linux-kernel - Re: [PATCH v2 19/25] netfs: Speed up buffered reading

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Message-ID: <20240929185501.GA218692@unreal>
Date: Sun, 29 Sep 2024 21:55:01 +0300
From: Leon Romanovsky <leon@...nel.org>
To: Eduard Zingerman <eddyz87@...il.com>,
	David Howells <dhowells@...hat.com>
Cc: Christian Brauner <brauner@...nel.org>,
	Manu Bretelle <chantr4@...il.com>, asmadeus@...ewreck.org,
	ceph-devel@...r.kernel.org, christian@...uner.io, ericvh@...nel.org,
	hsiangkao@...ux.alibaba.com, idryomov@...il.com, jlayton@...nel.org,
	linux-afs@...ts.infradead.org, linux-cifs@...r.kernel.org,
	linux-erofs@...ts.ozlabs.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-nfs@...r.kernel.org, marc.dionne@...istor.com,
	netdev@...r.kernel.org, netfs@...ts.linux.dev, pc@...guebit.com,
	smfrench@...il.com, sprasad@...rosoft.com, tom@...pey.com,
	v9fs@...ts.linux.dev, willy@...radead.org
Subject: Re: [PATCH v2 19/25] netfs: Speed up buffered reading

On Sun, Sep 29, 2024 at 02:37:44AM -0700, Eduard Zingerman wrote:
> On Sun, 2024-09-29 at 10:12 +0100, David Howells wrote:
> > Can you try the attached?  I've also put it on my branch here:
> > 
> > https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/log/?h=netfs-fixes
> 
> Used your branch:
> fc22830c5a07 ("9p: Don't revert the I/O iterator after reading")
> 
> dmesg is here:
> https://gist.github.com/eddyz87/4cd50c2cf01323641999dc386e2d41eb
> 
> Still see null-ptr-deref.

I tried it too and I can confirm that the issue is still there.

Thanks

> 
> [...]
>