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From: Takashi Iwai <tiwai@suse.de>
To: linux-kernel@vger.kernel.org
Cc: Prarit Bhargava <prarit@redhat.com>,
	Ming Lei <ming.lei@canonical.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	x86@kernel.org, amd64-microcode@amd64.org
Subject: [PATCH v2 0/3] Add request_firmware_direct() for microcode loader
Date: Mon, 11 Nov 2013 16:21:15 +0100	[thread overview]
Message-ID: <1384183278-19787-1-git-send-email-tiwai@suse.de> (raw)

Hi,

this is a revised patch series to introduce request_firmware_direct()
helper for avoiding the lengthy udev issue on microcode loader.
The original problem was stated in Prarit's post:
   https://lkml.org/lkml/2013/10/28/221

In short, microcode loader probes non-existing firmware files (which
are cases with every new chip), and each probe takes 60 seconds,
resulting in too long time until completed.

This solution is simply avoiding the udev fallback in
request_firmware() explicitly for drivers like microcode.

 [PATCH v2 1/3] firmware: Introduce request_firmware_direct()
 [PATCH v2 2/3] microcode: Use request_firmware_direct()
 [PATCH v2 3/3] firmware: Avoid bogus fallback warning

Of course, this doesn't mean to throw away further optimizations like
Prarit's patch.  It can be implemented in parallel with this.


v1->v2: Rebased on linux-next, add a fix for a bogus warning message


thanks,

Takashi

             reply	other threads:[~2013-11-11 15:21 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-11-11 15:21 Takashi Iwai [this message]
2013-11-11 15:21 ` [PATCH v2 1/3] firmware: Introduce request_firmware_direct() Takashi Iwai
2013-11-11 15:34   ` Borislav Petkov
2013-11-11 17:30     ` Takashi Iwai
2013-11-11 19:47       ` Borislav Petkov
2013-11-11 20:05       ` Prarit Bhargava
2013-11-12  2:11       ` Ming Lei
2013-11-11 15:21 ` [PATCH v2 2/3] microcode: Use request_firmware_direct() Takashi Iwai
2013-11-11 15:21 ` [PATCH v2 3/3] firmware: Avoid bogus fallback warning Takashi Iwai
2013-11-12  1:40   ` Ming Lei
2013-11-12  6:26     ` Takashi Iwai

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