Re: [PATCH] zram: take device and not only bvec offset into account

[Dusty Mabe <dusty@dustymabe.com>]

On 8/5/23 04:13, Christoph Hellwig wrote:
> On Sat, Aug 05, 2023 at 04:46:45PM +0900, Sergey Senozhatsky wrote:
>>> Fixes: af8b04c63708 ("zram: simplify bvec iteration in __zram_make_request")
>>> Reported-by: Dusty Mabe <dusty@dustymabe.com>
>>> Signed-off-by: Christoph Hellwig <hch@lst.de>
>>
>> Acked-by: Sergey Senozhatsky <senozhatsky@chromium.org>
> 
> Btw, are there any interesting test suites you want me to run on
> a > 4K page size system now that I do have this setup available?

The patch is passing tests for me. I ran the Fedora CoreOS root reprovision tests
(which are the tests that caught this bug to begin with) and the trivial reproducer:

```
#!/bin/bash
set -eux -o pipefail
modprobe zram num_devices=0
read dev < /sys/class/zram-control/hot_add
echo 10G > /sys/block/zram"${dev}"/disksize
mkfs.xfs /dev/zram"${dev}"
mkdir -p /tmp/foo
mount -t xfs /dev/zram"${dev}" /tmp/foo
```

Dusty