From: Christoph Hellwig <hch@lst.de>
To: John Garry <john.g.garry@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>,
axboe@kernel.dk, song@kernel.org, yukuai3@huawei.com,
kbusch@kernel.org, sagi@grimberg.me,
James.Bottomley@HansenPartnership.com,
martin.petersen@oracle.com, linux-block@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org,
linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org
Subject: Re: [PATCH RFC 4/4] md/raid0: Atomic write support
Date: Thu, 12 Sep 2024 17:10:38 +0200 [thread overview]
Message-ID: <20240912151038.GA5858@lst.de> (raw)
In-Reply-To: <340e4306-4442-4276-b420-6fee8ed97a7e@oracle.com>
On Thu, Sep 12, 2024 at 03:48:09PM +0100, John Garry wrote:
>
> I actually now think that I should change bio_split() to return NULL for
> splitting a REQ_ATOMIC, like what do for ZONE_APPEND - calling bio_split()
> like this is a common pattern in md RAID personalities. However, none of
> the md RAID code check for a NULL split, which they really should, so I can
> make that change also.
bio_split is a bit of a mess - even NULL isn't very good at returning
what caused it to fail. Maybe a switch to ERR_PTR and an audit of
all callers might be a good idea.
next prev parent reply other threads:[~2024-09-12 15:10 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-03 15:07 [PATCH RFC 0/4] RAID0 atomic write support John Garry
2024-09-03 15:07 ` [PATCH RFC 1/4] block: Make bdev_can_atomic_write() robust against mis-aligned bdev size John Garry
2024-09-12 13:15 ` Christoph Hellwig
2024-09-12 14:58 ` John Garry
2024-09-12 15:07 ` Christoph Hellwig
2024-09-12 15:22 ` John Garry
2024-09-13 8:36 ` Hannes Reinecke
2024-09-03 15:07 ` [PATCH RFC 2/4] block: Add BLK_FEAT_ATOMIC_WRITES flag John Garry
2024-09-12 13:16 ` Christoph Hellwig
2024-09-12 14:58 ` John Garry
2024-09-03 15:07 ` [PATCH RFC 3/4] block: Support atomic writes limits for stacked devices John Garry
2024-09-12 13:16 ` Christoph Hellwig
2024-09-12 15:05 ` John Garry
2024-09-03 15:07 ` [PATCH RFC 4/4] md/raid0: Atomic write support John Garry
2024-09-12 13:18 ` Christoph Hellwig
2024-09-12 14:48 ` John Garry
2024-09-12 15:10 ` Christoph Hellwig [this message]
2024-09-12 15:38 ` John Garry
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