/* * linux/fs/nfs/sysctl.c * * Sysctl interface to NFS parameters */ #include #include #include #include #include #include #include static struct ctl_table_header *nfs_callback_sysctl_table; static struct ctl_table nfs_cb_sysctls[] = { { .procname = "nfs_mountpoint_timeout", .data = &nfs_mountpoint_expiry_timeout, .maxlen = sizeof(nfs_mountpoint_expiry_timeout), .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, { .procname = "nfs_congestion_kb", .data = &nfs_congestion_kb, .maxlen = sizeof(nfs_congestion_kb), .mode = 0644, .proc_handler = proc_dointvec, }, { } }; static struct ctl_table nfs_cb_sysctl_dir[] = { { .procname = "nfs", .mode = 0555, .child = nfs_cb_sysctls, }, { } }; static struct ctl_table nfs_cb_sysctl_root[] = { { .procname = "fs", .mode = 0555, .child = nfs_cb_sysctl_dir, }, { } }; int nfs_register_sysctl(void) { nfs_callback_sysctl_table = register_sysctl_table(nfs_cb_sysctl_root); if (nfs_callback_sysctl_table == NULL) return -ENOMEM; return 0; } void nfs_unregister_sysctl(void) { unregister_sysctl_table(nfs_callback_sysctl_table); nfs_callback_sysctl_table = NULL; } ack net-next plumbingsTobias Klauser
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path: root/drivers/usb/host/fotg210-hcd.c
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authorDexuan Cui <decui@microsoft.com>2017-01-28 11:46:02 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-31 10:59:48 +0100
commit433e19cf33d34bb6751c874a9c00980552fe508c (patch)
treece6547ef2987fbb289fa28f03536328a42781651 /drivers/usb/host/fotg210-hcd.c
parent191e885a2e130e639bb0c8ee350d7047294f2ce6 (diff)
Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()
Commit a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") added the proper mb(), but removed the test "prev_write_sz < pending_sz" when making the signal decision. As a result, the guest can signal the host unnecessarily, and then the host can throttle the guest because the host thinks the guest is buggy or malicious; finally the user running stress test can perceive intermittent freeze of the guest. This patch brings back the test, and properly handles the in-place consumption APIs used by NetVSC (see get_next_pkt_raw(), put_pkt_raw() and commit_rd_index()). Fixes: a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") Signed-off-by: Dexuan Cui <decui@microsoft.com> Reported-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Tested-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: <stable@vger.kernel.org> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/fotg210-hcd.c')