- 02 Dec, 2008 9 commits
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Davide Libenzi authored
It has been thought that the per-user file descriptors limit would also limit the resources that a normal user can request via the epoll interface. Vegard Nossum reported a very simple program (a modified version attached) that can make a normal user to request a pretty large amount of kernel memory, well within the its maximum number of fds. To solve such problem, default limits are now imposed, and /proc based configuration has been introduced. A new directory has been created, named /proc/sys/fs/epoll/ and inside there, there are two configuration points: max_user_instances = Maximum number of devices - per user max_user_watches = Maximum number of "watched" fds - per user The current default for "max_user_watches" limits the memory used by epoll to store "watches", to 1/32 of the amount of the low RAM. As example, a 256MB 32bit machine, will have "max_user_watches" set to roughly 90000. That should be enough to not break existing heavy epoll users. The default value for "max_user_instances" is set to 128, that should be enough too. This also changes the userspace, because a new error code can now come out from EPOLL_CTL_ADD (-ENOSPC). The EMFILE from epoll_create() was already listed, so that should be ok. [akpm@linux-foundation.org: use get_current_user()] Signed-off-by:
Davide Libenzi <davidel@xmailserver.org> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: <stable@kernel.org> Cc: Cyrill Gorcunov <gorcunov@gmail.com> Reported-by:
Vegard Nossum <vegardno@ifi.uio.no> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Stefano Babic authored
According to the manual the "tdfOnExit" flag must be set on the last byte we want to send. The PSC controller holds SS low until the flag is set. However, the flag was set always on the last byte of the FIFO, independently if it is the last byte of the transfer. This generates spurious toggling of the SS signals that breaks the protocol of some peripherals. Fix. Signed-off-by:
Stefano Babic <sbabic@denx.de> Acked-by:
Grant Likely <grant.likely@secretlab.ca> Signed-off-by:
David Brownell <dbrownell@users.sourceforge.net> Signed-off-by:
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Wolfgang Ocker authored
I saw a kernel oops in spidev_remove() when a spidev device was registered and I unloaded the SPI master driver: Unable to handle kernel paging request for data at address 0x00000004 Faulting instruction address: 0xc01c0c50 Oops: Kernel access of bad area, sig: 11 [#1] CDSPR Modules linked in: spi_ppc4xx(-) NIP: c01c0c50 LR: c01bf9e4 CTR: c01c0c34 REGS: cec89c30 TRAP: 0300 Not tainted (2.6.27.3izt) MSR: 00021000 <ME> CR: 24000228 XER: 20000007 DEAR: 00000004, ESR: 00800000 TASK = cf889040[2070] 'rmmod' THREAD: cec88000 GPR00: 00000000 cec89ce0 cf889040 cec8e000 00000004 cec8e000 ffffffff 00000000 GPR08: 0000001c c0336380 00000000 c01c0c34 00000001 1001a338 100e0000 100df49c GPR16: 100b54c0 100df49c 100ddd20 100f05a8 100b5340 100efd68 00000000 00000000 GPR24: 100ec008 100f0428 c0327788 c0327794 cec8e0ac cec8e000 c0336380 00000000 NIP [c01c0c50] spidev_remove+0x1c/0xe4 LR [c01bf9e4] spi_drv_remove+0x2c/0x3c Call Trace: [cec89d00] [c01bf9e4] spi_drv_remove+0x2c/0x3c [cec89d10] [c01859a0] __device_release_driver+0x78/0xb4 [cec89d20] [c0185ab0] device_release_driver+0x28/0x44 [cec89d40] [c0184be8] bus_remove_device+0xac/0xd8 [cec89d60] [c0183094] device_del+0x100/0x194 [cec89d80] [c0183140] device_unregister+0x18/0x30 [cec89da0] [c01bf30c] __unregister+0x20/0x34 [cec89db0] [c0182778] device_for_each_child+0x38/0x74 [cec89de0] [c01bf2d0] spi_unregister_master+0x28/0x44 [cec89e00] [c01bfeac] spi_bitbang_stop+0x1c/0x58 [cec89e20] [d908a5e0] spi_ppc4xx_of_remove+0x24/0x7c [spi_ppc4xx] [...] IMHO a call to spi_set_drvdata() is missing in spidev_probe(). The patch below helped. Signed-off-by:
Wolfgang Ocker <weo@reccoware.de> Signed-off-by:
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roel kluin authored
Use __initdata for data, not __init. Signed-off-by:
Roel Kluin <roel.kluin@gmail.com> Signed-off-by:
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Henrik Rydberg authored
make use of the new dmi device loading support to automatically load the applesmc driver based on the dmi_match table. Signed-off-by:
Henrik Rydberg <rydberg@euromail.se> Cc: Nicolas Boichat <nicolas@boichat.ch> Signed-off-by:
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Takashi Iwai authored
The netmos_9xx5_combo type assumes that PCI SSID provides always the correct value for the number of parallel and serial ports, but there are indeed broken devices with wrong numbers, which may result in Oops. This patch simply adds the check of the array range. Reference: Novell bnc#447067 https://bugzilla.novell.com/show_bug.cgi?id=447067Signed-off-by:
Takashi Iwai <tiwai@suse.de> Cc: <stable@kernel.org> Signed-off-by:
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KAMEZAWA Hiroyuki authored
Fixes for memcg/memory hotplug. While memory hotplug allocate/free memmap, page_cgroup doesn't free page_cgroup at OFFLINE when page_cgroup is allocated via bootomem. (Because freeing bootmem requires special care.) Then, if page_cgroup is allocated by bootmem and memmap is freed/allocated by memory hotplug, page_cgroup->page == page is no longer true. But current MEM_ONLINE handler doesn't check it and update page_cgroup->page if it's not necessary to allocate page_cgroup. (This was not found because memmap is not freed if SPARSEMEM_VMEMMAP is y.) And I noticed that MEM_ONLINE can be called against "part of section". So, freeing page_cgroup at CANCEL_ONLINE will cause trouble. (freeing used page_cgroup) Don't rollback at CANCEL. One more, current memory hotplug notifier is stopped by slub because it sets NOTIFY_STOP_MASK to return vaule. So, page_cgroup's callback never be called. (low priority than slub now.) I think this slub's behavior is not intentional(BUG). and fixes it. Another way to be considered about page_cgroup allocation: - free page_cgroup at OFFLINE even if it's from bootmem and remove specieal handler. But it requires more changes. Addresses http://bugzilla.kernel.org/show_bug.cgi?id=12041Signed-off-by:KAMEZAWA Hiruyoki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Pavel Emelyanov <xemul@openvz.org> Tested-by:
Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by:
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Nick Piggin authored
Jim Radford has reported that the vmap subsystem rewrite was sometimes causing his VIVT ARM system to behave strangely (seemed like going into infinite loops trying to fault in pages to userspace). We determined that the problem was most likely due to a cache aliasing issue. flush_cache_vunmap was only being called at the moment the page tables were to be taken down, however with lazy unmapping, this can happen after the page has subsequently been freed and allocated for something else. The dangling alias may still have dirty data attached to it. The fix for this problem is to do the cache flushing when the caller has called vunmap -- it would be a bug for them to write anything else to the mapping at that point. That appeared to solve Jim's problems. Reported-by:
Jim Radford <radford@blackbean.org> Signed-off-by:
Nick Piggin <npiggin@suse.de> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2Linus Torvalds authored
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2: ocfs2: fix regression in ocfs2_read_blocks_sync() ocfs2: fix return value set in init_dlmfs_fs() ocfs2: Small documentation update ocfs2: fix wake_up in unlock_ast ocfs2: initialize stack_user lvbptr ocfs2: comments typo fix
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- 01 Dec, 2008 31 commits
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Mark Fasheh authored
We're panicing in ocfs2_read_blocks_sync() if a jbd-managed buffer is seen. At first glance, this seems ok but in reality it can happen. My test case was to just run 'exorcist'. A struct inode is being pushed out of memory but is then re-read at a later time, before the buffer has been checkpointed by jbd. This causes a BUG to be hit in ocfs2_read_blocks_sync(). Reviewed-by:
Joel Becker <joel.becker@oracle.com> Signed-off-by:
Mark Fasheh <mfasheh@suse.com>
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Coly Li authored
In init_dlmfs_fs(), if calling kmem_cache_create() failed, the code will use return value from calling bdi_init(). The correct behavior should be set status as -ENOMEM before going to "bail:". Signed-off-by:
Coly Li <coyli@suse.de> Acked-by:
Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by:
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Mark Fasheh authored
Remove some features from the "not-supported" list that are actually supported now. Signed-off-by: -
David Teigland authored
In ocfs2_unlock_ast(), call wake_up() on lockres before releasing the spin lock on it. As soon as the spin lock is released, the lockres can be freed. Signed-off-by:
David Teigland <teigland@redhat.com> Signed-off-by:
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David Teigland authored
The locking_state dump, ocfs2_dlm_seq_show, reads the lvb on locks where it has not yet been initialized by a lock call. Signed-off-by:
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Coly Li authored
This patch fixes two typos in comments of ocfs2. Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-devLinus Torvalds authored
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev: libata: blacklist Seagate drives which time out FLUSH_CACHE when used with NCQ [libata] pata_rb532_cf: fix signature of the xfer function [libata] pata_rb532_cf: fix and rename register definitions ata_piix: add borked Tecra M4 to broken suspend list
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git://git.kernel.org/pub/scm/linux/kernel/git/roland/infinibandLinus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: IB/mlx4: Fix MTT leakage in resize CQ IB/ehca: Fix problem with generated flush work completions IB/ehca: Change misleading error message on memory hotplug mlx4_core: Save/restore default port IB capability mask
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Tejun Heo authored
Some recent Seagate harddrives have firmware bug which causes FLUSH CACHE to timeout under certain circumstances if NCQ is being used. This can be worked around by disabling NCQ and fixed by updating the firmware. Implement ATA_HORKAGE_FIRMWARE_UPDATE and blacklist these devices. The wiki page has been updated to contain information on this issue. http://ata.wiki.kernel.org/index.php/Known_issuesSigned-off-by:
Tejun Heo <tj@kernel.org> Signed-off-by:
Jeff Garzik <jgarzik@redhat.com>
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Phil Sutter authored
Per definition, this function should return the number of bytes consumed. As the original parameter "buflen" is being decremented inside the read/write loop, save it in "retlen" at the beginning. Signed-off-by:
Phil Sutter <n0-1@freewrt.org> Acked-by:
Sergei Shtyltov <sshtylyov@ru.mvista.com> Acked-by:
Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Acked-by:
Florian Fainelli <florian@openwrt.org> Signed-off-by:
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Phil Sutter authored
The original standalone driver uses a custom address for the error register. Use it in pata_rb532_cf, too. Rename two register definitions: - The address offset 0x0800 in fact is the ATA base, not ATA command address. - The offset 0x0C00 is not a regular ATA data address, but a buffered one allowing 4-byte IO. Signed-off-by:
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Tejun Heo authored
Tecra M4 sometimes forget what it is and reports bogus data via DMI which makes the machine evade broken suspend matching and thus fail suspend/resume. This patch updates piix_broken_suspend() such that it can match such case. As the borked DMI data is a bit generic, matching many entries to make the match more specific is necessary. As the usual DMI matching is limited to four entries, this patch uses hard coded manual matching. This is reported by Alexandru Romanescu. Signed-off-by:
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Roland Dreier authored
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Jack Morgenstein authored
When resizing a CQ, MTTs associated with the old CQE buffer were not freed. As a result, if any app used resize CQ repeatedly, all MTTs were eventually exhausted, which led to all memory registration operations failing until the driver is reloaded. Once the RESIZE_CQ command returns successfully from FW, FW no longer accesses the old CQ buffer, so it is safe to deallocate the MTT entries used by the old CQ buffer. Finally, if the RESIZE_CQ command fails, the MTTs allocated for the new CQEs buffer also need to be de-allocated. This fixes <https://bugs.openfabrics.org/show_bug.cgi?id=1416>. Signed-off-by:
Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by:
Roland Dreier <rolandd@cisco.com>
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Stefan Roscher authored
This fix enables ehca device driver to generate flush work completions even if the application doesn't request completions for all work requests. The current implementation of ehca will generate flush work completions for the wrong work requests if an application uses non signaled work completions. Signed-off-by:
Stefan Roscher <stefan.roscher@de.ibm.com> Signed-off-by:
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Joachim Fenkes authored
The error message printed when the eHCA driver prevents memory hotplug is misleading -- the user might think that hot-removing the lhca, hotplugging memory, then hot-adding the lhca again will work, but it actually doesn't. Signed-off-by:
Joachim Fenkes <fenkes@de.ibm.com> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6Linus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: ieee1394: sbp2: fix race condition in state change ieee1394: fix list corruption (reported at module removal) firewire: fw-sbp2: another iPod mini quirk entry ieee1394: sbp2: another iPod mini quirk entry
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git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hidLinus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: HID: Apple ALU wireless keyboards are bluetooth devices HID: remove setup mutex, fix possible deadlock HID: add USB ID for another dual gameron adapter HID: unignore mouse on unibody macbooks HID: fix blacklist entries for greenasia/pantherlord
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Kevin Hao authored
We alloc a fake tty in usb serial console setup function. we should init the tty's kref otherwise we will face WARN_ON after following invoke of tty_port_tty_set --> tty_kref_get. Signed-off-by:
Kevin Hao <kexin.hao@windriver.com> Signed-off-by:
Alan Cox <alan@redhat.com> Signed-off-by:
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Will Newton authored
When no console is configured tty_open tries to call kref_get on a NULL pointer, return ENODEV instead. Signed-off-by:
Will Newton <will.newton@gmail.com> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: USB: serial: add more Onda device ids to option driver USB: usb-storage: unusual_devs entry for Nikon D2H USB: storage: unusual_devs entry for Mio C520-GPS USB: fsl_usb2_udc: Report disconnect before unbinding USB: fsl_qe_udc: Report disconnect before unbinding USB: fix SB600 USB subsystem hang bug Revert "USB: improve ehci_watchdog's side effect in CPU power management"
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git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpcLinus Torvalds authored
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: powerpc: Fix build for 32-bit SMP configs
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Johannes Weiner authored
The zone's rotation statistics must not be accessed without the corresponding LRU lock held. Fix an unprotected write in shrink_active_list(). Acked-by:
Rik van Riel <riel@redhat.com> Reviewed-by:
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by:
Johannes Weiner <hannes@saeurebad.de> Signed-off-by:
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Linus Torvalds authored
This reverts commit e669dae6, since it is incomplete, and clashes with fuller patches and the sparc 32/64 unification effort. Requested-by:
David Miller <davem@davemloft.net> Acked-by:
Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by:
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Greg Kroah-Hartman authored
Thanks to Domenico Riccio for pointing these out. Cc: Domenico Riccio <domenico.riccio@gmail.com> Signed-off-by:Greg Kroah-Hartman <gregkh@suse.de>
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Tobias Kunze Briseño authored
This patch adds an unusual_devs entry for the Nikon D2H camera. From: Tobias Kunze Briseño <t@fictive.com>, Signed-off-by:
Alan Stern <stern@rowland.harvard.edu> Signed-off-by:
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Alan Stern authored
This patch (as1176) adds an unusual_devs entry for the Mio C520 GPS unit. Other devices also based on the Mitac hardware use the same USB interface firmware, so the Vendor and Product names are generalized. This fixes Bugzilla #11583. Signed-off-by:
Tamas Kerecsen <kerecsen@bigfoot.com> Signed-off-by:
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Anton Vorontsov authored
Gadgets disable endpoints in their disconnect callbacks, so we must call disconnect before unbinding. The patch fixes following badness: root@b1:~# insmod fsl_usb2_udc.ko Freescale High-Speed USB SOC Device Controller driver (Apr 20, 2007) root@b1:~# insmod g_ether.ko g_ether gadget: using random self ethernet address g_ether gadget: using random host ethernet address usb0: MAC 26:07:ba:c0:44:33 usb0: HOST MAC 96:81:0c:05:4d:e3 g_ether gadget: Ethernet Gadget, version: Memorial Day 2008 g_ether gadget: g_ether ready fsl-usb2-udc: bind to driver g_ether g_ether gadget: high speed config #1: CDC Ethernet (ECM) root@b1:~# rmmod g_ether.ko ------------[ cut here ]------------ Badness at drivers/usb/gadget/composite.c:871 [...] NIP [e10c3454] composite_unbind+0x24/0x15c [g_ether] LR [e10aa454] usb_gadget_unregister_driver+0x13c/0x164 [fsl_usb2_udc] Call Trace: [df145e80] [ffffff94] 0xffffff94 (unreliable) [df145eb0] [e10aa454] usb_gadget_unregister_driver+0x13c/0x164 [fsl_usb2_udc] [df145ed0] [e10c4c40] usb_composite_unregister+0x3c/0x4c [g_ether] [df145ee0] [c006bcc0] sys_delete_module+0x130/0x19c [df145f40] [c00142d8] ret_from_syscall+0x0/0x38 [...] unregistered gadget driver 'g_ether' Signed-off-by:
Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by:
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Anton Vorontsov authored
Gadgets disable endpoints in their disconnect callbacks, so we must call disconnect before unbinding. This also fixes muram memory leak, since we free muram in the qe_ep_disable(). But mainly the patch fixes following badness: root@b1:~# insmod fsl_qe_udc.ko fsl_qe_udc: Freescale QE/CPM USB Device Controller driver, 1.0 fsl_qe_udc e01006c0.usb: QE USB controller initialized as device root@b1:~# insmod g_ether.ko g_ether gadget: using random self ethernet address g_ether gadget: using random host ethernet address usb0: MAC be:2d:3c:fa:be:f0 usb0: HOST MAC 62:b8:6a:df:38:66 g_ether gadget: Ethernet Gadget, version: Memorial Day 2008 g_ether gadget: g_ether ready fsl_qe_udc e01006c0.usb: fsl_qe_udc bind to driver g_ether g_ether gadget: high speed config #1: CDC Ethernet (ECM) root@b1:~# rmmod g_ether.ko ------------[ cut here ]------------ Badness at drivers/usb/gadget/composite.c:871 [...] NIP [d10c1374] composite_unbind+0x24/0x15c [g_ether] LR [d10a82f4] usb_gadget_unregister_driver+0x128/0x168 [fsl_qe_udc] Call Trace: [cfb93e80] [cfb1f3a0] 0xcfb1f3a0 (unreliable) [cfb93eb0] [d10a82f4] usb_gadget_unregister_driver+0x128/0x168 [fsl_qe_udc] [cfb93ed0] [d10c2a3c] usb_composite_unregister+0x3c/0x4c [g_ether] [cfb93ee0] [c006bde0] sys_delete_module+0x130/0x19c [cfb93f40] [c00142d8] ret_from_syscall+0x0/0x38 [...] fsl_qe_udc e01006c0.usb: unregistered gadget driver 'g_ether' Signed-off-by:
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Shane Huang authored
This patch is required for all AMD SB600 revisions to avoid USB subsystem hang symptom. The USB subsystem hang symptom is observed when the system has multiple USB devices connected to it. In some cases a USB hub may be required to observe this symptom. Reported in bugzilla as #11599, the similar patch for SB700 old revision is: commit b09bc6cbReported-by:
raffaele <ralfconn@tele2.it> Tested-by:
Roman Mamedov <roman@rm.pp.ru> Signed-off-by:
Shane Huang <shane.huang@amd.com> Cc: stable <stable@kernel.org> Signed-off-by:
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Greg Kroah-Hartman authored
This reverts commit f0d781d5. It was the wrong thing to do, and does not really do what it said it did. Cc: Yi Yang <yi.y.yang@intel.com> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Alan Stern <stern@rowland.harvard.edu> Signed-off-by:
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