linux-kernel - Re: [PATCH] md/raid1: change r1conf->r1bio

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Message-ID: <60ab8135-b22b-169e-cfbe-19abf7257d88@huaweicloud.com>
Date: Thu, 19 Jun 2025 17:02:02 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: Wang Jinchao <wangjinchao600@...il.com>, Song Liu <song@...nel.org>
Cc: linux-raid@...r.kernel.org, linux-kernel@...r.kernel.org,
 "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH] md/raid1: change r1conf->r1bio_pool to a pointer type

Hi,

在 2025/06/18 19:41, Wang Jinchao 写道:
> In raid1_reshape(), newpool is a stack variable.
> mempool_init() initializes newpool->wait with the stack address.
> After assigning newpool to conf->r1bio_pool, the wait queue
> need to be reinitialized, which is not ideal.
> 
> Change raid1_conf->r1bio_pool to a pointer type and
> replace mempool_init() with mempool_create() to
> avoid referencing a stack-based wait queue.

Can you also switch to kmalloc pool in this patch?

Thanks,
Kuai