Greg KH posted three emails titled State of the Linux Driver Core Subsystem, State of the Linux USB Subsystem, and State of the Linux PCI Subsystem, noting that for each there were no known regressions then going on to list which patches were bound for the upcoming 2.6.24 kernel. Greg pointed out that there were a large number of open bugs against the USB subsystem, "yeah, there are way too many there, I've been really slack in trying to work through them. If anyone wants to help out, feel free :)" He continued:
"Note, there are over 100 patches in the USB queue, so I might have missed a few things in reviewing them by hand right now. If I failed to describe your patch that is already in the queue, and you feel it is important for everyone to know about, please feel free to add to the above list. I did not purposefully mean to exclude anything, merely try to summarize things"
From: Greg KH <gregkh@...> Subject: State of the Linux Driver Core Subsystem for 2.6.23-rc8 Date: Sep 26, 4:59 pm 2007 Here's a summary of the current state of the Linux Driver core subsystem, as of 2.6.23-rc8. If the information in here is incorrect, or anyone knows of any outstanding issues not listed here, please let me know. List of outstanding regressions from 2.6.22: - none known. List of outstanding regressions from older kernel versions: - none known. There are no currently open Driver core or sysfs bugs in bugzilla. Future patches that are currently in my quilt tree (as found at http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/ ) for the Driver core subsystem are as follows. All of these will be submitted for inclusion into 2.6.24, except as noted. The diffstat of these patches is included at the bottom of this message for those that are interested. - HOWTO ja_JP updates - metric boatload of changes and tweaks to sysfs from Tejun. These clean up the internal usage and implementation of sysfs, and split sysfs from the kobject model a lot, fixing a lot of problems along the way. I can't thank him enough for this work. - cleaned up the usage of struct subsystem some more by removing some functions that are not needed, or only used by the driver core. Details on the api changes are below - cleaned up the usage of the kobject->name field and removed it entirely. This saves us some size on every kobject which really adds up on those s390 31 bit boxes with 20,000 different block devices. - uevent environment variable handling has been made simpler, and now hopefully, almost impossible to get wrong. Previously we were forcing every subsystem to open-code a lot of this logic. Thanks to Kay for this work. - global list of sysdev_drivers is removed, as no one was using it at all. - the number of legacy ptys can now be dynamically specified on the kernel command line, allowing people who refuse to fix their old applications to be able to still run on newer distros that want to limit this number at build time. - dmi sysfs code cleanups and fixes - block devices are moved from /sys/block to /sys/class/block. This patch has been hanging around for almost a year now, and hopefully we have worked out all of the kinks and userspace boot breakages. If anyone has any problems with this, please let me and Kay know about it. I'm hesitant to include it in 2.6.24 as it has recently changed and needs more testing. Maybe it will go into 2.6.25. Oh, udev has been able to handle this for over a year, so there should not be any problems with distros that are still supported. It can also be turned off with the CONFIG_SYSFS_DEPRECATED build option for older distros. - new debugfs functions for people who like hex numbers - platform devices now have the "platform:" alias added to their modalias to fix the recursive modprobe loops that Red Hat, OLPC, SuSE, and Debian have reported in the current code. - some struct class_device to struct device conversions were done for video and some various char drivers. More of these are on the way. - cdev kobject name cleanups. The kobject name of a cdev does not do anything, so it should not be set. - firmware collision fix between i2c and i2c-dev. - uevent files for bus and driver have been added. SuSE has shipped this for quite some time now. - if CONFIG_HOTPLUG is not enabled, some more space is saved in the uevent code. - the path to the uevent helper program (traditionally /sbin/hotplug) can be specified in the kernel config. This keeps the kernel from having to call a program that is not present 300+ times before init starts up, speeding up boot time in theory. New driver core api changes for 2.6.24: - debugfs_create_x8(), debugfs_create_x16(), and debugfs_create_x32() have been added - struct kobject.name field has been removed. Use kobject_set_name() and kobject_name() to set and get the name. - uevent callbacks in the driver core and for kobjects have been changed from: int (*uevent)(struct device *dev, char **envp, int num_envp, char *buffer, int buffer_size); to: int (*uevent)(struct device *dev, struct kobj_uevent_env *env); and struct kobj_uevent_env has been created to make it simpler to create environment variables for uevents. - struct platform_device.id has changed from an u32 to an int. - the following functions have been removed either entirely or from the global namespace: get_bus() put_bus() kset_set_kset_s() subsys_get() subsys_put() subsys_set_kset() subsystem_init() All documentation and in-kernel users have been cleaned up. There really wasn't many, if any users of these calls. No known at this time, changes to the sysfs userspace visable structure will happen in 2.6.24. thanks, greg k-h ---------------------------- Diffstat of the current driver-2.6 quilt queue: Documentation/ja_JP/HOWTO | 84 - Documentation/kernel-parameters.txt | 4 Documentation/kobject.txt | 21 arch/i386/kernel/traps.c | 1 arch/ia64/sn/kernel/tiocx.c | 3 arch/powerpc/kernel/of_device.c | 37 arch/powerpc/kernel/vio.c | 16 arch/powerpc/platforms/ps3/system-bus.c | 9 arch/x86_64/kernel/traps.c | 1 block/bsg.c | 5 block/elevator.c | 2 block/genhd.c | 446 ++--- block/ll_rw_blk.c | 6 drivers/acpi/bus.c | 2 drivers/acpi/scan.c | 16 drivers/acpi/video.c | 4 drivers/amba/bus.c | 9 drivers/base/Kconfig | 8 drivers/base/base.h | 2 drivers/base/bus.c | 116 - drivers/base/class.c | 52 drivers/base/core.c | 124 - drivers/base/firmware_class.c | 14 drivers/base/memory.c | 3 drivers/base/platform.c | 28 drivers/base/power/power.h | 6 drivers/base/power/resume.c | 2 drivers/base/power/suspend.c | 2 drivers/base/sys.c | 73 drivers/block/aoe/aoeblk.c | 51 drivers/block/nbd.c | 15 drivers/char/Kconfig | 10 drivers/char/Makefile | 1 drivers/char/dsp56k.c | 4 drivers/char/ip2/ip2main.c | 12 drivers/char/ipmi/ipmi_devintf.c | 6 drivers/char/istallion.c | 8 drivers/char/lp.c | 5 drivers/char/nozomi.c | 2348 ++++++++++++++++++++++++++++ drivers/char/pcmcia/cm4000_cs.c | 5 drivers/char/pcmcia/cm4040_cs.c | 5 drivers/char/pty.c | 9 drivers/char/raw.c | 5 drivers/char/snsc.c | 3 drivers/char/stallion.c | 7 drivers/char/tipar.c | 6 drivers/char/viotape.c | 10 drivers/cpufreq/cpufreq.c | 2 drivers/edac/edac_mc_sysfs.c | 3 drivers/eisa/eisa-bus.c | 9 drivers/firewire/fw-device.c | 11 drivers/firmware/dmi-id.c | 60 drivers/i2c/i2c-core.c | 8 drivers/ide/ide-probe.c | 2 drivers/ide/ide.c | 15 drivers/ieee1394/nodemgr.c | 17 drivers/infiniband/core/sysfs.c | 9 drivers/input/input.c | 62 drivers/input/misc/pcspkr.c | 1 drivers/input/serio/serio.c | 11 drivers/md/dm.c | 2 drivers/md/md.c | 11 drivers/media/dvb/dvb-core/dvbdev.c | 5 drivers/media/video/pvrusb2/pvrusb2-sysfs.c | 4 drivers/misc/tifm_core.c | 9 drivers/mmc/core/bus.c | 11 drivers/net/ibmveth.c | 2 drivers/pci/hotplug.c | 28 drivers/pci/hotplug/pci_hotplug_core.c | 60 drivers/pci/hotplug/rpadlpar_sysfs.c | 6 drivers/pci/pci-driver.c | 3 drivers/pci/pci.h | 3 drivers/pci/setup-irq.c | 2 drivers/pcmcia/cs.c | 10 drivers/pcmcia/ds.c | 26 drivers/pcmcia/pxa2xx_mainstone.c | 2 drivers/pcmcia/pxa2xx_sharpsl.c | 2 drivers/power/power_supply.h | 3 drivers/power/power_supply_sysfs.c | 17 drivers/s390/cio/ccwgroup.c | 3 drivers/s390/cio/device.c | 25 drivers/s390/crypto/ap_bus.c | 14 drivers/scsi/scsi_sysfs.c | 9 drivers/spi/spi.c | 7 drivers/usb/core/devio.c | 6 drivers/usb/core/driver.c | 29 drivers/usb/core/message.c | 28 drivers/video/output.c | 29 drivers/w1/w1.c | 18 fs/block_dev.c | 8 fs/debugfs/file.c | 36 fs/dlm/lockspace.c | 2 fs/gfs2/locking/dlm/sysfs.c | 2 fs/gfs2/sys.c | 2 fs/ocfs2/cluster/masklog.c | 3 fs/partitions/check.c | 328 +-- fs/sysfs/bin.c | 30 fs/sysfs/dir.c | 806 ++------- fs/sysfs/file.c | 262 ++- fs/sysfs/group.c | 2 fs/sysfs/inode.c | 109 - fs/sysfs/mount.c | 18 fs/sysfs/symlink.c | 26 fs/sysfs/sysfs.h | 191 +- include/asm-powerpc/of_device.h | 2 include/linux/debugfs.h | 27 include/linux/device.h | 17 include/linux/genhd.h | 29 include/linux/init.h | 1 include/linux/kobject.h | 86 - include/linux/platform_device.h | 7 include/linux/sysfs.h | 168 -- include/linux/tty.h | 1 include/linux/video_output.h | 4 init/do_mounts.c | 108 - init/main.c | 9 lib/Makefile | 3 lib/kobject.c | 195 +- lib/kobject_uevent.c | 216 +- net/atm/atm_sysfs.c | 7 net/bridge/br_sysfs_br.c | 2 net/core/net-sysfs.c | 14 net/wireless/sysfs.c | 3 sound/aoa/soundbus/core.c | 33 124 files changed, 4226 insertions(+), 2721 deletions(-) -
From: Greg KH <gregkh@...> Subject: State of the Linux USB Subsystem for 2.6.23-rc8 Date: Sep 26, 4:59 pm 2007 Here's a summary of the current state of the Linux USB subsystem, as of 2.6.23-rc8 If the information in here is incorrect, or anyone knows of any outstanding issues not listed here, please let me know. List of outstanding regressions from 2.6.22: - none known. List of outstanding regressions from older kernel versions: - none known. If interested, the list of all currently open USB bugs can be seen at: http://bugzilla.kernel.org/showdependencytree.cgi?id=5089&hide_resolved=1 Yeah, there are way too many there, I've been really slack in trying to work through them. If anyone wants to help out, feel free :) Future patches that are currently in my quilt tree (as found at http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/ ) for the USB subsystem are as follows. All of these will be submitted for inclusion into 2.6.24, except as noted. The diffstat of these patches is included at the bottom of this message for those that are interested. - usbmon fixups and cleanups and documentation update - usblp cleanups and tweaks - sisusb2vga lindenting and other janitorial cleanups - urb->status reworks in the host controller drivers to make the removal of that field in the future much easier. - usb gadget driver cleanups - new drivers/usb/serial/ch341.c driver - kobil_sct driver reworking - ueagle driver updates - new device ids added - new unusual devs storage quirks added - removal of all of the USB_QUIRK_NO_AUTOSUSPEND entries as they no longer make any sense. - USB authorization changes which allow userspace to disable a USB device from being able to be used by the kernel, if it so desires. This is part of the slow merge of the USB Wireless work. - lots of small tweaks and bugfixes and reworks in the usb-serial drivers due to some tty reworks and auditing. - the usbserial port is now shown in sysfs for the individual usb-serial bus devices.a - lots of rework of the internal apis for the USB host controllers to make things simpler and easier (hopefully.) - suspend tweaks and reworks to make USB devices behave better - other minor fixes in the USB core and drivers. New USB driver api changes for 2.6.24: usb_urb_dir_in() and usb_urb_dir_out() have been added to test the direction of an urb. Note, there are over 100 patches in the USB queue, so I might have missed a few things in reviewing them by hand right now. If I failed to describe your patch that is already in the queue, and you feel it is important for everyone to know about, please feel free to add to the above list. I did not purposefully mean to exclude anything, merely try to summarize things. thanks, greg k-h ---------------------------- Diffstat of the current usb-2.6 quilt queue: Documentation/usb/authorization.txt | 92 + Documentation/usb/usb-serial.txt | 11 Documentation/usb/usbmon.txt | 9 drivers/usb/Makefile | 24 drivers/usb/atm/cxacru.c | 43 drivers/usb/atm/speedtch.c | 3 drivers/usb/atm/ueagle-atm.c | 1398 +++++++++++++++++++++++------ drivers/usb/class/usblp.c | 120 +- drivers/usb/core/config.c | 24 drivers/usb/core/devio.c | 77 - drivers/usb/core/driver.c | 31 drivers/usb/core/endpoint.c | 1 drivers/usb/core/generic.c | 30 drivers/usb/core/hcd.c | 908 ++++++++++-------- drivers/usb/core/hcd.h | 38 drivers/usb/core/hub.c | 273 ++++- drivers/usb/core/message.c | 52 - drivers/usb/core/quirks.c | 81 - drivers/usb/core/sysfs.c | 39 drivers/usb/core/urb.c | 114 +- drivers/usb/core/usb.c | 40 drivers/usb/core/usb.h | 7 drivers/usb/gadget/amd5536udc.c | 7 drivers/usb/gadget/dummy_hcd.c | 97 -- drivers/usb/gadget/ether.c | 147 +-- drivers/usb/gadget/file_storage.c | 249 ++--- drivers/usb/gadget/fsl_usb2_udc.c | 9 drivers/usb/gadget/gmidi.c | 80 - drivers/usb/gadget/inode.c | 44 drivers/usb/gadget/omap_udc.c | 10 drivers/usb/gadget/serial.c | 166 +-- drivers/usb/gadget/zero.c | 239 ++-- drivers/usb/host/ehci-hcd.c | 14 drivers/usb/host/ehci-pci.c | 5 drivers/usb/host/ehci-ps3.c | 2 drivers/usb/host/ehci-q.c | 115 +- drivers/usb/host/ehci-sched.c | 47 drivers/usb/host/isp116x-hcd.c | 65 - drivers/usb/host/ohci-dbg.c | 8 drivers/usb/host/ohci-hcd.c | 213 +++- drivers/usb/host/ohci-mem.c | 1 drivers/usb/host/ohci-pci.c | 22 drivers/usb/host/ohci-q.c | 195 +--- drivers/usb/host/ohci.h | 26 drivers/usb/host/r8a66597-hcd.c | 177 +-- drivers/usb/host/sl811-hcd.c | 90 - drivers/usb/host/u132-hcd.c | 370 ++++--- drivers/usb/host/uhci-debug.c | 4 drivers/usb/host/uhci-hcd.h | 16 drivers/usb/host/uhci-q.c | 72 - drivers/usb/misc/Kconfig | 9 drivers/usb/misc/Makefile | 1 drivers/usb/misc/adutux.c | 3 drivers/usb/misc/berry_charge.c | 7 drivers/usb/misc/ftdi-elan.c | 8 drivers/usb/misc/gotemp.c | 292 ++++++ drivers/usb/misc/sisusbvga/sisusb.c | 198 ---- drivers/usb/misc/sisusbvga/sisusb.h | 130 +- drivers/usb/misc/sisusbvga/sisusb_con.c | 60 - drivers/usb/misc/sisusbvga/sisusb_init.c | 354 ++----- drivers/usb/misc/sisusbvga/sisusb_init.h | 1363 ++++++++++++++-------------- drivers/usb/misc/sisusbvga/sisusb_struct.h | 164 +-- drivers/usb/mon/mon_bin.c | 102 +- drivers/usb/mon/mon_main.c | 31 drivers/usb/mon/mon_text.c | 80 - drivers/usb/mon/usb_mon.h | 2 drivers/usb/serial/Kconfig | 10 drivers/usb/serial/Makefile | 1 drivers/usb/serial/ark3116.c | 5 drivers/usb/serial/bus.c | 16 drivers/usb/serial/ch341.c | 362 +++++++ drivers/usb/serial/cp2101.c | 3 drivers/usb/serial/ftdi_sio.c | 5 drivers/usb/serial/ipaq.c | 2 drivers/usb/serial/kl5kusb105.c | 28 drivers/usb/serial/kobil_sct.c | 146 +-- drivers/usb/serial/mct_u232.c | 28 drivers/usb/serial/oti6858.c | 2 drivers/usb/serial/pl2303.c | 1 drivers/usb/serial/pl2303.h | 1 drivers/usb/serial/safe_serial.c | 11 drivers/usb/serial/usb-serial.c | 11 drivers/usb/storage/initializers.c | 14 drivers/usb/storage/initializers.h | 3 drivers/usb/storage/shuttle_usbat.c | 3 drivers/usb/storage/unusual_devs.h | 20 drivers/usb/usb-skeleton.c | 1 include/linux/usb.h | 79 + include/linux/usb/quirks.h | 7 include/linux/usb_gadget.h | 95 + 90 files changed, 5685 insertions(+), 3878 deletions(-) -
From: Greg KH <gregkh@...> Subject: State of the Linux PCI Subsystem for 2.6.23-rc8 Date: Sep 26, 5:00 pm 2007 Here's a summary of the current state of the Linux PCI subsystem, as of 2.6.23-rc8. If the information in here is incorrect, or anyone knows of any outstanding issues not listed here, please let me know. List of outstanding regressions from 2.6.22: - none known. List of outstanding regressions from older kernel versions: - none known. If interested, the list of all currently open PCI bugs can be seen at: http://bugzilla.kernel.org/showdependencytree.cgi?id=5829&hide_resolved=1 Future patches that are currently in my quilt tree (as found at http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/ ) for the PCI subsystem are as follows. All of these will be submitted for inclusion into 2.6.24, except as noted. The diffstat of these patches is included at the bottom of this message for those that are interested. - various pci quirks for different devices - pci hotplug driver kthread conversion - pci hotplug bugfixes - pci express hotplug tweaks and fixes - minor bugfixes and cleanups - MSI documentation update - pci bridge device rework. Note, this was reported to break Andrew's x86-64 box, but he lost the picture he took of the oops. Others reported that it worked just fine on their boxes. I'm still a little hesitant of sending this to 2.6.24 until I can track down what happened here. There are no PCI api changes scheduled for 2.6.24. thanks, greg k-h ---------------------------- Diffstat of the current pci-2.6 quilt queue: Documentation/DMA-API.txt | 3 Documentation/MSI-HOWTO.txt | 69 ------------ arch/i386/kernel/pci-dma.c | 3 arch/i386/kernel/reboot_fixups.c | 6 + arch/i386/pci/common.c | 10 + arch/i386/pci/fixup.c | 47 ++++++++ arch/i386/pci/irq.c | 39 +++++++ arch/x86_64/kernel/pci-dma.c | 1 drivers/pci/bus.c | 17 ++- drivers/pci/hotplug/cpqphp_core.c | 2 drivers/pci/hotplug/cpqphp_ctrl.c | 74 ++++--------- drivers/pci/hotplug/ibmphp_hpc.c | 57 ++-------- drivers/pci/hotplug/pciehp_core.c | 24 +--- drivers/pci/hotplug/pciehp_ctrl.c | 20 +-- drivers/pci/hotplug/pciehp_hpc.c | 209 ++++++++++---------------------------- drivers/pci/hotplug/pciehp_pci.c | 24 ++-- drivers/pci/pci-driver.c | 3 drivers/pci/pci.c | 5 drivers/pci/pci.h | 2 drivers/pci/pcie/Kconfig | 9 - drivers/pci/probe.c | 82 +++++++------- drivers/pci/quirks.c | 43 ------- drivers/pci/remove.c | 6 - include/linux/pci.h | 4 include/linux/pci_ids.h | 3 include/linux/pci_regs.h | 6 - lib/swiotlb.c | 1 27 files changed, 316 insertions(+), 453 deletions(-) -
USB bugs list is high, not the patch queue
No, I pointed out that the list of open USB bugs is high, not the USB patch queue.
thanks
I obviously need to read closer. I updated the article per your comment, thanks for the feedback.
we could need an automatic
we could need an automatic lexical highlighter that helps remove any confusion =)
anyway, thanks for the work Jeremy, i dont think there is any other project that
makes such a fine summary (kernel-level wise)
What can't that guy do?
Seriously, great work Greg. I know it's more than you out there, but you do a lot to keep the kernel up-to-date. :)
submitted a bug report to
submitted a bug report to Greg like 3 years ago in time of 2.6.0-test kernels, which caused major hotplug code rewrite :)
hehehe
hehehe
Competence
This guy is Rambo. So refreshing to see competence in action instead of more of the scheduler fiasco.
So scheduler developers are
So scheduler developers are incompetent?