

 

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On Wed, 25 Sep 2024 12:00:56 +0000 高翔 <gaoxiang17@xxxxxxxxxx> wrote:

> > [   24.225125] cma: cma_alloc(cma (____ptrval____), name: reserved, total count 16384, used count: 64, request count 1, align 0)
> > [   24.231963] cma: cma_alloc(cma (____ptrval____), name: reserved, total count 16384, used count: 65, request count 1, align 0)
> > [   24.235712] cma: cma_alloc(cma (____ptrval____), name: reserved, total count 16384, used count: 66, request count 1, align 0)
> >
>
>
> Above is the cma alloc during boot. The before-and-after context has nothing to do with cma alloc. Below is the log with before-and-after context added.
>
>
> [   24.006605] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
> [   24.071644] Serial: AMBA driver
> [   24.096063] arm-smmu-v3 9050000.smmuv3: ias 44-bit, oas 44-bit (features 0x00000305)
> [   24.097989] cma: cma_alloc(cma (____ptrval____), name: reserved, total count 16384, used count: 64, request count 1, align 0)
> [   24.104260] cma: cma_alloc(cma (____ptrval____), name: reserved, total count 16384, used count: 65, request count 1, align 0)
> [   24.107504] cma: cma_alloc(cma (____ptrval____), name: reserved, total count 16384, used count: 66, request count 1, align 0)
> [   24.140495] cacheinfo: Unable to detect cache hierarchy for CPU 0
> [   24.484998] loop: module loaded
> [   24.536152] virtio_blk virtio0: [vda] 4194304 512-byte logical blocks (2.15 GB/2.00 GiB)

What I mean is to paste the messages before the patch and to paste the
messages after the patch.  So readers can easily see what changed.

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