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From: Tomas Vondra <[email protected]>
To: Andrea Gelmini <[email protected]>
To: Michael Harris <[email protected]>
To: PostgreSQL-development <[email protected]>
Subject: Re: FileFallocate misbehaving on XFS
Date: Mon, 9 Dec 2024 11:14:22 +0100
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAK-xaQY+8bRFDbhtWBLTSUUKMBH51DhHqKgbNf7meALKq36Waw@mail.gmail.com>
References: <CADofcAV8xu3hCNHq7-7x56KrP9rD6=A04=qjTr3nETh-gptF8w@mail.gmail.com>
	<CAK-xaQY+8bRFDbhtWBLTSUUKMBH51DhHqKgbNf7meALKq36Waw@mail.gmail.com>


On 12/9/24 10:47, Andrea Gelmini wrote:
> 
> 
> Il Lun 9 Dic 2024, 10:19 Michael Harris <[email protected]
> <mailto:[email protected]>> ha scritto:
> 
> 
>     Is this already being looked into?
> 
> 
> Funny, i guess it's the same reason I see randomly complain of WhatsApp
> web interface, on Chrome, since I switched to XFS. It says something
> like "no more space on disk" and logout, with more than 300GB available.
> 

If I understand the fallocate issue correctly, it essentially ignores
the offset, so "fallocate -o 0 -l LENGTH" fails if

    LENGTH + CURRENT_LENGTH > FREE_SPACE

But if you have 300GB available, that'd mean you have a file that's
close to that size already. But is that likely for WhatsApp?

> Anyway, just a stupid hint, I would try to write to XFS mailing list.
> There you can reach XFS maintainers of Red Hat and the usual historical
> developers, of course!!!
> 

Yes, I think that's a better place to report this. I don't think we're
doing anything particularly weird / wrong with fallocate().


regards

-- 
Tomas Vondra

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