- 09 May, 2007 40 commits
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Heinz Mauelshagen authored
Add a new API to dm-io.c that uses a private mempool and bio_set for each client. The new functions to use are dm_io_client_create(), dm_io_client_destroy(), dm_io_client_resize() and dm_io(). Signed-off-by:
Heinz Mauelshagen <hjm@redhat.com> Signed-off-by:
Alasdair G Kergon <agk@redhat.com> Cc: Milan Broz <mbroz@redhat.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Heinz Mauelshagen authored
Introduce struct dm_io_client to prepare for per-client mempools and bio_sets. Temporary functions bios() and io_pool() choose between the per-client structures and the global ones so the old and new interfaces can co-exist. Make error_bits optional. Signed-off-by:
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Heinz Mauelshagen authored
Delay decrementing the 'struct io' reference count until after the bio has been freed so that a bio destructor function may reference it. Required by a later patch. Signed-off-by:
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Jonathan E Brassow authored
This patch adds the ability to specify desired features in the mirror constructor/mapping table. The first feature of interest is "handle_errors". Currently, mirroring will ignore any I/O errors from the devices. Subsequent patches will check for this flag and handle the errors. If flag/feature is not present, mirror will do nothing - maintaining backwards compatibility. Signed-off-by:
Jonathan E Brassow <jbrassow@redhat.com> Signed-off-by:
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Jonathan E Brassow authored
This patch reports the status of the log device so that userspace can detect the error and take appropriate action. Signed-off-by:
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Jonathan E Brassow authored
This patch gives the disk logging code the ability to store the fact that an error occured on the log device. In addition, an event is raised when an error is encountered during I/O to the log device. Signed-off-by:
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Mike Anderson authored
Allow check_device_area to succeed if a device has an i_size of zero. This addresses an issue seen on DASD devices setting up a multipath table for paths in online and offline state. Signed-off-by:
Mike Anderson <andmike@us.ibm.com> Signed-off-by:
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Edward Goggin authored
Make the mapped device structure accessible to hardware handlers so error messages can include the device name. Signed-off-by:
Edward Goggin <egoggin@emc.com> Signed-off-by:
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Ludwig Nussel authored
Add a new IV generation method 'null' to read old filesystem images created with SuSE's loop_fish2 module. Signed-off-by:
Ludwig Nussel <ludwig.nussel@suse.de> Acked-By:
Christophe Saout <christophe@saout.de> Signed-off-by:
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Olaf Kirch authored
Allocate smaller clones With the previous dm-crypt fixes, there is no need for the clone bios to have the same bvec size as the original - we just need to make them big enough for the remaining number of pages. The only requirement is that we clear the "out" index in convert_context, so that crypt_convert starts storing data at the right position within the clone bio. Signed-off-by:
Olaf Kirch <olaf.kirch@oracle.com> Signed-off-by:
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Olaf Kirch authored
Get rid of first_clone in dm-crypt This gets rid of first_clone, which is not really needed. Apparently, cloned bios used to share their bvec some time way in the past - this is no longer the case. Contrarily, this even hurts us if we try to create a clone off first_clone after it has completed, and crypt_endio has destroyed its bvec. Signed-off-by:
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Olaf Kirch authored
Do not access the bio after generic_make_request We should never access a bio after generic_make_request - there's no guarantee it still exists. Signed-off-by:
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Olaf Kirch authored
Call clone_init early We need to call clone_init as early as possible - at least before call bio_put(clone) in any error path. Otherwise, the destructor will try to dereference bi_private, which may still be NULL. Signed-off-by:
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Milan Broz authored
Disable barriers in dm-crypt because of current workqueue processing can reorder requests. This must be addresed later but for now disabling barriers is needed to prevent data corruption. Signed-off-by:
Milan Broz <mbroz@redhat.com> Signed-off-by:
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Holger Smolinski authored
This patch replaces the single instance of kmirrord by one instance per mirror set. This change is required to avoid a deadlock in kmirrord when the persistent dirty log of a mirror itself resides on a mirror. The single instance of kmirrord then issues a sync write to the dirty log in write_bits which gets deferred to kmirrord itself later in the call chain. But kmirrord never does the deferred work because it is still waiting for the sync write_bits. _mirror_sets is removed as it no longer needed, and we always flush the workqueue before destroying it to ensure all work is complete before destroying it. Signed-off-by:
Holger Smolinski <smolinski@de.ibm.com> Signed-off-by:
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Christoph Lameter authored
This is done in order to be able to run SLUB which expects no modifications to its page structs. Signed-off-by:
Christoph Lameter <clameter@sgi.com> Signed-off-by:
David Howells <dhowells@redhat.com> Signed-off-by:
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Christoph Lameter authored
Fix some of the spelling issues. Fix sentences. Discourage SLOB use since SLUB can pack objects denser. Signed-off-by:
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Pekka J Enberg authored
No "blank" (or "*") line is allowed between the function name and lines for it parameter(s). Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by:
Pekka Enberg <penberg@cs.helsinki.fi> Cc: Christoph Lameter <clameter@sgi.com> Signed-off-by:
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Christoph Lameter authored
In some cases SLUB is creating uselessly slabs that are larger than slub_max_order. Also the layout of some of the slabs was not satisfactory. Go to an iterarive approach. Signed-off-by:
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Christoph Lameter authored
We have information about how long an object existed and about the nodes and cpus where the allocations and frees took place. Add that information to the tracking output in /sys/slab/xx/alloc_calls and /sys/slab/free_calls This will then enable slabinfo to output nice reports like this: christoph@qirst:~/slub$ ./slabinfo kmalloc-128 Slabcache: kmalloc-128 Aliases: 0 Order : 0 Sizes (bytes) Slabs Debug Memory ------------------------------------------------------------------------ Object : 128 Total : 12 Sanity Checks : On Total: 49152 SlabObj: 200 Full : 7 Redzoning : On Used : 24832 SlabSiz: 4096 Partial: 4 Poisoning : On Loss : 24320 Loss : 72 CpuSlab: 1 Tracking : On Lalig: 13968 Align : 8 Objects: 20 Tracing : Off Lpadd: 1152 kmalloc-128 has no kmem_cache operations kmalloc-128: Kernel object allocation ----------------------------------------------------------------------- 6 param_sysfs_setup+0x71/0x130 age=284512/284512/284512 pid=1 nodes=0-1,3 11 percpu_populate+0x39/0x80 age=283914/284428/284512 pid=1 nodes=0 21 __register_chrdev_region+0x31/0x170 age=282896/284347/284473 pid=1-1705 nodes=0-2 1 sys_inotify_init+0x76/0x1c0 age=283423 pid=1004 nodes=0 19 as_get_io_context+0x32/0xd0 age=6/247567/283988 pid=1-11782 nodes=0,2 10 ida_pre_get+0x4a/0x80 age=277666/283773/284526 pid=0-2177 nodes=0,2 24 kobject_kset_add_dir+0x37/0xb0 age=282727/283860/284472 pid=1-1723 nodes=0-2 1 acpi_ds_build_internal_buffer_obj+0xd3/0x11d age=284508 pid=1 nodes=0 24 con_insert_unipair+0xd7/0x110 age=284438/284438/284438 pid=1 nodes=0,2 1 uart_open+0x2d2/0x4b0 age=283896 pid=1 nodes=0 26 dma_pool_create+0x73/0x1a0 age=282762/282833/282916 pid=1705-1723 nodes=0 1 neigh_table_init_no_netlink+0xd2/0x210 age=284461 pid=1 nodes=0 2 neigh_parms_alloc+0x2b/0xe0 age=284410/284411/284412 pid=1 nodes=2 2 neigh_resolve_output+0x1e1/0x280 age=276289/276291/276293 pid=0-2443 nodes=0 1 netlink_kernel_create+0x90/0x170 age=284472 pid=1 nodes=0 4 xt_alloc_table_info+0x39/0xf0 age=283958/283958/283959 pid=1 nodes=1 3 fn_hash_insert+0x473/0x720 age=277653/277661/277666 pid=2177-2185 nodes=0 1 get_mtrr_state+0x285/0x2a0 age=284526 pid=0 nodes=0 1 cacheinfo_cpu_callback+0x26d/0x3e0 age=284458 pid=1 nodes=0 29 kernel_param_sysfs_setup+0x25/0x90 age=284511/284511/284512 pid=1 nodes=0-1,3 5 process_zones+0x5e/0x170 age=284546/284546/284546 pid=0 nodes=0 1 drm_core_init+0x48/0x160 age=284421 pid=1 nodes=2 kmalloc-128: Kernel object freeing ------------------------------------------------------------------------ 163 <not-available> age=4295176847 pid=0 nodes=0-3 1 __vunmap+0x6e/0xf0 age=282907 pid=1723 nodes=0 28 free_as_io_context+0x12/0x90 age=9243/262197/283474 pid=42-11754 nodes=0 1 acpi_get_object_info+0x1b7/0x1d4 age=284475 pid=1 nodes=0 1 do_acpi_find_child+0x45/0x4e age=284475 pid=1 nodes=0 NUMA nodes : 0 1 2 3 ------------------------------------------ All slabs 7 2 2 1 Partial slabs 2 2 0 0 Signed-off-by: -
Christoph Lameter authored
CONFIG_SLUB_DEBUG can be used to switch off the debugging and sysfs components of SLUB. Thus SLUB will be able to replace SLOB. SLUB can arrange objects in a denser way than SLOB and the code size should be minimal without debugging and sysfs support. Note that CONFIG_SLUB_DEBUG is materially different from CONFIG_SLAB_DEBUG. CONFIG_SLAB_DEBUG is used to enable slab debugging in SLAB. SLUB enables debugging via a boot parameter. SLUB debug code should always be present. CONFIG_SLUB_DEBUG can be modified in the embedded config section. Signed-off-by:
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Christoph Lameter authored
Move the tracking definitions and the check_valid_pointer() function away from the debugging related functions. Signed-off-by:
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Christoph Lameter authored
Trace in both slab_alloc and slab_free has a lot of common code. Use a single function for both. Signed-off-by:
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Christoph Lameter authored
This replaces the PageError() checking. DebugSlab is clearer and allows for future changes to the page bit used. We also need it to support CONFIG_SLUB_DEBUG. Signed-off-by:
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Christoph Lameter authored
Move the resiliency check into the SYSFS section after validate_slab that is used by the resiliency check. This will avoid a forward declaration. Signed-off-by:
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Christoph Lameter authored
Scanning of objects happens in a number of functions. Consolidate that code. DECLARE_BITMAP instead of coding the declaration for bitmaps. Signed-off-by:
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Christoph Lameter authored
Update comments throughout SLUB to reflect the new developments. Fix up various awkward sentences. Signed-off-by:
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Christoph Lameter authored
Its only purpose was to bring some sort of symmetry to sysfs usage when dealing with bootstrapping per cpu flushing. Since we do not time out slabs anymore we have no need to run finish_bootstrap even without sysfs. Fold it back into slab_sysfs_init and drop the initcall for the !SYFS case. Signed-off-by:
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Christoph Lameter authored
We really do not need all this gaga there. ksize gives us all the information we need to figure out if the object can cope with the new size. Signed-off-by:
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Christoph Lameter authored
We needlessly duplicate code. Also make check_valid_pointer inline. Signed-off-by:
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Christoph Lameter authored
-e Show empty slabs -d Modification of slab debug options at runtime -o Operations. Display of ctor / dtor etc. -r Report: Display all available information about a slabcache. Cleanup tracking display and make it work right. Signed-off-by:
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Christoph Lameter authored
If no redzoning is selected then we do not need padding before the next object. Signed-off-by:
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Christoph Lameter authored
SLUB currently assumes that the cacheline size is static. However, i386 f.e. supports dynamic cache line size determination. Use cache_line_size() instead of L1_CACHE_BYTES in the allocator. That also explains the purpose of SLAB_HWCACHE_ALIGN. So we will need to keep that one around to allow dynamic aligning of objects depending on boot determination of the cache line size. [akpm@linux-foundation.org: need to define it before we use it] Signed-off-by:
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Stephen Rothwell authored
This is needed before Powerpc can wire up the syscall. Signed-off-by:
Stephen Rothwell <sfr@canb.auug.org.au> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by:
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Andrew Morton authored
Cc: Pierre Ossman <drzeus@drzeus.cx> Signed-off-by:
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H. Peter Anvin authored
In the process of rewriting the x86 setup code, I found a number of inaccuracies and outdated recommendations in the boot protocol documentation. Revamp to make it more up to date. In particular, the common use of the heap actually requires (slightly) more than 4K of heap plus stack, which is the recommended amount in the document; currently the code compensates by being smaller than specified, but we can't assume that will be true forever. Thus, recommend that if we have a modern bzImage kernel, that the bootloader maximizes the available space. Signed-off-by:
H. Peter Anvin <hpa@zytor.com> Signed-off-by:
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Andrew Morton authored
revert 'sched: redundant reschedule when set_user_nice() boosts a prio of a task from the "expired" array' Revert commit bd53f96c. Con says: This is no good, sorry. The one I saw originally was with the staircase deadline cpu scheduler in situ and was different. #define TASK_PREEMPTS_CURR(p, rq) \ ((p)->prio < (rq)->curr->prio) (((p)->prio < (rq)->curr->prio) && ((p)->array == (rq)->active)) This will fail to wake up a runqueue for a task that has been migrated to the expired array of a runqueue which is otherwise idle which can happen with smp balancing, Cc: Dmitry Adamushko <dmitry.adamushko@gmail.com> Cc: Con Kolivas <kernel@kolivas.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Jean Delvare authored
We have a standard suffix to associate a designation string to a sensor: _label. Use it instead of _position so that libsensors will catch it. (This isn't implemented yet, but should be soon.) Signed-off-by:
Jean Delvare <khali@linux-fr.org> Cc: Nicolas Boichat <nicolas@boichat.ch> Signed-off-by:
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Jean Delvare authored
Let the applesmc device export its address to userspace. libsensors needs this to recognize the device and give it a unique ID. Signed-off-by:
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Tilman Schmidt authored
Zero-sized allocations are pointless anyway, and the SLUB allocator complains about them, so stop doing that. Signed-off-by:
Tilman Schmidt <tilman@imap.cc> Signed-off-by:
Hansjoerg Lipp <hjlipp@web.de> Cc: Greg KH <greg@kroah.com> Signed-off-by:
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