linux-kernel - Re: [PATCH 6.16 000/627] 6.16.1-rc1 review

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Message-ID: <CA+G9fYuEb7Y__CVHxZ8VkWGqfA4imWzXsBhPdn05GhOandg0Yw@mail.gmail.com>
Date: Wed, 13 Aug 2025 20:01:51 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: stable@...r.kernel.org, patches@...ts.linux.dev, 
	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org, 
	akpm@...ux-foundation.org, linux@...ck-us.net, shuah@...nel.org, 
	patches@...nelci.org, lkft-triage@...ts.linaro.org, pavel@...x.de, 
	jonathanh@...dia.com, f.fainelli@...il.com, sudipm.mukherjee@...il.com, 
	srw@...dewatkins.net, rwarsow@....de, conor@...nel.org, hargar@...rosoft.com, 
	broonie@...nel.org, achill@...ill.org, qemu-devel@...gnu.org, 
	Alex Bennée <alex.bennee@...aro.org>, 
	Arnd Bergmann <arnd@...db.de>, Dan Carpenter <dan.carpenter@...aro.org>, 
	Anders Roxell <anders.roxell@...aro.org>, Ben Copeland <benjamin.copeland@...aro.org>, 
	LTP List <ltp@...ts.linux.it>, chrubis <chrubis@...e.cz>, Petr Vorel <pvorel@...e.cz>, 
	Ian Rogers <irogers@...gle.com>, linux-perf-users@...r.kernel.org, 
	Zhang Yi <yi.zhang@...weicloud.com>, Joseph Qi <jiangqi903@...il.com>, Jan Kara <jack@...e.cz>, 
	linux-fsdevel@...r.kernel.org, linux-ext4 <linux-ext4@...r.kernel.org>, 
	Zhang Yi <yi.zhang@...wei.com>, "Theodore Ts'o" <tytso@....edu>, Baokun Li <libaokun1@...wei.com>
Subject: Re: [PATCH 6.16 000/627] 6.16.1-rc1 review

Hi Greg,

> > 2)
> >
> > The following list of LTP syscalls failure noticed on qemu-arm64 with
> > stable-rc 6.16.1-rc1 with CONFIG_ARM64_64K_PAGES=y build configuration.
> >
> > Most failures report ENOSPC (28) or mkswap errors, which may be related
> > to disk space handling in the 64K page configuration on qemu-arm64.
> >
> > The issue is reproducible on multiple runs.
> >
> > * qemu-arm64, ltp-syscalls - 64K page size test failures list,
> >
> >   - fallocate04
> >   - fallocate05
> >   - fdatasync03
> >   - fsync01
> >   - fsync04
> >   - ioctl_fiemap01
> >   - swapoff01
> >   - swapoff02
> >   - swapon01
> >   - swapon02
> >   - swapon03
> >   - sync01
> >   - sync_file_range02
> >   - syncfs01
> >
> > Reproducibility:
> >  - 64K config above listed test fails
> >  - 4K config above listed test pass.
> >
> > Regression Analysis:
> > - New regression? yes
>
> Regression from 6.16?  Or just from 6.15.y?

Based on available data, the issue is not present in v6.16 or v6.15.

Anders, bisected this regression and found,

  ext4: correct the reserved credits for extent conversion
    [ Upstream commit 95ad8ee45cdbc321c135a2db895d48b374ef0f87 ]

Report lore link,

https://lore.kernel.org/stable/CA+G9fYtBnCSa2zkaCn-oZKYz8jz5FZj0HS7DjSfMeamq3AXqNg@mail.gmail.com/

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