From: Nix <nix@esperi.org.uk>
To: Coly Li <colyli@suse.de>
Cc: linux-bcache@vger.kernel.org
Subject: Re: 5.11: WARN on long-running system
Date: Tue, 07 Sep 2021 13:07:00 +0100 [thread overview]
Message-ID: <87h7ewy4gr.fsf@esperi.org.uk> (raw)
In-Reply-To: <52ea2e1a-041d-b182-f345-c8c531dd4613@suse.de> (Coly Li's message of "Tue, 7 Sep 2021 12:12:43 +0800")
On 7 Sep 2021, Coly Li verbalised:
> On 9/1/21 9:15 PM, Nix wrote:
>> It is notable that the unused % of this cache volume has fallen to only
>> 3%: it's quite likely that this warning was emitted when it finally
>> (after three years or so!) ran out of free space and did its first
>> forced GC. I'm not sure how to tell.
> Hi Nix,
>
> I have the similar feeling as yours, that it has been a long time after previous gc running. I have no idea why the gc didn't run
> for such long time (this bucket was reused for 96 times). Let me try to find if there
> is any clue why the gc does not work for such long time.
It's probably just that my cache is 350GiB and it takes a long, long
time to fill that up. (As in, the unused % has been falling slowly for
three years and it's only just got close to zero in the last few
months.)
(Some GCs have run, but I have no idea why, given that when they ran the
unused % was about 40%.)
prev parent reply other threads:[~2021-09-07 12:07 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-01 13:15 5.11: WARN on long-running system Nix
2021-09-07 4:12 ` Coly Li
2021-09-07 12:07 ` Nix [this message]
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