Re: [PATCH] block: tolerate 0 byte discard_granularity in __blkdev_issue_discard()

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To: Coly Li <colyli@xxxxxxx>, "linux-block@xxxxxxxxxxxxxxx" <linux-block@xxxxxxxxxxxxxxx>
Subject: Re: [PATCH] block: tolerate 0 byte discard_granularity in __blkdev_issue_discard()
From: Johannes Thumshirn <Johannes.Thumshirn@xxxxxxx>
Date: Tue, 4 Aug 2020 14:31:22 +0000
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Cc: "linux-bcache@xxxxxxxxxxxxxxx" <linux-bcache@xxxxxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, Ming Lei <ming.lei@xxxxxxxxxx>, Hannes Reinecke <hare@xxxxxxxx>, Xiao Ni <xni@xxxxxxxxxx>, Bart Van Assche <bvanassche@xxxxxxx>, Christoph Hellwig <hch@xxxxxx>, Enzo Matsumiya <ematsumiya@xxxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, Evan Green <evgreen@xxxxxxxxxxxx>
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Thread-topic: [PATCH] block: tolerate 0 byte discard_granularity in __blkdev_issue_discard()
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On 04/08/2020 16:23, Coly Li wrote:
> This is the procedure to reproduce the panic,
>   # modprobe scsi_debug delay=0 dev_size_mb=2048 max_queue=1
>   # losetup -f /dev/nvme0n1 --direct-io=on
>   # blkdiscard /dev/loop0 -o 0 -l 0x200

losetup -f /dev/sdX isn't it?

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