Re: [PATCH] sd: preserve sysfs updates to max_sectors_kb

[Bart Van Assche <Bart.VanAssche@wdc.com>]

On Mon, 2017-08-21 at 19:12 +0000, Don Brace wrote:
> On Friday Bart Van Assche wrote:
> > Can you check on your test system which udev rule changes
> > max_sectors_kb? I
> > have checked two recent Linux distro's but haven't been able to find
> > such a udev rule:
> > $ grep -rw max_sectors_kb /usr/lib/udev/rules.d /etc/udev/rules.d | wc
> > -l
> > 0
> > 
> > Thanks,
> > 
> > Bart.
> 
> On my system it is 60-block.rules, and it is the last rule in that rule
> file.
> --
> # do not edit this file, it will be overwritten on update
> 
> # enable in-kernel media-presence polling
> ACTION=="add", SUBSYSTEM=="module", KERNEL=="block",
> ATTR{parameters/events_dfl_poll_msecs}=="0", \
>   ATTR{parameters/events_dfl_poll_msecs}="2000"
> 
> # forward scsi device event to corresponding block device
> ACTION=="change", SUBSYSTEM=="scsi", ENV{DEVTYPE}=="scsi_device",
> TEST=="block", ATTR{block/*/uevent}="change"
> 
> # watch metadata changes, caused by tools closing the device node which
> was opened for writing
> ACTION!="remove", SUBSYSTEM=="block",
> KERNEL=="loop*|nvme*|sd*|vd*|xvd*|pmem*", OPTIONS+="watch"

Hello Don,

Can you have another look at the udev rules on your test system? The last
rule in 60-block.rules looks like a watch rule to me. The same holds for the
upstream version of that file (https://github.com/systemd/systemd/blob/maste
r/rules/60-block.rules).

Bart.