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

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Message-ID: <Zvr1PVRpC33aaUdt@telecaster.dhcp.thefacebook.com>
Date: Mon, 30 Sep 2024 12:00:13 -0700
From: Omar Sandoval <osandov@...ndov.com>
To: David Howells <dhowells@...hat.com>
Cc: Eduard Zingerman <eddyz87@...il.com>, Leon Romanovsky <leon@...nel.org>,
	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 Mon, Sep 30, 2024 at 07:35:02PM +0100, David Howells wrote:
> Eduard Zingerman <eddyz87@...il.com> wrote:
> 
> > Are there any hacks possible to printout tracelog before complete boot
> > somehow?
> 
> You could try setting CONFIG_NETFS_DEBUG=y.  That'll print some stuff to
> dmesg.
> 
> David

I hit this in drgn's VM test setup, too, and just sent a patch that
fixed it for me and Manu:
https://lore.kernel.org/linux-fsdevel/cbaf141ba6c0e2e209717d02746584072844841a.1727722269.git.osandov@fb.com/

Thanks,
Omar