- 09 May, 2007 40 commits
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Fernando Luis Vazquez Cao authored
hard_smp_processor_id used to be just a macro that hard-coded hard_smp_processor_id to 0 in the non SMP case. When booting non SMP kernels on hardware where the boot ioapic id is not 0 this turns out to be a problem. This is happens frequently in the case of kdump and once in a great while in the case of real hardware. Use the APIC to determine the hardware processor id in both UP and SMP kernels to fix this issue. Notice that hard_smp_processor_id is only used by SMP code or by code that works with apics so we do not need to handle the case when apics are not present and hard_smp_processor_id should never be called there. Signed-off-by:
Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp> Cc: "Luck, Tony" <tony.luck@intel.com> Acked-by:
Andi Kleen <ak@suse.de> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Fernando Luis Vazquez Cao authored
hard_smp_processor_id used to be just a macro that hard-coded hard_smp_processor_id to 0 in the non SMP case. When booting non SMP kernels on hardware where the boot ioapic id is not 0 this turns out to be a problem. This is happens frequently in the case of kdump and once in a great while in the case of real hardware. Use the APIC to determine the hardware processor id in both UP and SMP kernels to fix this issue. Notice that hard_smp_processor_id is only used by SMP code or by code that works with apics so we do not need to handle the case when apics are not present and hard_smp_processor_id should never be called there. Signed-off-by:
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Fernando Luis Vazquez Cao authored
With the advent of kdump, the assumption that the boot CPU when booting an UP kernel is always the CPU with a particular hardware ID (often 0) (usually referred to as BSP on some architectures) is not valid anymore. The reason being that the dump capture kernel boots on the crashed CPU (the CPU that invoked crash_kexec), which may be or may not be that particular CPU. Move definition of hard_smp_processor_id for the UP case to architecture-specific code ("asm/smp.h") where it belongs, so that each architecture can provide its own implementation. Signed-off-by: -
Dave Gilbert authored
Display all possible partitions when the root filesystem is not mounted. This helps to track spell'o's and missing drivers. Updated to work with newer kernels. Example output: VFS: Cannot open root device "foobar" or unknown-block(0,0) Please append a correct "root=" boot option; here are the available partitions: 0800 8388608 sda driver: sd 0801 192748 sda1 0802 8193150 sda2 0810 4194304 sdb driver: sd Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) [akpm@linux-foundation.org: cleanups, fix printk warnings] Signed-off-by:
Jan Engelhardt <jengelh@gmx.de> Cc: Dave Gilbert <linux@treblig.org> Signed-off-by:
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Miklos Szeredi authored
These haven't been fixed for ages. Just make comments out of them. arch/um/kernel/skas/process.c:181:2: warning: #warning Need to look up +userspace_pid by cpu arch/um/kernel/skas/process.c:187:2: warning: #warning Need to look up +userspace_pid by cpu arch/um/kernel/skas/process.c:194:2: warning: #warning need to loop over +userspace_pids in kill_off_processes_skas Signed-off-by:
Miklos Szeredi <mszeredi@suse.cz> Signed-off-by:
Jeff Dike <jdike@linux.intel.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by:
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Jeff Dike authored
A linuxdoc comment had fallen out of date - it refers to an argument which no longer exists. Signed-off-by:
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Jeff Dike authored
Mark another function as tt-mode only. Signed-off-by:
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Peter Zijlstra authored
Enable (i)SCSI on UML, dunno why SCSI was deemed broken, it works like a charm. Signed-off-by:
Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by:
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Jeff Dike authored
UML now needs required-features.h to build - an empty one suffices. Signed-off-by:
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Rafael J. Wysocki authored
[ With Johannes Berg <johannes@sipsolutions.net> ] Separate the hibernation (aka suspend to disk code) from the other suspend code. In particular: * Remove the definitions related to hibernation from include/linux/pm.h * Introduce struct hibernation_ops and a new hibernate() function to hibernate the system, defined in include/linux/suspend.h * Separate suspend code in kernel/power/main.c from hibernation-related code in kernel/power/disk.c and kernel/power/user.c (with the help of hibernation_ops) * Switch ACPI (the only user of pm_ops.pm_disk_mode) to hibernation_ops Signed-off-by:
Rafael J. Wysocki <rjw@sisk.pl> Cc: Greg KH <greg@kroah.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Nigel Cunningham <nigel@nigel.suspend2.net> Signed-off-by:
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Andrew Morton authored
Remove an inexplicable / Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by:
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Ken Chen authored
The internal hugetlb resv_huge_pages variable can permanently leak nonzero value in the error path of hugetlb page fault handler when hugetlb page is used in combination of cpuset. The leaked count can permanently trap N number of hugetlb pages in unusable "reserved" state. Steps to reproduce the bug: (1) create two cpuset, user1 and user2 (2) reserve 50 htlb pages in cpuset user1 (3) attempt to shmget/shmat 50 htlb page inside cpuset user2 (4) kernel oom the user process in step 3 (5) ipcrm the shm segment At this point resv_huge_pages will have a count of 49, even though there are no active hugetlbfs file nor hugetlb shared memory segment in the system. The leak is permanent and there is no recovery method other than system reboot. The leaked count will hold up all future use of that many htlb pages in all cpusets. The culprit is that the error path of alloc_huge_page() did not properly undo the change it made to resv_huge_page, causing inconsistent state. Signed-off-by:
Ken Chen <kenchen@google.com> Cc: David Gibson <david@gibson.dropbear.id.au> Cc: Adam Litke <agl@us.ibm.com> Cc: Martin Bligh <mbligh@google.com> Acked-by:
David Gibson <dwg@au1.ibm.com> Cc: <stable@kernel.org> Signed-off-by:
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Jonathan Brassow authored
This patch removes the possibility of having uninitialized log state if the log device has failed. When a mirror resumes operation, it calls 'resume' on the logging module. If disk based logging is being used, the log device is read to fill in the log state. If the log device has failed, we cannot simply return, because this would leave the in-memory log state uninitialized. Instead, we assume all regions are out-of-sync and reset the log state. Failure to do this could result in the logging code reporting a region as in-sync, even though it isn't; which could result in a corrupted mirror. Signed-off-by:
Jonathan Brassow <jbrassow@redhat.com> Signed-off-by:
Alasdair G Kergon <agk@redhat.com> Signed-off-by:
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Jonathan Brassow authored
The call to rh_in_sync() in do_reads() should be allowed to block. It is in the mirror worker thread which already permits blocking operations. This will be needed to support clustered mirroring which will perform network operations. Signed-off-by:
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Jonathan Brassow authored
With the code as it is, it is possible for oustanding clear region requests never to get flushed when a mirror is deactivated or suspended. This means there will always be some resync work required when a mirror is activated, even though it may very well be in-sync. Always requesting the flush doesn't hurt us. This is because the log tracks whether any changes occurred and, if not, no flush is performed. Signed-off-by:
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Heinz Mauelshagen authored
New device-mapper target that can delay I/O (for testing). Reads can be separated from writes, redirected to different underlying devices and delayed by differing amounts of time. Signed-off-by:
Heinz Mauelshagen <mauelshagen@redhat.com> Signed-off-by:
Milan Broz <mbroz@redhat.com> Signed-off-by:
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Heinz Mauelshagen authored
More bio_list helper functions for new targets (including dm-delay and dm-loop) to manipulate lists of bios. Signed-off-by:
Heinz Mauelshagen <hjm@redhat.com> Signed-off-by:
Bryn Reeves <breeves@redhat.com> Signed-off-by:
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Milan Broz authored
Remove old dm-io interface. Signed-off-by:
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Milan Broz authored
This patch ports dm-raid1.c to the new dm-io interface. Signed-off-by:
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Heinz Mauelshagen authored
This patch ports dm-log.c to the new dm-io interface in order to make it scalable to have a large number of persistent dirty logs active in parallel. Signed-off-by:
Heinz Mauelshagen <heinzm@redhat.com> Cc: Milan Broz <mbroz@redhat.com> Signed-off-by:
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Heinz Mauelshagen authored
This patch ports dm-exception-store.c to the new, scalable dm_io() interface. It replaces dm_io_get()/dm_io_put() by dm_io_client_create()/dm_io_client_destroy() calls and dm_io_sync_vm() by dm_io() to achive this. Signed-off-by:
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Milan Broz authored
This patch ports kcopyd.c to the new, scalable dm_io() interface. Signed-off-by:
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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:
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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:
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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:
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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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