From: Jens Axboe <axboe@kernel.dk>
To: Bart Van Assche <bvanassche@acm.org>,
Zhu Yanjun <yanjun.zhu@linux.dev>,
Shinichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Cc: "linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
"nbd@other.debian.org" <nbd@other.debian.org>,
"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>
Subject: Re: blktests failures with v6.12-rc1 kernel
Date: Sat, 5 Oct 2024 15:45:46 -0600 [thread overview]
Message-ID: <dd003ffd-c63a-496a-8585-52fbb08c2189@kernel.dk> (raw)
In-Reply-To: <d5fe08b6-68df-4d67-8870-dd7ae391973e@acm.org>
On 10/5/24 3:36 PM, Bart Van Assche wrote:
> On 10/4/24 6:41 PM, Jens Axboe wrote:
>> That seems over-engineered. Seems to me that either these things should
>> share a slab cache (why do they need one each, if they are the same
>> sized object?!).
>
> The size of two of the three slab caches is variable.
>
>> And if they really do need one, surely something ala:
>>
>> static atomic_long_t slab_index;
>>
>> sprintf(slab_name, "foo-%ld", atomic_inc_return(&slab_index));
>>
>> would be all you need.
>
> A 32-bit counter wraps around after about 4 billion iterations, isn't
> it?
I did use an atomic_long_t, just forgot to use that for the pseudo
code inc and return. Though I highly doubt it matters in practice...
--
Jens Axboe
prev parent reply other threads:[~2024-10-05 21:45 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-03 8:02 blktests failures with v6.12-rc1 kernel Shinichiro Kawasaki
2024-10-03 20:56 ` Bart Van Assche
2024-10-04 2:35 ` Zhu Yanjun
2024-10-04 2:40 ` Shinichiro Kawasaki
2024-10-04 12:40 ` Zhu Yanjun
2024-10-04 16:31 ` Bart Van Assche
2024-10-05 1:26 ` Zhu Yanjun
2024-10-05 1:41 ` Jens Axboe
2024-10-05 8:18 ` Zhu Yanjun
2024-10-05 21:36 ` Bart Van Assche
2024-10-05 21:45 ` Jens Axboe [this message]
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