Re: [systemd-devel] Slow firmware timeouts again (Re: [3.11 regression?] iwlwifi firmware takes two minutes to load)
On Fri, Aug 2, 2013 at 6:28 PM, Zbigniew Jędrzejewski-Szmek zbys...@in.waw.pl wrote: On Fri, Aug 02, 2013 at 09:04:44AM -0700, Andy Lutomirski wrote: CONFIG_FW_LOADER_USER_HELPER=y Do you need this? Unsetting this should help. This option enables / disables the invocation of user-helper (e.g. udev) for loading firmware files as a fallback after the direct file loading in kernel fails. The user-mode helper is no longer required unless you have a special firmware file that resides in a non-standard path. On recent systems, if the kernel configures CONFIG_FW_LOADER_USER_HELPER=y and a firmware is not found by the kernel, the kernel will issue a request which is ignored by userspace and will block in that for 60 seconds. Udev is no longer in the game of firmware loading, not even as a fallback, it will just completely ignore all kernel firmware class events. The source code in udev to handle firmware requests is disabled by default, currently still kept around for old kernels without the in-kernel firmware loader, but it will be deleted in the near future. Any issues with firmware timeouts should be addressed in the kernel by disabling CONFIG_FW_LOADER_USER_HELPER or by removing the fallback code from the in-kernel loader. Kay ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] Slow firmware timeouts again (Re: [3.11 regression?] iwlwifi firmware takes two minutes to load)
On Mon, Aug 5, 2013 at 4:18 AM, Kay Sievers k...@vrfy.org wrote: On Fri, Aug 2, 2013 at 6:28 PM, Zbigniew Jędrzejewski-Szmek zbys...@in.waw.pl wrote: On Fri, Aug 02, 2013 at 09:04:44AM -0700, Andy Lutomirski wrote: CONFIG_FW_LOADER_USER_HELPER=y Do you need this? Unsetting this should help. This option enables / disables the invocation of user-helper (e.g. udev) for loading firmware files as a fallback after the direct file loading in kernel fails. The user-mode helper is no longer required unless you have a special firmware file that resides in a non-standard path. On recent systems, if the kernel configures CONFIG_FW_LOADER_USER_HELPER=y and a firmware is not found by the kernel, the kernel will issue a request which is ignored by userspace and will block in that for 60 seconds. Udev is no longer in the game of firmware loading, not even as a fallback, it will just completely ignore all kernel firmware class events. The source code in udev to handle firmware requests is disabled by default, currently still kept around for old kernels without the in-kernel firmware loader, but it will be deleted in the near future. Any chance you'd consider a less regression-inducing path to getting rid of this feature? For example, have udev warn and immediate fail firmware loading requests for a few releases, then just warn, then drop support? Meanwhile, CONFIG_FW_LOADER_USER_HELPER is still default y (!), so udev has introduced massive bootup delays into the default configuration with no warning. It might be nice to change it to default n, get rid of everything that selects it, and possible even rename it to something with LEGACY or OBSOLETE in the name so that make oldconfig will prompt. --Andy Any issues with firmware timeouts should be addressed in the kernel by disabling CONFIG_FW_LOADER_USER_HELPER or by removing the fallback code from the in-kernel loader. Kay -- Andy Lutomirski AMA Capital Management, LLC ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
[systemd-devel] Slow firmware timeouts again (Re: [3.11 regression?] iwlwifi firmware takes two minutes to load)
[cc: linux-kernel, linux-hotplug, and systemd-devel. This is 3.11-rc3+] On Fri, Aug 2, 2013 at 12:38 AM, Johannes Berg johan...@sipsolutions.net wrote: On Thu, 2013-08-01 at 21:38 -0700, Andy Lutomirski wrote: At boot, I get: [ 12.537108] iwlwifi :03:00.0: irq 51 for MSI/MSI-X ... [ 132.676781] iwlwifi :03:00.0: loaded firmware version 9.221.4.1 build 25532 op_mode iwldvm This sounds familiar, but wasn't it fixed awhile ago? It wasn't exactly fixed and it's really more of a userspace problem - we probably request firmware version 8, and then it takes 30 seconds to time out for each of 8,7,6,5, after which the next request for 4 is successful. Why's it requesting those firmwares? They don't seem to exist on intellinuxwireless.org. I have: CONFIG_FW_LOADER=y # CONFIG_FIRMWARE_IN_KERNEL is not set CONFIG_EXTRA_FIRMWARE= CONFIG_FW_LOADER_USER_HELPER=y I don't know why your userspace isn't behaving differently though. johannes -- Andy Lutomirski AMA Capital Management, LLC ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] Slow firmware timeouts again (Re: [3.11 regression?] iwlwifi firmware takes two minutes to load)
On Fri, Aug 2, 2013 at 9:21 AM, Johannes Berg johan...@sipsolutions.net wrote: On Fri, 2013-08-02 at 09:04 -0700, Andy Lutomirski wrote: It wasn't exactly fixed and it's really more of a userspace problem - we probably request firmware version 8, and then it takes 30 seconds to time out for each of 8,7,6,5, after which the next request for 4 is successful. Why's it requesting those firmwares? They don't seem to exist on intellinuxwireless.org. Well for one you've never even mentioned what device you have, and then also it's not requesting 8/7 only 6,5,4 -- I guess the timeout was increased to 60 seconds (or I'm remembering wrong and it always was? I thought it was 30s) I have an Ultimate-N 6300 (rev 35). It's requesting at least versions 6 and 5 (I saw them in udevadm monitor). It looks like the g2a and g2b variants have -5 and -6 versions, but 6000-4 appears to be the only relevant version for my hardware. ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] Slow firmware timeouts again (Re: [3.11 regression?] iwlwifi firmware takes two minutes to load)
On Fri, Aug 02, 2013 at 09:04:44AM -0700, Andy Lutomirski wrote: CONFIG_FW_LOADER_USER_HELPER=y Do you need this? Unsetting this should help. This option enables / disables the invocation of user-helper (e.g. udev) for loading firmware files as a fallback after the direct file loading in kernel fails. The user-mode helper is no longer required unless you have a special firmware file that resides in a non-standard path. Zbyszek -- they are not broken. they are refucktored -- alxchk ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
