17 Oct, 2007
40 commits
-
Various architectures may call bust_spinlocks() recursively; the function
itself, however, doesn't appear to be meant to be called in this manner.
Nevertheless, this doesn't appear to be a problem as long as
bust_spinlocks(0) doesn't get called twice in a row (otherwise,
unblank_screen() may enter the scheduler). However, at least on i386 die()
has been capable of returning (and on other architectures this should
really be that way, too) when notify_die() returns NOTIFY_STOP.Short of getting a reply to a respective query, this patch makes
bust_spinlocks() increment/decrement oops_in_progress, and wake klogd only
when the count drops back to zero.Signed-off-by: Jan Beulich
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
To go along with the existing "roundup_pow_of_two" routine, add one for
rounding down since that operation appears to crop up on a regular basis in
the source tree.[m.kozlowski@tuxland.pl: fix unbalanced parentheses]
Signed-off-by: Robert P. J. Day
Signed-off-by: Mariusz Kozlowski
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Arjan van de Ven
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Implement sending of quota messages via netlink interface. The advantage
is that in userspace we can better decide what to do with the message - for
example display a dialogue in your X session or just write the message to
the console. As a bonus, we can get rid of problems with console locking
deep inside filesystem code once we remove the old printing mechanism.Signed-off-by: Jan Kara
Cc: Randy Dunlap
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Since the "ramdisk" kernel parameter has been officially deprecated
since at least 2.6.18, might as well finally get rid of it.Signed-off-by: Robert P. J. Day
Acked-by: Geert Uytterhoeven
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
initrd/initramfs/ramdisk docs:
- fix typos/spellos/grammar
- clarify RAM disk config location
- correct cpio optionAcked-by: Bryan O'Sullivan
Acked-by: Rob Landley
Cc: Werner Almesberger
Cc: H. Peter Anvin
Signed-off-by: Randy Dunlap
Acked-by: Jesper Juhl
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Mathieu Desnoyers
Cc: Grant Grundler
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
local_t is a variant of atomic_t and has related ops to match.
Add reference for local_t documentation to atomic_ops.txt.Signed-off-by: Grant Grundler
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Grant Grundler was asking for more detail about correct usage of local
atomic operations and suggested adding the resulting summary to
local_ops.txt."Please add a bit more detail. If DaveM is correct (he normally is), then
there must be limits on how the local_t can be used in the kernel process
and interrupt contexts. I'd like those rules spelled out very clearly
since it's easy to get wrong and tracking down such a bug is quite
painful."Signed-off-by: Mathieu Desnoyers
Signed-off-by: Grant Grundler
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Since CONFIG_RAMFS is currently hard-selected to "y", and since
Documentation/filesystems/ramfs-rootfs-initramfs.txt reads as follows:"The amount of code required to implement ramfs is tiny, because all the
work is done by the existing Linux caching infrastructure. Basically,
you're mounting the disk cache as a filesystem. Because of this, ramfs is
not an optional component removable via menuconfig, since there would be
negligible space savings."It seems pointless to leave this as a Kconfig entry.
Signed-off-by: Robert P. J. Day
Cc: Al Viro
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The Coverity checker spotted that we have already oops'ed if "disk"
was NULL.Since "disk" being NULL seems impossible at this point this patch
removes the NULL check.Signed-off-by: Adrian Bunk
Acked-by: Mike Miller
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
{,un}register_timer_hook() is the API that should be used.
Signed-off-by: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
kernel/sys_ni.c can't #include due to cond_syscall(),
but let's tell gcc to not warn with -Wmissing-prototypes.Signed-off-by: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The Coverity checker spotted that we'd have already oops'ed if "tty"
was NULL.Since "tty" can't be NULL when we reach this line of code this patch
removes the NULL check.Signed-off-by: Adrian Bunk
Acked-by: Alan Cox
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
All asm/ipc.h files do only #include .
This patch therefore removes all include/asm-*/ipc.h files and moves the
contents of include/asm-generic/ipc.h to include/linux/ipc.h.Signed-off-by: Adrian Bunk
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
mm.h doesn't use directly anything from mutex.h and backing-dev.h, so
remove them and add them back to files which need them.Cross-compile tested on many configs and archs.
Signed-off-by: Alexey Dobriyan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This fixes a problem with the way cciss was filling out the "errors" field
of the request structure upon completion of requests. Previously, it just
put a 1 or a 0 in there and used the negation of this as the uptodate
parameter to one of the functions in the block layer, being a block device.
For the SG_IO ioctl, this was not sufficient, and we noticed that, for
example, sg_turs from sg3_utils did not correctly detect problems due to
cciss having set rq->errors incorrectly.Signed-off-by: Stephen M. Cameron
Acked-by: Mike Miller
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Allow NBD I/O to be cancelled when a network outage occurs. Previously, I/O
would just hang, and if enough I/O was hung in nbd, the system (at least
user-level) would completely hang until a TCP timeout (default, 15 minutes)
occurred.The patch introduces a new ioctl NBD_SET_TIMEOUT that allows a transmit
timeout value (in seconds) to be specified. Any network send that exceeds the
timeout will be cancelled and the nbd connection will be shut down. I've
tested with various timeout values and 6 seconds seems to be a good choice for
the timeout. If the NBD_SET_TIMEOUT ioctl is not called, you get the old (I/O
hang) behavior.Signed-off-by: Paul Clements
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This fixes errors with utilities (such as LVM's vgscan) that try to scan all
devices. Previously this would generate read errors when uninitialized nbd
devices were scanned:# vgscan
Reading all physical volumes. This may take a while...
/dev/nbd0: read failed after 0 of 1024 at 0: Input/output error
/dev/nbd0: read failed after 0 of 1024 at 509804544: Input/output error
/dev/nbd0: read failed after 0 of 2048 at 0: Input/output error
/dev/nbd1: read failed after 0 of 1024 at 509804544: Input/output error
/dev/nbd1: read failed after 0 of 2048 at 0: Input/output errorFrom now on, uninitialized nbd devices will have size zero, which
prevents these errors.Signed-off-by: Paul Clements
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
I would suggest this change to make CodingStyle properly reflect the style
used by the kernel, rather than the current wording which is wishful
thinking and misleading, and comes from the same school of thought that
gets off on prescriptive grammar, latin and comp.std.cSigned-off-by: Alan Cox
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
AUTO_DMA and FLOPPY_MOTOR_MASK in include/asm-*/floppy.h are dead symbols -
remove them.Signed-off-by: Jan Beulich
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The floppy driver is already written to be able to operate in virtual DMA
mode. Thus it can easily be adjusted to tolerate failure from
fd_request_dma() as long as virtual DMA mode is not disallowed.Signed-off-by: Jan Beulich
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Kconfig.preempt is not included on some archs (for example, m68k). On those
archs, the Kconfig machinery complains that KVM selects an undefined symbol
PREEMPT_NOTIFIERS (which lives in Kconfig.preempt).So move the offending symbol into a Kconfig file which is included by
everyone.Cc: Roman Zippel
Cc: Geert Uytterhoeven
Signed-off-by: Avi Kivity
Cc: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
No longer used. TTY_FLIPBUF_SIZE will also go soon but needs a couple of
other cleanups firstSigned-off-by: Alan Cox
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
robust_list, compat_robust_list, pi_state_list, pi_state_cache are
really used if futexes are on.Signed-off-by: Alexey Dobriyan
Acked-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add a prefix "VMCOREINFO_" to the vmcoreinfo macros. Old vmcoreinfo macros
were defined as generic names SYMBOL/SIZE/OFFSET /LENGTH/CONFIG, and it is
impossible to grep for them. So these names should be changed. This
discussion is the following:
http://www.ussg.iu.edu/hypermail/linux/kernel/0709.1/0415.htmlSigned-off-by: Ken'ichi Ohmichi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Ken'ichi Ohmichi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
[2/3] Add nodemask_t's size and NR_FREE_PAGES's value to vmcoreinfo_data.
The dump filetering command 'makedumpfile'(v1.1.6 or before) had assumed
the above values, and it was not good from the reliability viewpoint.
So makedumpfile v1.2.0 came to need these values and I created the patch
to let the kernel output them.
makedumpfile site:
https://sourceforge.net/projects/makedumpfile/Signed-off-by: Ken'ichi Ohmichi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
[1/3] Cleanup the coding style according to Andrew's comments:
http://lists.infradead.org/pipermail/kexec/2007-August/000522.html
- vmcoreinfo_append_str() should have suitable __attribute__s so that
the compiler can check its use.
- vmcoreinfo_max_size should have size_t.
- Use get_seconds() instead of xtime.tv_sec.
- Use init_uts_ns.name.release instead of UTS_RELEASE.Signed-off-by: Ken'ichi Ohmichi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch set frees the restriction that makedumpfile users should install a
vmlinux file (including the debugging information) into each system.makedumpfile command is the dump filtering feature for kdump. It creates a
small dumpfile by filtering unnecessary pages for the analysis. To
distinguish unnecessary pages, it needs a vmlinux file including the debugging
information. These days, the debugging package becomes a huge file, and it is
hard to install it into each system.To solve the problem, kdump developers discussed it at lkml and kexec-ml. As
the result, we reached the conclusion that necessary information for dump
filtering (called "vmcoreinfo") should be embedded into the first kernel file
and it should be accessed through /proc/vmcore during the second kernel.
(http://www.uwsg.iu.edu/hypermail/linux/kernel/0707.0/1806.html)Dan Aloni created the patch set for the above implementation.
(http://www.uwsg.iu.edu/hypermail/linux/kernel/0707.1/1053.html)And I updated it for multi architectures and memory models.
(http://lists.infradead.org/pipermail/kexec/2007-August/000479.html)Signed-off-by: Dan Aloni
Signed-off-by: Ken'ichi Ohmichi
Signed-off-by: Bernhard Walle
Signed-off-by: Daisuke Nishimura
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix this lot:
fs/binfmt_flat.c: In function `decompress_exec':
fs/binfmt_flat.c:293: warning: label `out' defined but not used
fs/binfmt_flat.c: In function `load_flat_file':
fs/binfmt_flat.c:462: warning: unsigned int format, long int arg (arg 3)
fs/binfmt_flat.c:462: warning: unsigned int format, long int arg (arg 4)
fs/binfmt_flat.c:518: warning: comparison of distinct pointer types lacks a cast
fs/binfmt_flat.c:549: warning: passing arg 1 of `ksize' makes pointer from integer without a cast
fs/binfmt_flat.c:601: warning: passing arg 1 of `ksize' makes pointer from integer without a cast
fs/binfmt_flat.c: In function `load_flat_binary':
fs/binfmt_flat.c:116: warning: 'dummy' might be used uninitialized in this functionAcked-by: Greg Ungerer
Cc: David Howells
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Simply fill out the bits in checkstack.pl for Blackfin. I thought I already
sent this, but I don't see it in -mm anywhere ...Signed-off-by: Mike Frysinger
Cc: Bryan Wu
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
do_sigaction() returns -ERESTARTNOINTR if signal_pending(). The comment says:
* If there might be a fatal signal pending on multiple
* threads, make sure we take it before changing the action.I think this is not needed. We should only worry about SIGNAL_GROUP_EXIT case,
bit it implies a pending SIGKILL which can't be cleared by do_sigaction.Kill this special case.
Signed-off-by: Oleg Nesterov
Acked-by: Roland McGrath
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
de_thread() yields waiting for ->group_leader to be a zombie. This deadlocks
if an rt-prio execer shares the same cpu with ->group_leader. Change the code
to use ->group_exit_task/notify_count mechanics.This patch certainly uglifies the code, perhaps someone can suggest something
better.Signed-off-by: Oleg Nesterov
Cc: Roland McGrath
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Now that we don't pre-allocate the new ->sighand, we can kill the first fast
path, it doesn't make sense any longer. At best, it can save one "list_empty()"
check but leads to the code duplication.Signed-off-by: Oleg Nesterov
Cc: Roland McGrath
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
de_thread() pre-allocates newsighand to make sure that exec() can't fail after
killing all sub-threads. Imho, this buys nothing, but complicates the code:- this is (mostly) needed to handle CLONE_SIGHAND without CLONE_THREAD
tasks, this is very unlikely (if ever used) case- unless we already have some serious problems, GFP_KERNEL allocation
should not fail- ENOMEM still can happen after de_thread(), ->sighand is not the last
object we have to allocateChange the code to allocate the new ->sighand on demand.
Signed-off-by: Oleg Nesterov
Cc: Roland McGrath
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
There is no any reason to do recalc_sigpending() after changing ->sighand.
To begin with, recalc_sigpending() does not take ->sighand into account.This means we don't need to take newsighand->siglock while changing sighands.
rcu_assign_pointer() provides a necessary barrier, and if another process
reads the new ->sighand it should either take tasklist_lock or it should use
lock_task_sighand() which has a corresponding smp_read_barrier_depends().Signed-off-by: Oleg Nesterov
Cc: Roland McGrath
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix f_version type: should be u64 instead of long
There is a type inconsistency between struct inode i_version and struct file
f_version.fs.h:
struct inode
u64 i_version;and
struct file
unsigned long f_version;Users do:
fs/ext3/dir.c:
if (filp->f_version != inode->i_version) {
So why isn't f_version a u64 ? It becomes a problem if versions gets
higher than 2^32 and we are on an architecture where longs are 32 bits.This patch changes the f_version type to u64, and updates the users accordingly.
It applies to 2.6.23-rc2-mm2.
Signed-off-by: Mathieu Desnoyers
Cc: Martin Bligh
Cc: "Randy.Dunlap"
Cc: Al Viro
Cc:
Cc: Mark Fasheh
Cc: Christoph Hellwig
Cc: "J. Bruce Fields"
Cc: Trond Myklebust
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Some months back I proposed changing the schedule() call in
read_events to an io_schedule():
http://osdir.com/ml/linux.kernel.aio.general/2006-10/msg00024.html
This was rejected as there are AIO operations that do not initiate
disk I/O. I've had another look at the problem, and the only AIO
operation that will not initiate disk I/O is IOCB_CMD_NOOP. However,
this command isn't even wired up!Given that it doesn't work, and hasn't for *years*, I'm going to
suggest again that we do proper I/O accounting when using AIO.Signed-off-by: Jeff Moyer
Acked-by: Zach Brown
Cc: Benjamin LaHaise
Cc: Suparna Bhattacharya
Cc: Badari Pulavarty
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Repost of http://lkml.org/lkml/2007/8/10/472 made available by request.
The locking used by get_random_bytes() can conflict with the
preempt_disable() and synchronize_sched() form of RCU. This patch changes
rcutorture's RNG to gather entropy from the new cpu_clock() interface
(relying on interrupts, preemption, daemons, and rcutorture's reader
thread's rock-bottom scheduling priority to provide useful entropy), and
also adds and EXPORT_SYMBOL_GPL() to make that interface available to GPLed
kernel modules such as rcutorture.Passes several hours of rcutorture.
[ego@in.ibm.com: Use raw_smp_processor_id() in rcu_random()]
Signed-off-by: Paul E. McKenney
Cc: Ingo Molnar
Signed-off-by: Gautham R Shenoy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
