Bug 604151 - Kdump initrd should have only firmware for the drivers packed in initrd
Kdump initrd should have only firmware for the drivers packed in initrd
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: kexec-tools (Show other bugs)
All Linux
high Severity medium
: rc
: ---
Assigned To: Cong Wang
Boris Ranto
Depends On:
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Reported: 2010-06-15 10:10 EDT by Vivek Goyal
Modified: 2013-09-29 22:17 EDT (History)
6 users (show)

See Also:
Fixed In Version: kexec-tools-2.0.0-90.el6
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2010-11-10 16:00:17 EST
Type: ---
Regression: ---
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
proposed patch (777 bytes, patch)
2010-06-18 05:05 EDT, Cong Wang
no flags Details | Diff

  None (edit)
Description Vivek Goyal 2010-06-15 10:10:44 EDT
Description of problem:

Currently we seem to be packing all the firmware blobs in kdump initrd by default and this led to increase in size of kdump initrd from 3.3 MB to 8 MB. If we can modify "mkdumprd" to include only firmware for the drivers packed into initrd, it can reduce the size of initrd and reduce the memory requirement for kdump kernel. 

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Comment 3 RHEL Product and Program Management 2010-06-15 10:33:11 EDT
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release.  Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release.  This request is not yet committed for
Comment 4 Cong Wang 2010-06-17 05:18:15 EDT
It seems that using udev is the only way to know which driver needs which firmware.
Comment 5 Neil Horman 2010-06-17 07:24:46 EDT
modinfo can tell you all the firmware files that a given module can request
Comment 6 Cong Wang 2010-06-18 04:47:31 EDT
(In reply to comment #5)
> modinfo can tell you all the firmware files that a given module can request    

Ah, got it. thanks.
Comment 7 Cong Wang 2010-06-18 05:05:59 EDT
Created attachment 425051 [details]
proposed patch

Please try if this patch addresses your concern.
Comment 8 Cong Wang 2010-06-22 03:04:43 EDT
On my system, this reduces kdump initrd from 9.1M to 4.4M, more than 50%!
Comment 15 releng-rhel@redhat.com 2010-11-10 16:00:17 EST
Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.

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