From: Christoph Hellwig <hch@lst.de>
To: John Garry <john.g.garry@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>,
axboe@kernel.dk, kbusch@kernel.org, sagi@grimberg.me,
jejb@linux.ibm.com, martin.petersen@oracle.com,
djwong@kernel.org, viro@zeniv.linux.org.uk, brauner@kernel.org,
dchinner@redhat.com, jack@suse.cz, linux-block@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org,
linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
tytso@mit.edu, jbongio@google.com, linux-scsi@vger.kernel.org,
ming.lei@redhat.com, ojaswin@linux.ibm.com, bvanassche@acm.org,
Alan Adamson <alan.adamson@oracle.com>
Subject: Re: [PATCH v3 14/15] nvme: Support atomic writes
Date: Wed, 14 Feb 2024 09:00:24 +0100 [thread overview]
Message-ID: <20240214080024.GA10357@lst.de> (raw)
In-Reply-To: <0323ba69-dff9-4465-817e-2c349141b753@oracle.com>
On Tue, Feb 13, 2024 at 02:21:25PM +0000, John Garry wrote:
>> Please also read through TP4098(a) and look at the MAM field.
>
> It's not public, AFAIK.
Oracle is a member, so you can take a look at it easily. If we need
it for Linux I can also work with the NVMe Board to release it.
> And I don't think a feature which allows us to straddle boundaries is too
> interesting really.
Without MAM=1 NVMe can't support atomic writes larger than
AWUPF/NAWUPF, which is typically set to the indirection table
size. You're leaving a lot of potential unused with that.
next prev parent reply other threads:[~2024-02-14 8:00 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-24 11:38 [PATCH v3 00/15] block atomic writes John Garry
2024-01-24 11:38 ` [PATCH v3 01/15] block: Add atomic write operations to request_queue limits John Garry
2024-02-13 6:22 ` Christoph Hellwig
2024-01-24 11:38 ` [PATCH v3 02/15] block: Limit atomic writes according to bio and queue limits John Garry
2024-02-13 4:33 ` Ritesh Harjani
2024-02-13 8:05 ` John Garry
2024-01-24 11:38 ` [PATCH v3 03/15] fs/bdev: Add atomic write support info to statx John Garry
2024-01-24 11:38 ` [PATCH v3 04/15] fs: Add RWF_ATOMIC and IOCB_ATOMIC flags for atomic write support John Garry
2024-01-24 11:38 ` [PATCH v3 05/15] block: Add REQ_ATOMIC flag John Garry
2024-02-13 6:24 ` Christoph Hellwig
2024-01-24 11:38 ` [PATCH v3 06/15] block: Pass blk_queue_get_max_sectors() a request pointer John Garry
2024-02-13 6:23 ` Christoph Hellwig
2024-02-13 8:15 ` John Garry
2024-01-24 11:38 ` [PATCH v3 07/15] block: Limit atomic write IO size according to atomic_write_max_sectors John Garry
2024-02-13 6:26 ` Christoph Hellwig
2024-02-13 8:15 ` John Garry
2024-02-14 7:26 ` Christoph Hellwig
2024-02-14 9:24 ` John Garry
2024-01-24 11:38 ` [PATCH v3 08/15] block: Error an attempt to split an atomic write bio John Garry
2024-01-24 11:38 ` [PATCH v3 09/15] block: Add checks to merging of atomic writes John Garry
2024-02-12 10:54 ` Nilay Shroff
2024-02-12 11:20 ` [PATCH " John Garry
2024-02-12 12:01 ` Nilay Shroff
2024-02-12 12:09 ` John Garry
2024-02-13 6:52 ` Nilay Shroff
2024-01-24 11:38 ` [PATCH v3 10/15] block: Add fops atomic write support John Garry
2024-02-13 9:36 ` Nilay Shroff
2024-02-13 9:58 ` [PATCH " John Garry
2024-02-13 11:08 ` Nilay Shroff
2024-02-13 11:52 ` John Garry
2024-02-14 9:38 ` Nilay Shroff
2024-02-14 11:29 ` John Garry
2024-02-14 11:47 ` Nilay Shroff
2024-01-24 11:38 ` [PATCH v3 11/15] scsi: sd: Support reading atomic write properties from block limits VPD John Garry
2024-02-13 6:31 ` Christoph Hellwig
2024-02-13 8:16 ` John Garry
2024-01-24 11:38 ` [PATCH v3 12/15] scsi: sd: Add WRITE_ATOMIC_16 support John Garry
2024-01-24 11:38 ` [PATCH v3 13/15] scsi: scsi_debug: Atomic write support John Garry
2024-01-24 11:38 ` [PATCH v3 14/15] nvme: Support atomic writes John Garry
2024-02-13 6:42 ` Christoph Hellwig
2024-02-13 14:21 ` John Garry
2024-02-14 8:00 ` Christoph Hellwig [this message]
2024-02-14 9:21 ` John Garry
2024-02-14 12:27 ` Nilay Shroff
2024-02-14 13:02 ` John Garry
2024-02-14 16:45 ` Nilay Shroff
2024-01-24 11:38 ` [PATCH v3 15/15] nvme: Ensure atomic writes will be executed atomically John Garry
2024-01-25 0:52 ` Keith Busch
2024-01-25 11:28 ` John Garry
2024-01-29 6:20 ` Christoph Hellwig
2024-01-29 9:36 ` John Garry
2024-01-29 14:39 ` Christoph Hellwig
2024-01-26 3:50 ` Chaitanya Kulkarni
2024-02-13 6:42 ` Christoph Hellwig
2024-02-13 14:07 ` John Garry
2024-01-29 6:18 ` [PATCH v3 00/15] block atomic writes Christoph Hellwig
2024-01-29 9:17 ` John Garry
2024-02-06 18:44 ` John Garry
2024-02-10 12:12 ` David Laight
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