From: Greg KH <gregkh@linuxfoundation.org>
To: Denys Zagorui <dzagorui@cisco.com>
Cc: jslaby@suse.com, linux-serial@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] serial: 8250: convert to threaded IRQ
Date: Tue, 28 Nov 2017 15:26:27 +0100 [thread overview]
Message-ID: <20171128142627.GB17797@kroah.com> (raw)
In-Reply-To: <20171115124002.32039-1-dzagorui@cisco.com>
On Wed, Nov 15, 2017 at 02:40:02PM +0200, Denys Zagorui wrote:
> During using virtualization it is common to see
> many "too much work for irq*" messages.
>
> There are fixes proposed erlier:
> - e7328ae1848966181a7ac47e8ae6cddbd2cf55f3 (serial:
> 8250, increase PASS_LIMIT)
> - f4f653e9875e573860e783fecbebde284a8626f5 (serial:
> 8250, disable "too much work" messages
>
> First one doesn't help now, last one was reverted
> (12de375ec493ab1767d4a07dde823e63ae5edc21) in fact
> it doesn't fix anything. So procesing interrupts in
> kthread give us an opportunity to perform rescheduling
> periodically.
>
> Cc: Jiri Slaby <jslaby@suse.com>
> Signed-off-by: Denys Zagorui <dzagorui@cisco.com>
> ---
> drivers/tty/serial/8250/8250_core.c | 28 +++++++++++++++++++++-------
> 1 file changed, 21 insertions(+), 7 deletions(-)
Always say what changed from v1 below the --- line, otherwise we have no
idea.
v3?
prev parent reply other threads:[~2017-11-28 14:26 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-15 12:40 [PATCH v2] serial: 8250: convert to threaded IRQ Denys Zagorui
2017-11-28 14:26 ` Greg KH [this message]
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