From: Oliver Neukum <oneukum@suse.com>
To: Alan Stern <stern@rowland.harvard.edu>, David Wang <00107082@163.com>
Cc: mathias.nyman@intel.com, gregkh@linuxfoundation.org,
oneukum@suse.com, linux-usb@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/2] USB: core: add a memory pool to urb for host-controller private data
Date: Wed, 14 May 2025 13:27:19 +0200 [thread overview]
Message-ID: <29cc1ccb-4922-43fe-8d63-bc8333cc6049@suse.com> (raw)
In-Reply-To: <8c963ad0-a38f-4627-be11-80ccb669d006@rowland.harvard.edu>
On 13.05.25 16:25, Alan Stern wrote:
> Instead of having an URB keep ownership of its extra memory after it
> completes, xhci-hcd can put the memory area onto a free list. Then
> memory areas on the free list can be reused with almost no overhead when
> URBs are enqueued later on.
The number of URBs in flight is basically unlimited.
When would you shrink the number of cached privates?
That would seem to be the basic question if you do
not link this with URBs.
Regards
Oliver
next prev parent reply other threads:[~2025-05-14 11:27 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-12 15:07 [RFC] USB: core/xhci: add a buffer in urb for host controller private data David Wang
2025-05-12 15:34 ` Alan Stern
2025-05-12 16:19 ` David Wang
2025-05-13 5:54 ` [PATCH 1/2] USB: core: add a memory pool to urb for host-controller " David Wang
2025-05-13 8:11 ` Oliver Neukum
2025-05-13 8:23 ` David Wang
2025-05-13 8:46 ` Oliver Neukum
2025-05-13 8:53 ` David Wang
2025-05-13 9:49 ` David Wang
2025-05-13 11:02 ` Oliver Neukum
2025-05-13 11:12 ` David Wang
2025-05-13 5:55 ` [PATCH 2/2] USB: xhci: use urb hcpriv mempool for " David Wang
2025-05-13 8:21 ` Oliver Neukum
2025-05-13 8:31 ` David Wang
2025-05-13 9:00 ` Oliver Neukum
2025-05-13 9:27 ` [RFC] USB: core/xhci: add a buffer in urb for host controller " Mathias Nyman
2025-05-13 9:41 ` David Wang
2025-05-13 11:38 ` [PATCH v2 1/2] USB: core: add a memory pool to urb for host-controller " David Wang
2025-05-13 14:25 ` Alan Stern
2025-05-13 14:41 ` David Wang
2025-05-13 15:37 ` Alan Stern
2025-05-13 16:35 ` David Wang
2025-05-13 18:21 ` Alan Stern
2025-05-13 18:48 ` David Wang
2025-05-13 19:46 ` Alan Stern
2025-05-14 11:27 ` Oliver Neukum [this message]
2025-05-14 6:44 ` David Wang
2025-05-14 7:29 ` Greg KH
2025-05-14 8:50 ` David Wang
2025-05-14 9:34 ` Oliver Neukum
2025-05-17 9:09 ` David Wang
2025-05-14 11:23 ` Oliver Neukum
2025-05-14 11:51 ` David Wang
2025-05-14 12:03 ` Oliver Neukum
2025-05-14 12:14 ` David Wang
2025-05-16 17:13 ` David Wang
2025-05-13 11:38 ` [PATCH v2 2/2] USB: xhci: use urb hcpriv mempool for " David Wang
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