search for: dev_attr_show

https://bugs.freedesktop.org/show_bug.cgi?id=34430 Summary: nouveau driver does not return VGA connector status breaking upower Product: xorg Version: unspecified Platform: x86-64 (AMD64) OS/Version: Linux (All) Status: NEW Severity: normal Priority: medium Component: Driver/nouveau

...() vdev->config->reset() : guest will not kick us through interrupt del_gendisk() device_del() kobject_del(): got stuck, sysfs entry ref count non zero sysfs_open_file(): user space process read /sys/block/vda/serial sysfs_get_active() : got sysfs entry ref count dev_attr_show() virtblk_serial_show() blk_execute_rq() : got stuck, interrupt is disabled request cannot be finished This patch fixes it by calling del_gendisk() before we disable guest's interrupt so that the request sent in virtblk_serial_show() will be fin...

...() vdev->config->reset() : guest will not kick us through interrupt del_gendisk() device_del() kobject_del(): got stuck, sysfs entry ref count non zero sysfs_open_file(): user space process read /sys/block/vda/serial sysfs_get_active() : got sysfs entry ref count dev_attr_show() virtblk_serial_show() blk_execute_rq() : got stuck, interrupt is disabled request cannot be finished This patch fixes it by calling del_gendisk() before we disable guest's interrupt so that the request sent in virtblk_serial_show() will be fin...

...() vdev->config->reset() : guest will not kick us through interrupt del_gendisk() device_del() kobject_del(): got stuck, sysfs entry ref count non zero sysfs_open_file(): user space process read /sys/block/vda/serial sysfs_get_active() : got sysfs entry ref count dev_attr_show() virtblk_serial_show() blk_execute_rq() : got stuck, interrupt is disabled request cannot be finished This patch fixes it by calling del_gendisk() before we disable guest's interrupt so that the request sent in virtblk_serial_show() will be fin...

...() vdev->config->reset() : guest will not kick us through interrupt del_gendisk() device_del() kobject_del(): got stuck, sysfs entry ref count non zero sysfs_open_file(): user space process read /sys/block/vda/serial sysfs_get_active() : got sysfs entry ref count dev_attr_show() virtblk_serial_show() blk_execute_rq() : got stuck, interrupt is disabled request cannot be finished This patch fixes it by calling del_gendisk() before we disable guest's interrupt so that the request sent in virtblk_serial_show() will be fin...

...__i2c_transfer+0x5c/0x80 [<ffffffff8136530a>] i2c_transfer+0x5a/0xa0 [<ffffffffa0055336>] nouveau_probe_i2c_addr+0x46/0x50 [nouveau] [<ffffffffa005769d>] nouveau_connector_detect+0xdd/0x2c0 [nouveau] [<ffffffff812b9dd1>] status_show+0x41/0x90 [<ffffffff812cfcfb>] dev_attr_show+0x1b/0x60 [<ffffffff810b1259>] ? __get_free_pages+0x9/0x40 [<ffffffff811548e4>] sysfs_read_file+0xa4/0x190 [<ffffffff810f5760>] vfs_read+0xa0/0x180 [<ffffffff810f5885>] sys_read+0x45/0xa0 [<ffffffff814df4a2>] system_call_fastpath+0x16/0x1b --- [4] nouveau 0000:0...

...: [<ffffffff816396e5>] __mutex_lock_slowpath+0xc5/0x1c0 > Feb 26 12:57:05 badboy kernel: [<ffffffff81638b4f>] mutex_lock+0x1f/0x2f > Feb 26 12:57:05 badboy kernel: [<ffffffff81449100>] manufacturer_show+0x20/0x50 > Feb 26 12:57:05 badboy kernel: [<ffffffff813f1c20>] dev_attr_show+0x20/0x60 > Feb 26 12:57:05 badboy kernel: [<ffffffff8125928a>] sysfs_read_file+0x9a/0x1a0 > Feb 26 12:57:05 badboy kernel: [<ffffffff811de43c>] vfs_read+0x9c/0x170 > Feb 26 12:57:05 badboy kernel: [<ffffffff811def8f>] SyS_read+0x7f/0xe0 > Feb 26 12:57:05 badboy kernel...

Hi All, I''m having a similar issue as Ian Tobin some weeks ago here: http://lists.xensource.com/archives/html/xen-users/2010-02/msg00645.html I''m using Debian Squeeze amd64, downloaded the experimental debian xen-amd64 kernel with pv_ops support. linux-headers-2.6.32-5-common-xen_2.6.32-13_amd64.deb linux-headers-2.6.32-5-xen-amd64_2.6.32-13_amd64.deb

When user hot-unplug a disk which is busy serving I/O, __blk_run_queue might be unable to drain all the requests. As a result, the blk_drain_queue() would loop forever and blk_cleanup_queue would not return. So hot-unplug will fail. This patch adds a callback in blk_drain_queue() for low lever driver to abort requests. Currently, this is useful for virtio-blk to do cleanup in hot-unplug. Cc:

When user hot-unplug a disk which is busy serving I/O, __blk_run_queue might be unable to drain all the requests. As a result, the blk_drain_queue() would loop forever and blk_cleanup_queue would not return. So hot-unplug will fail. This patch adds a callback in blk_drain_queue() for low lever driver to abort requests. Currently, this is useful for virtio-blk to do cleanup in hot-unplug. Cc:

This patch set fixes the race when hot-unplug stressed disk. Asias He (3): virtio-blk: Call del_gendisk() before disable guest kick virtio-blk: Reset device after blk_cleanup_queue() virtio-blk: Use block layer provided spinlock drivers/block/virtio_blk.c | 25 ++++++------------------- 1 file changed, 6 insertions(+), 19 deletions(-) -- 1.7.10.2

This patch set fixes the race when hot-unplug stressed disk. Asias He (3): virtio-blk: Call del_gendisk() before disable guest kick virtio-blk: Reset device after blk_cleanup_queue() virtio-blk: Use block layer provided spinlock drivers/block/virtio_blk.c | 25 ++++++------------------- 1 file changed, 6 insertions(+), 19 deletions(-) -- 1.7.10.2

...15.236257] blk_mq_run_hw_queue+0x14/0x16 [ 15.239477] blk_mq_sched_insert_request+0xd8/0x11f [ 15.243490] blk_execute_rq_nowait+0x78/0xd3 [ 15.246775] blk_execute_rq+0x68/0x9f [ 15.249864] virtblk_serial_show+0x79/0xd7 [ 15.253033] ? virtblk_cache_type_show+0x46/0x46 [ 15.256436] dev_attr_show+0x25/0x49 [ 15.259273] sysfs_kf_seq_show+0x7f/0xcf [ 15.262768] kernfs_seq_show+0x27/0x29 [ 15.265724] seq_read+0x177/0x333 [ 15.268372] kernfs_fop_read+0x3c/0x15d [ 15.271562] __vfs_read+0x26/0x9d [ 15.274213] ? fsnotify_perm+0x63/0x6f [ 15.276933] ? security_file_permission+0...

...15.236257] blk_mq_run_hw_queue+0x14/0x16 [ 15.239477] blk_mq_sched_insert_request+0xd8/0x11f [ 15.243490] blk_execute_rq_nowait+0x78/0xd3 [ 15.246775] blk_execute_rq+0x68/0x9f [ 15.249864] virtblk_serial_show+0x79/0xd7 [ 15.253033] ? virtblk_cache_type_show+0x46/0x46 [ 15.256436] dev_attr_show+0x25/0x49 [ 15.259273] sysfs_kf_seq_show+0x7f/0xcf [ 15.262768] kernfs_seq_show+0x27/0x29 [ 15.265724] seq_read+0x177/0x333 [ 15.268372] kernfs_fop_read+0x3c/0x15d [ 15.271562] __vfs_read+0x26/0x9d [ 15.274213] ? fsnotify_perm+0x63/0x6f [ 15.276933] ? security_file_permission+0...