search for: simple_read_from_buffer

An embedded and charset-unspecified text was scrubbed... Name: ocfs2-use-simple-read-from-buffer.patch Url: http://oss.oracle.com/pipermail/ocfs2-devel/attachments/20080601/8e47b072/attachment.pl

These patches address issues in the kernel part of xenoprof: * Ill-advised use of on_each_cpu() can lead to sleep with interrupts disabled. * Race conditions in active_domains code. * Cleanup of active_domains code. Comments welcome. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

...- while (p) { - struct cfq_data *__cfqd; - - __cfqd = rb_entry(p, struct cfq_data, group_node); - - ret += snprintf(page + ret, PAGE_SIZE - ret, " %s %d\n", - __cfqd->cfqdd->queue->kobj.parent->name, - __cfqd->ioprio); - - p = rb_next(p); - } - ret = simple_read_from_buffer(userbuf, nbytes, ppos, page, ret); - -out: - free_page((unsigned long)page); - return ret; +#define READ_FUNCTION(__FUNC, __VAR, __DEF_MSG) \ +static ssize_t __FUNC(struct cgroup *cont, struct cftype *cft, \ + struct file *file, char __user *userbuf, \ + size_t nbytes, loff_t *ppos) \ +{...

...- while (p) { - struct cfq_data *__cfqd; - - __cfqd = rb_entry(p, struct cfq_data, group_node); - - ret += snprintf(page + ret, PAGE_SIZE - ret, " %s %d\n", - __cfqd->cfqdd->queue->kobj.parent->name, - __cfqd->ioprio); - - p = rb_next(p); - } - ret = simple_read_from_buffer(userbuf, nbytes, ppos, page, ret); - -out: - free_page((unsigned long)page); - return ret; +#define READ_FUNCTION(__FUNC, __VAR, __DEF_MSG) \ +static ssize_t __FUNC(struct cgroup *cont, struct cftype *cft, \ + struct file *file, char __user *userbuf, \ + size_t nbytes, loff_t *ppos) \ +{...

Added two debugfs entries... one to dump o2hb livenodes and the other to dump osb. $ cat /sys/kernel/debug/ocfs2/BC4F4550BEA74F92BDCC746AAD2EC0BF/fs_state Device => Id: 8,65 Uuid: BC4F4550BEA74F92BDCC746AAD2EC0BF Gen: 0xA02024F2 Label: sunil-xattr Volume => State: 1 Flags: 0x0 Sizes => Block: 4096 Cluster: 4096 Features => Compat: 0x1 Incompat: 0x350 ROcompat: 0x1

...(!page) + return -ENOMEM; + + cgroup_lock(); + if (cgroup_is_removed(cont)) { + cgroup_unlock(); + ret = -ENODEV; + goto out; + } + + cfqc = cgroup_to_cfq_cgroup(cont); + + cgroup_unlock(); + + /* print priority */ + ret = snprintf(page, PAGE_SIZE, "%d \n", cfqc->ioprio); + + ret = simple_read_from_buffer(userbuf, nbytes, ppos, page, ret); + +out: + free_page((unsigned long)page); + return ret; +} + +static ssize_t cfq_cgroup_write(struct cgroup *cont, struct cftype *cft, + struct file *file, const char __user *userbuf, + size_t nbytes, loff_t *ppos) +{ + struct cfq_cgroup *cfqc; + ssize_t ret...

...le_cpu(cpu) fb346fd9fc081c Waiman Long 2019-04-04 77 sum += per_cpu(lockevents[id], cpu); fb346fd9fc081c Waiman Long 2019-04-04 78 len = snprintf(buf, sizeof(buf) - 1, "%llu\n", sum); fb346fd9fc081c Waiman Long 2019-04-04 79 fb346fd9fc081c Waiman Long 2019-04-04 80 return simple_read_from_buffer(user_buf, count, ppos, buf, len); fb346fd9fc081c Waiman Long 2019-04-04 81 } fb346fd9fc081c Waiman Long 2019-04-04 82 fb346fd9fc081c Waiman Long 2019-04-04 83 /* fb346fd9fc081c Waiman Long 2019-04-04 84 * Function to handle write request fb346fd9fc081c Waiman Long 2019-04-04 85 *...

The 4-patch series to follow this email extends KVM-hypervisor and Linux guest running on KVM-hypervisor to support pv-ticket spinlocks, based on Xen's implementation. One hypercall is introduced in KVM hypervisor,that allows a vcpu to kick another vcpu out of halt state. The blocking of vcpu is done using halt() in (lock_spinning) slowpath. The V2 change discussion was in:

The 4-patch series to follow this email extends KVM-hypervisor and Linux guest running on KVM-hypervisor to support pv-ticket spinlocks, based on Xen's implementation. One hypercall is introduced in KVM hypervisor,that allows a vcpu to kick another vcpu out of halt state. The blocking of vcpu is done using halt() in (lock_spinning) slowpath. The V2 change discussion was in:

...eads. */ + if (*ppos) + return 0; + do { + start = read_seqcount_begin(&rq_stats->dbg_seq); + avg = rq_stats->avg_pkt_len; + } while (read_seqcount_retry(&rq_stats->dbg_seq, start)); + len = scnprintf(buf, sizeof(buf), "%u\n", get_mergeable_buf_len(&avg)); + return simple_read_from_buffer(userbuf, count, ppos, buf, len); +} + +void receive_queue_stats_free(struct kref *ref) +{ + struct receive_queue_stats *rq_stats; + + rq_stats = container_of(ref, struct receive_queue_stats, refcount); + kfree(rq_stats); +} + +static int receive_queue_stats_debugfs_open(struct inode *inode, +...

...| 2 +- fs/ocfs2/stack_user.c | 19 +-- fs/ocfs2/super.c | 6 +- include/linux/configfs.h | 4 +- 22 files changed, 390 insertions(+), 124 deletions(-) Akinobu Mita (1): ocfs2: use simple_read_from_buffer() Coly Li (1): ocfs2: fix oops in mmap_truncate testing Joel Becker (3): ocfs2: Fix CONFIG_OCFS2_DEBUG_FS #ifdefs ocfs2: Don't snprintf() without a format. configfs: Allow ->make_item() and ->make_group() to return detailed errors. Louis Rilling (6): confi...

The 5-patch series to follow this email extends KVM-hypervisor and Linux guest running on KVM-hypervisor to support pv-ticket spinlocks, based on Xen's implementation. One hypercall is introduced in KVM hypervisor,that allows a vcpu to kick another vcpu out of halt state. The blocking of vcpu is done using halt() in (lock_spinning) slowpath. Changes in V4: - reabsed to 3.2.0 pre. - use APIC

The 5-patch series to follow this email extends KVM-hypervisor and Linux guest running on KVM-hypervisor to support pv-ticket spinlocks, based on Xen's implementation. One hypercall is introduced in KVM hypervisor,that allows a vcpu to kick another vcpu out of halt state. The blocking of vcpu is done using halt() in (lock_spinning) slowpath. Changes in V4: - reabsed to 3.2.0 pre. - use APIC

The 6-patch series to follow this email extends KVM-hypervisor and Linux guest running on KVM-hypervisor to support pv-ticket spinlocks, based on Xen's implementation. One hypercall is introduced in KVM hypervisor,that allows a vcpu to kick another vcpu out of halt state. The blocking of vcpu is done using halt() in (lock_spinning) slowpath. one MSR is added to aid live migration. Changes

The 6-patch series to follow this email extends KVM-hypervisor and Linux guest running on KVM-hypervisor to support pv-ticket spinlocks, based on Xen's implementation. One hypercall is introduced in KVM hypervisor,that allows a vcpu to kick another vcpu out of halt state. The blocking of vcpu is done using halt() in (lock_spinning) slowpath. one MSR is added to aid live migration. Changes

Please review the list of patches being applied to the ocfs2 1.4 tree. All patches list the mainline commit hash. Thanks Sunil

skb_page_frag_refill currently permits only order-0 page allocs unless GFP_WAIT is used. Change skb_page_frag_refill to attempt higher-order page allocations whether or not GFP_WAIT is used. If memory cannot be allocated, the allocator will fall back to successively smaller page allocs (down to order-0 page allocs). This change brings skb_page_frag_refill in line with the existing page allocation

skb_page_frag_refill currently permits only order-0 page allocs unless GFP_WAIT is used. Change skb_page_frag_refill to attempt higher-order page allocations whether or not GFP_WAIT is used. If memory cannot be allocated, the allocator will fall back to successively smaller page allocs (down to order-0 page allocs). This change brings skb_page_frag_refill in line with the existing page allocation

Hello all, Here is a new iteration of the patch series that implements a transport for guest and host communications. I've tested for compatibility (old qemu & new kernel, new qemu & old kernel, new qemu & new kernel) and it all works fine. To maintain backward compatibility, the first port to be spawned (port at id 0) is to be a console port, to be bound to hvc. This keeps new

Hello all, Here is a new iteration of the patch series that implements a transport for guest and host communications. I've tested for compatibility (old qemu & new kernel, new qemu & old kernel, new qemu & new kernel) and it all works fine. To maintain backward compatibility, the first port to be spawned (port at id 0) is to be a console port, to be bound to hvc. This keeps new