[DRBD-user] Strange problem with output of /proc/drbd

Bram Klein Gunnewiek bram at shockmedia.nl
Fri Jun 12 15:14:34 CEST 2015

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

On 06/12/2015 03:08 PM, Lars Ellenberg wrote:
> On Fri, Jun 12, 2015 at 02:04:20PM +0200, Bram Klein Gunnewiek wrote:
>> Obviously I mean verify progress, not resync progress
> my git foo suggests that this was always ok out-of-tree, but was broken
> by a merge mishap back in 2010 when bringing some patches from
> out-of-tree to in-tree.  went unnoticed for some time (because most
> people still use the out-of-tree module, for $reasons), but was later
> fixed in 2014, mainline linux 3.18.

Thanks for your explanation! We added a work-around to fix the output of 
/proc/drbd, that'll do for now!

>> On 06/12/2015 01:33 PM, Bram Klein Gunnewiek wrote:
>>> Version info:
>>> version: 8.4.3 (api:1/proto:86-101)
>>> srcversion: 6551AD2C98F533733BE558C
>>> When /proc/drbd shows resync progress the progress for disks that
>>> are bigger then "a few gb" don't display a newline character after
>>> the size denomination (M). Smaller disks do show the newline. I
>>> checked the source code (latest but also 8.4.1 and 8.4.3) and
>>> afaik it should print a newline character (in function
>>> drbd_syncer_progress).
>>> Is this a known bug or something realy specific to the verion
>>> ubuntu compiled? We are parsing the output and its pretty
>>> difficult to do this properly without a newline and/or space
>>> between 'M' and 'finish'.
>>> Correct output:
>>> 0: cs:VerifyS ro:Secondary/Secondary ds:UpToDate/UpToDate C r-----
>>>     ns:0 nr:0 dw:0 dr:40376 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
>>>     [>...................] verified:  8.6% (483912/524288)K
>>>     finish: 0:02:35 speed: 3,104 (3,104) want: 5,640 K/sec
>>> Wrong output (missing a newline):
>>> 1: cs:VerifyS ro:Primary/Secondary ds:UpToDate/UpToDate C r-----
>>>     ns:0 nr:0 dw:0 dr:25250432 al:0 bm:0 lo:64 pe:6175 ua:129 ap:0
>>> ep:1 wo:f oos:0
>>>     [=============>......] verified: 72.0% (4016/14336)Mfinish:
>>> 0:01:36 speed: 42,620 (42,604) want: 57,560 K/sec

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