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  1. 12 Apr, 2011 6 commits
  3. 11 Apr, 2011 1 commit
    • NeilBrown's avatar
      block: splice plug list to local context · 109b8129
      NeilBrown authored 
      If the request_fn ends up blocking, we could be re-entering
the plug flush. Since the list is protected by explicitly
not allowing schedule events, this isn't a terribly good idea.

Additionally, it can cause us to recurse. As request_fn called by
__blk_run_queue is allowed to 'schedule()' (after dropping the queue
lock of course), it is possible to get a recursive call:

 schedule -> blk_flush_plug -> __blk_finish_plug -> flush_plug_list
      -> __blk_run_queue -> request_fn -> schedule

We must make sure that the second schedule does not call into
blk_flush_plug again.  So instead of leaving the list of requests on
blk_plug->list, move them to a separate list leaving blk_plug->list
empty.
Signed-off-by: default avatarJens Axboe <jaxboe@fusionio.com>
      109b8129
  5. 10 Apr, 2011 1 commit
  7. 09 Apr, 2011 3 commits
  9. 08 Apr, 2011 4 commits
  11. 07 Apr, 2011 19 commits
  13. 06 Apr, 2011 6 commits
    • Hans Rosenfeld's avatar
      x86-32, fpu: Fix FPU exception handling on non-SSE systems · f994d99c
      Hans Rosenfeld authored 
      On 32bit systems without SSE (that is, they use FSAVE/FRSTOR for FPU
context switches), FPU exceptions in user mode cause Oopses, BUGs,
recursive faults and other nasty things:

fpu exception: 0000 [#1]
last sysfs file: /sys/power/state
Modules linked in: psmouse evdev pcspkr serio_raw [last unloaded: scsi_wait_scan]

Pid: 1638, comm: fxsave-32-excep Not tainted 2.6.35-07798-g58a992b9-dirty #633 VP3-596B-DD/VT82C597
EIP: 0060:[<c1003527>] EFLAGS: 00010202 CPU: 0
EIP is at math_error+0x1b4/0x1c8
EAX: 00000003 EBX: cf9be7e0 ECX: 00000000 EDX: cf9c5c00
ESI: cf9d9fb4 EDI: c1372db3 EBP: 00000010 ESP: cf9d9f1c
DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068
Process fxsave-32-excep (pid: 1638, ti=cf9d8000 task=cf9be7e0 task.ti=cf9d8000)
Stack:
00000000 00000301 00000004 00000000 00000000 cf9d3000 cf9da8f0 00000001
<0> 00000004 cf9b6b60 c1019a6b c1019a79 00000020 00000242 000001b6 cf9c5380
<0> cf806b40 cf791880 00000000 00000282 00000282 c108a213 00000020 cf9c5380
Call Trace:
[<c1019a6b>] ? need_resched+0x11/0x1a
[<c1019a79>] ? should_resched+0x5/0x1f
[<c108a213>] ? do_sys_open+0xbd/0xc7
[<c108a213>] ? do_sys_open+0xbd/0xc7
[<c100353b>] ? do_coprocessor_error+0x0/0x11
[<c12d5965>] ? error_code+0x65/0x70
Code: a8 20 74 30 c7 44 24 0c 06 00 03 00 8d 54 24 04 89 d9 b8 08 00 00 00 e8 9b 6d 02 00 eb 16 8b 93 5c 02 00 00 eb 05 e9 04 ff ff ff <9b> dd 32 9b e9 16 ff ff ff 81 c4 84 00 00 00 5b 5e 5f 5d c3 c6
EIP: [<c1003527>] math_error+0x1b4/0x1c8 SS:ESP 0068:cf9d9f1c

This usually continues in slight variations until the system is reset.

This bug was introduced by commit 58a992b9:
	x86-32, fpu: Rewrite fpu_save_init()
Signed-off-by: default avatarHans Rosenfeld <hans.rosenfeld@amd.com>
Link: http://lkml.kernel.org/r/1302106003-366952-1-git-send-email-hans.rosenfeld@amd.comSigned-off-by: default avatarH. Peter Anvin <hpa@zytor.com>
      f994d99c
    • Arjan Mels's avatar
      staging: usbip: bugfix for isochronous packets and optimization · 28276a28
      Arjan Mels authored 
      For isochronous packets the actual_length is the sum of the actual
length of each of the packets, however between the packets might be
padding, so it is not sufficient to just send the first actual_length
bytes of the buffer. To fix this and simultanesouly optimize the
bandwidth the content of the isochronous packets are send without the
padding, the padding is restored on the receiving end.
Signed-off-by: default avatarArjan Mels <arjan.mels@gmx.net>
Cc: Takahiro Hirofuchi <hirofuchi@users.sourceforge.net>
Cc: Max Vozeler <max@vozeler.com>
Cc: stable <stable@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      28276a28
    • Arjan Mels's avatar
      staging: usbip: bugfix add number of packets for isochronous frames · 1325f85f
      Arjan Mels authored 
      The number_of_packets was not transmitted for RET_SUBMIT packets. The
linux client used the stored number_of_packet from the submitted
request. The windows userland client does not do this however and needs
to know the number_of_packets to determine the size of the transmission.
Signed-off-by: default avatarArjan Mels <arjan.mels@gmx.net>
Cc: Takahiro Hirofuchi <hirofuchi@users.sourceforge.net>
Cc: Max Vozeler <max@vozeler.com>
Cc: stable <stable@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      1325f85f
    • Arjan Mels's avatar
      staging: usbip: bugfixes related to kthread conversion · d2dd0b07
      Arjan Mels authored 
      When doing a usb port reset do a queued reset instead to prevent a
deadlock: the reset will cause the driver to unbind, causing the
usb_driver_lock_for_reset to stall.
Signed-off-by: default avatarArjan Mels <arjan.mels@gmx.net>
Cc: Takahiro Hirofuchi <hirofuchi@users.sourceforge.net>
Cc: Max Vozeler <max@vozeler.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: stable <stable@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      d2dd0b07
    • Arjan Mels's avatar
      staging: usbip: fix shutdown problems. · 2f8c4c54
      Arjan Mels authored 
      When shuting down the tcp_rx and tcp_tx threads first check if they are
not closed already (maybe because an error caused them to return).
Signed-off-by: default avatarArjan Mels <arjan.mels@gmx.net>
Cc: Takahiro Hirofuchi <hirofuchi@users.sourceforge.net>
Cc: Max Vozeler <max@vozeler.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: stable <stable@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      2f8c4c54
    • Haiyang Zhang's avatar
      staging: hv: Fix GARP not sent after Quick Migration · c996edcf
      Haiyang Zhang authored 
      After Quick Migration, the network is not immediately operational in the
current context when receiving RNDIS_STATUS_MEDIA_CONNECT event. So, I added
another netif_notify_peers() into a scheduled work, otherwise GARP packet will
not be sent after quick migration, and cause network disconnection.

Thanks to Mike Surcouf <mike@surcouf.co.uk> for reporting the bug and
testing the patch.
Reported-by: default avatarMike Surcouf <mike@surcouf.co.uk>
Tested-by: default avatarMike Surcouf <mike@surcouf.co.uk>
Signed-off-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarHank Janssen <hjanssen@microsoft.com>
Signed-off-by: default avatarAbhishek Kane <v-abkane@microsoft.com>
Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Cc: stable <stable@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      c996edcf
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