linux-kernel - 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

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Message-Id: <20240925061536.e8abdbac3217d85f6f99afd5@linux-foundation.org>
Date: Wed, 25 Sep 2024 06:15:36 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: 高翔 <gaoxiang17@...omi.com>
Cc: Xiang Gao <gxxa03070307@...il.com>, "linux-mm@...ck.org"
 <linux-mm@...ck.org>, "linux-kernel@...r.kernel.org"
 <linux-kernel@...r.kernel.org>
Subject: 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

On Wed, 25 Sep 2024 12:00:56 +0000 高翔 <gaoxiang17@...omi.com> 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.