From: Hannes Reinecke <hare@suse.de>
To: Bart Van Assche <bvanassche@acm.org>, Jens Axboe <axboe@kernel.dk>
Cc: Christoph Hellwig <hch@lst.de>, Ming Lei <ming.lei@gmail.com>,
linux-nvme@lists.infradead.org, linux-block@vger.kernel.org,
Hannes Reinecke <hare@suse.com>
Subject: Re: [PATCH] block: use static bio_set for bio_split() calls
Date: Thu, 25 Apr 2019 08:06:00 +0200 [thread overview]
Message-ID: <3ff02420-8063-490a-271d-b7032c9d3b42@suse.de> (raw)
In-Reply-To: <1556135351.161891.138.camel@acm.org>
On 4/24/19 9:49 PM, Bart Van Assche wrote:
> On Thu, 2019-04-18 at 16:06 +0200, Hannes Reinecke wrote:
>> +static int __init blk_bio_split_init(void)
>> +{
>> + return bioset_init(&bio_split_bio_set, BIO_POOL_SIZE, 0,
>> + BIOSET_NEED_BVECS);
>> +}
>
> The slab allocator uses __init for some of its initialization. Can it happen
> that blk_bio_split_init() is called before slab initialization has finished?
>
> Otherwise this patch looks fine to me.
>
Most unlikely.
We have another static bioset (fs_bio_set in block/bio.c) which is
initialised in the same manner.
Cheers,
Hannes
--
Dr. Hannes Reinecke Teamlead Storage & Networking
hare@suse.de +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Mary Higgins, Sri Rasiah
HRB 21284 (AG Nürnberg)
WARNING: multiple messages have this Message-ID (diff)
From: hare@suse.de (Hannes Reinecke)
Subject: [PATCH] block: use static bio_set for bio_split() calls
Date: Thu, 25 Apr 2019 08:06:00 +0200 [thread overview]
Message-ID: <3ff02420-8063-490a-271d-b7032c9d3b42@suse.de> (raw)
In-Reply-To: <1556135351.161891.138.camel@acm.org>
On 4/24/19 9:49 PM, Bart Van Assche wrote:
> On Thu, 2019-04-18@16:06 +0200, Hannes Reinecke wrote:
>> +static int __init blk_bio_split_init(void)
>> +{
>> + return bioset_init(&bio_split_bio_set, BIO_POOL_SIZE, 0,
>> + BIOSET_NEED_BVECS);
>> +}
>
> The slab allocator uses __init for some of its initialization. Can it happen
> that blk_bio_split_init() is called before slab initialization has finished?
>
> Otherwise this patch looks fine to me.
>
Most unlikely.
We have another static bioset (fs_bio_set in block/bio.c) which is
initialised in the same manner.
Cheers,
Hannes
--
Dr. Hannes Reinecke Teamlead Storage & Networking
hare at suse.de +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 N?rnberg
GF: Felix Imend?rffer, Mary Higgins, Sri Rasiah
HRB 21284 (AG N?rnberg)
next prev parent reply other threads:[~2019-04-25 6:06 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-18 14:06 [PATCH] block: use static bio_set for bio_split() calls Hannes Reinecke
2019-04-18 14:06 ` Hannes Reinecke
2019-04-18 14:34 ` Ming Lei
2019-04-18 14:34 ` Ming Lei
2019-04-18 15:02 ` Hannes Reinecke
2019-04-18 15:02 ` Hannes Reinecke
2019-04-18 18:26 ` Edmund Nadolski (Microsoft)
2019-04-18 18:26 ` Edmund Nadolski (Microsoft)
2019-04-24 17:20 ` Sagi Grimberg
2019-04-24 17:20 ` Sagi Grimberg
2019-04-24 18:56 ` Hannes Reinecke
2019-04-24 18:56 ` Hannes Reinecke
2019-04-24 18:58 ` Sagi Grimberg
2019-04-24 18:58 ` Sagi Grimberg
2019-04-24 22:14 ` Ming Lei
2019-04-24 22:14 ` Ming Lei
2019-04-25 0:41 ` Ming Lei
2019-04-25 0:41 ` Ming Lei
2019-04-25 14:32 ` Hannes Reinecke
2019-04-25 14:32 ` Hannes Reinecke
2019-04-25 15:36 ` Ming Lei
2019-04-25 15:36 ` Ming Lei
2019-04-30 11:48 ` Hannes Reinecke
2019-04-30 11:48 ` Hannes Reinecke
2019-04-24 19:49 ` Bart Van Assche
2019-04-24 19:49 ` Bart Van Assche
2019-04-25 6:06 ` Hannes Reinecke [this message]
2019-04-25 6:06 ` Hannes Reinecke
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