From: "Singh, Balbir" <sblbir@amazon.com>
To: "martin.petersen@oracle.com" <martin.petersen@oracle.com>
Cc: "axboe@kernel.dk" <axboe@kernel.dk>,
"Chaitanya.Kulkarni@wdc.com" <Chaitanya.Kulkarni@wdc.com>,
"mst@redhat.com" <mst@redhat.com>,
"jejb@linux.ibm.com" <jejb@linux.ibm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"Sangaraju, Someswarudu" <ssomesh@amazon.com>,
"hch@lst.de" <hch@lst.de>
Subject: Re: [resend v1 5/5] drivers/scsi/sd.c: Convert to use disk_set_capacity
Date: Tue, 7 Jan 2020 22:28:29 +0000 [thread overview]
Message-ID: <bc0575f1bb565f3955a411032f97163b2a5bd832.camel@amazon.com> (raw)
In-Reply-To: <yq1blrg2agh.fsf@oracle.com>
On Mon, 2020-01-06 at 22:48 -0500, Martin K. Petersen wrote:
> Balbir,
>
> > diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
> > index 5afb0046b12a..1a3be30b6b78 100644
> > --- a/drivers/scsi/sd.c
> > +++ b/drivers/scsi/sd.c
> > @@ -3184,7 +3184,7 @@ static int sd_revalidate_disk(struct gendisk *disk)
> >
> > sdkp->first_scan = 0;
> >
> > - set_capacity(disk, logical_to_sectors(sdp, sdkp->capacity));
> > + disk_set_capacity(disk, logical_to_sectors(sdp, sdkp->capacity));
> > sd_config_write_same(sdkp);
> > kfree(buffer);
>
> We already emit an SDEV_EVT_CAPACITY_CHANGE_REPORTED event if device
> capacity changes. However, this event does not automatically cause
> revalidation.
>
The proposed idea is to not reinforce revalidation, unless explictly specified
(in the thread before Bob Liu had suggestions). The goal is to notify user
space of changes via RESIZE. SCSI sd can opt out of this IOW, I can remove
this if you feel SDEV_EVT_CAPACITY_CHANGE_REPORTED is sufficient for current
use cases.
Balbir Singh.
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next prev parent reply other threads:[~2020-01-07 22:28 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-02 7:53 [resend v1 0/5] Add support for block disk resize notification Balbir Singh
2020-01-02 7:53 ` [resend v1 1/5] block/genhd: Notify udev about capacity change Balbir Singh
2020-01-03 6:16 ` Chaitanya Kulkarni
2020-01-04 4:44 ` Singh, Balbir
2020-01-04 22:32 ` Chaitanya Kulkarni
2020-01-08 15:02 ` hch
2020-01-07 3:32 ` Martin K. Petersen
2020-01-07 22:30 ` Singh, Balbir
2020-01-08 3:15 ` Martin K. Petersen
2020-01-08 15:04 ` hch
2020-01-21 19:57 ` Singh, Balbir
2020-01-02 7:53 ` [resend v1 2/5] drivers/block/virtio_blk.c: Convert to use disk_set_capacity Balbir Singh
2020-01-02 7:53 ` [resend v1 3/5] drivers/block/xen-blkfront.c: " Balbir Singh
2020-01-02 7:53 ` [resend v1 4/5] drivers/nvme/host/core.c: " Balbir Singh
2020-01-04 22:27 ` Chaitanya Kulkarni
2020-01-06 0:46 ` Singh, Balbir
2020-01-08 15:04 ` hch
2020-01-09 3:33 ` Martin K. Petersen
2020-01-09 13:12 ` Ewan D. Milne
2020-01-21 19:52 ` Singh, Balbir
2020-01-02 7:53 ` [resend v1 5/5] drivers/scsi/sd.c: " Balbir Singh
2020-01-02 22:21 ` Chaitanya Kulkarni
2020-01-03 0:23 ` Singh, Balbir
2020-01-07 3:48 ` Martin K. Petersen
2020-01-07 3:57 ` James Bottomley
2020-01-07 4:39 ` Martin K. Petersen
2020-01-07 21:37 ` Ewan D. Milne
2020-01-08 2:59 ` Martin K. Petersen
2020-01-08 21:27 ` Ewan D. Milne
2020-01-07 22:28 ` Singh, Balbir [this message]
2020-01-08 3:15 ` Martin K. Petersen
2020-01-08 4:20 ` Singh, Balbir
2020-01-08 21:32 ` Ewan D. Milne
2020-01-08 15:06 ` Christoph Hellwig
2020-01-09 2:53 ` Martin K. Petersen
2020-01-06 5:59 ` [resend v1 0/5] Add support for block disk resize notification Bob Liu
2020-01-06 8:47 ` Singh, Balbir
2020-01-06 9:08 ` Bob Liu
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