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SubjectRe: [PATCH v2] serial: 8250: convert to threaded IRQ
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?

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