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From: Mathias Nyman <>
To: Suwan Kim <>
Subject: Re: [PATCH v2] usb: host: xhci: Support running urb giveback in tasklet context
Date: Wed, 8 May 2019 15:04:33 +0300	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <20190507160219.GB2427@localhost.localdomain>

On 7.5.2019 19.02, Suwan Kim wrote:
> On Mon, Apr 01, 2019 at 11:16:11PM +0900, Suwan Kim wrote:
>> Patch "USB: HCD: support giveback of URB in tasklet context"[1]
>> introduced giveback of urb in tasklet context. [1] This patch was
>> applied to ehci but not xhci. [2] This patch significantly reduces
>> the hard irq time of xhci. Especially for uvc driver, the hard irq
>> including the uvc completion function runs quite long but applying
>> this patch reduces the hard irq time of xhci.
> I sent this patch a month ago but got no answer.
> Is there any feedback for this?
> Please let me know if there are any faults or it needs more tests.

I'll add this to a internal tree first, and let it sit there for a few
weeks, trying to catch possible bugs this change could expose.


  reply	other threads:[~2019-05-08 12:02 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-01 14:16 Suwan Kim
2019-04-01 14:43 ` Alan Stern
2019-04-04 12:18   ` Suwan Kim
2019-04-04 20:54     ` Alan Stern
2019-04-08 14:26       ` Suwan Kim
2019-05-07 16:02 ` Suwan Kim
2019-05-08 12:04   ` Mathias Nyman [this message]
2019-05-08 14:40     ` Suwan Kim

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