- 08 Mar, 2005 40 commits
-
-
Anton Altaparmakov authored
Implements fallback to file_operations->write in the case that aops->{prepare,commit}_write are not present on the backing filesystem. The fallback happens in two different ways: - For normal loop devices, i.e. ones which do not do transformation on the data but simply pass it along, we simply call fops->write. This should be pretty much just as fast as using aops->{prepare,commit}_write directly. - For all other loop devices (e.g. xor and cryptoloop), i.e. all the ones which may be doing transformations on the data, we allocate and map a page (once for each bio), then for each bio vec we copy the bio vec page data to our mapped page, apply the loop transformation, and use fops->write to write out the transformed data from our page. Once all bio vecs from the bio are done, we unmap and free the page. This approach is the absolute minimum of overhead I could come up with and for performance hungry people, as you can see I left the address space operations method in place for filesystems which implement aops->{prepare,commit}_write. I have tested this patch with normal loop devices using aops->{prepare,commit}_write on the backing filesystem, with normal loop devices using the fops->write code path and with cryptoloop devices using the double buffering + fops->write code path. Signed-off-by:Anton Altaparmakov <aia21@cantab.net> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
-
Zwane Mwaikambo authored
We take down ksoftirqds at CPU_DEAD time, so there is a brief period whereupon there is a ksoftirqd thread for an offline processor, it is at this point that ->cpus_allowed won't have it pinned anymore. An online processor would then take down that ksoftirqd and exit it. Ensure that we only offline the processor when it's safe and never run softirqs in another processor's ksoftirqd context. This also gets rid of the warnings in ksoftirqd on cpu offline. Signed-off-by:
Zwane Mwaikambo <zwane@arm.linux.org.uk> Acked-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
-
Jan Kara authored
Attached patch adds functions ufs_quota_read() and ufs_quota_write() to the UFS code. So quotas for UFS should work again (they were broken by the quota io redesign). I don't actually think the patch is too much important as I'm not sure anybody uses quotas on UFS but we're in the "stable" branch so just dropping a support did not seem right to me. Signed-off-by:
Jan Kara <jack@suse.cz> Signed-off-by:
-
Dave Olien authored
I've had this patch reviewed by Jens, and incorporated his recommended fixes. The patch adds new interfaces to bio.c that support the creation of local bio and bvec pools. This is important for layered drivers that need to allocate new bio and bvec structures in response to bio's submitted to it from higher up. The layered drivers can allocate local pools of bio structures to preclude deadlock under global bio pool exhaustion. The device mapper source files have been modified to remove duplicate bio code, and to use the new interfaces to create local bio pools. From: Dave Olien <dmo@osdl.org> Change bio_clone() to use the global bio_set pool instead of the bio_set pool associated with the bio argument. This is because raid5 and raid6 bio's are not allocated from a bio_set and have no bio_set associated with them. This patch along with the patch Linux just accepted allows raid5 and raid6 to function. Signed-off-by:
-
Ingo Molnar authored
This patch does the final consolidation of asm-*/resource.h file, without changing any of the rlimit definitions on any architecture. Primarily it removes the __ARCH_RLIMIT_ORDER method and replaces it with a more compact and isolated one that allows architectures to define only the offending rlimits. This method has the positive effect that adding a new rlimit can now be purely done via changing asm-generic/resource.h alone. Previously one would have to patch 4 other (sparc, sparc64, alpha and mips) resource.h files. The patch also does style unification, whitespace cleanups and simplification of resource.h files and cleans up the asm-generic/resource.h file as well. I've added more comments too. This patch should have no effect on any code on any architecture. (i.e. it's a pure identity patch.) Tested on x86 and carefully reviewed to make sure that Sparc, Sparc64, MIPS and Alpha rlimits are still the same as required by the ABI. Signed-off-by:
Chris Wright <chrisw@osdl.org> Signed-off-by:
-
ken@mvista.com authored
In lp_write(), copy_from_user() is called to copy data into a statically allocated kernel buffer before down_interruptible() is called. If a second thread of execution comes in between the copy_from_user() and the down_interruptible() calls, silent data corruption could result. Signed-off-by:
-
Stephen Hemminger authored
The /proc/driver/rtc interface didn't have any module owner hook. The simplest fix is to just convert this to the single version of seq_file. Also, fix initialization of rtc_dev to use C99 form. Signed-off-by:
Stephen Hemminger <shemminger@osdl.org> Signed-off-by:
-
Adrian Bunk authored
With the release of gcc 4.0 being only a few months away and people already tring compiling with it, it's time for adding a compiler-gcc4.h . This patch contains the following changes: - remove compiler-gcc+.h - compiler-gcc4.h: new file based on a corrected compiler-gcc+.h - compiler.h: include compiler-gcc4.h for gcc 4 - compiler.h: #error for gcc > 4 - compiler-gcc3.h: remove __compiler_offsetof (there will never be a gcc 3.5) small indention corrections I've tested the compilation with both gcc 3.4.4 and a recent gcc 4.0 snapshot from Debian experimental. Signed-off-by:Adrian Bunk <bunk@stusta.de> Signed-off-by:
-
Ernie Petrides authored
While investigating the 2.4 memory corruption problem fixed by the patch previously posted, it was noticed that the 2.6 version of get_kcore_size() inappropriately uses sizeof(struct memelfnote) in its calculation of the /proc/kcore ELF header size. What is actually stored in the header is an "elf_note" structure plus the 4 ASCII chars "CORE". It just so happens that on 32-bit arches, both calculations result in the same value (16). But on 64-bit arches, the allocated size (24) is larger than necessary (16). This does not result in any possible data corruption, but it might be nice to correct this "conceptual" error. Signed-off-by:
-
Yoichi Yuasa authored
This patch updates serial driver for VR41xx serial unit. Some check are added to verify_port. Signed-off-by:
Yoichi Yuasa <yuasa@hh.iij4u.or.jp> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by:
-
Arun Sharma authored
Move ioctl TCSBRKP support to compat layer. Same rationale as TCSBRK. - Remove corresponding code under ppc64, sparc64 and s390. - Use ULONG_IOCTL() instead of COMPATIBLE_IOCTL(), since the argument is int, not pointer. Signed-off-by:
Gordon Jin <gordon.jin@intel.com> Signed-off-by:
Arun Sharma <arun.sharma@intel.com> Signed-off-by:
-
Ingo Molnar authored
What _is_ inconsistent is kernel/sys.c's setpriority()/set_one_prio(). It checks current->euid|uid against p->uid, which makes little sense, but is how we've been doing it ever since. It's a Linux quirk documented in the manpage. To make things funnier, SuS requires current->euid|uid match against p->euid. The patch below fixes it (and brings the logic in line with what setscheduler()/setaffinity() does), but if we do it then it should be done only in 2.6.12 or later, after good exposure in -mm. (Worst-case this could break an application but i highly doubt it: it at most could deny renicing another task to positive (or in very rare cases, to negative) nice values, which no application should crash on something like that, normally.) Signed-off-by:
-
Yoichi Yuasa authored
This patch adds the output interface control to VR41xx SIU driver. And obsolete function for VR41xx SIU is removed. And add __init for the function used only for initialization. Signed-off-by:
-
Yoichi Yuasa authored
This patch adds serial driver for NEC VR4100 series serial interface unit. The new device numbers have been recorded by LANANA. Signed-off-by:
-
Ingo Molnar authored
This patch makes the /proc/<PID>/maps file easier to parse (both for humans and for applications), by annotating the heap, stack and vdso mappings with [heap], [stack] and [vdso] markers. It makes it easier/faster to determine at a quick glance whether an application has a secure VM layout, and it also makes it easier for tools to determine whether e.g. the heap or stack is executable or not. new maps file, on a patched kernel: 001c4000-001d9000 r-xp 00000000 03:01 19954 /lib/ld-2.3.3.so 001d9000-001db000 rw-p 00014000 03:01 19954 /lib/ld-2.3.3.so 001dd000-002fb000 r-xp 00000000 03:01 19960 /lib/tls/libc-2.3.3.so 002fb000-002fd000 r--p 0011d000 03:01 19960 /lib/tls/libc-2.3.3.so 002fd000-002ff000 rw-p 0011f000 03:01 19960 /lib/tls/libc-2.3.3.so 002ff000-00301000 rw-p 002ff000 00:00 0 08048000-0804c000 r-xp 00000000 03:01 31968 /bin/cat 0804c000-0804d000 rw-p 00003000 03:01 31968 /bin/cat 0804d000-0806e000 rw-p 0804d000 00:00 0 [heap] b7dbc000-b7dbd000 r--p 009d1000 03:01 83628 /usr/lib/locale/locale-archive b7dbd000-b7dc4000 r--p 0097d000 03:01 83628 /usr/lib/locale/locale-archive b7dc4000-b7df1000 r--p 0094a000 03:01 83628 /usr/lib/locale/locale-archive b7df1000-b7ff1000 r--p 00000000 03:01 83628 /usr/lib/locale/locale-archive b7ff1000-b7ff2000 rw-p b7ff1000 00:00 0 bffeb000-c0000000 rw-p bffeb000 00:00 0 [stack] ffffe000-fffff000 ---p 00000000 00:00 0 [vdso] Tested on x86, but should work on all architectures. Signed-off-by:
-
Jens Axboe authored
blk_execute_rq() can oops in wait_for_completion(), if the request has completed before we call wait_for_completion() because blk_end_sync_rq() clears ->waiting when it is entered. Fix this by always using the on-stack completion variable instead. Signed-off-by:
Jens Axboe <axboe@suse.de> Signed-off-by:
-
Jens Axboe authored
For the flush generated requests, we don't have room for sense info right now. This might change in the future so that the sd end_io function can make a better judgement on what to do about an error. So check this in scsi_io_completion(), only copy sense data to request if it has space assigned to it. Signed-off-by:
-
Jens Axboe authored
This reworks the core barrier support to be a lot nicer, so that all the nasty code resides outside of drivers/ide. It requires minimal changes to support in a driver, I've added SCSI support as an example. The ide code is adapted to the new code. With this patch, we support full barriers on sata now. Bart has acked the addition to -mm, I would like for this to be submitted as soon as 2.6.12 opens. Signed-off-by:
-
Jens Axboe authored
This is needed for several things, one in-tree user which I will introduce after this patch. This adds a ->end_io callback to struct request, so it can be used with async io of any sort. Right now users have to wait for completion in a blocking manner. In the next iteration, ->waiting can be folded into ->end_io_data since it is just a special case of that use. From: Peter Osterlund <petero2@telia.com> The problem is that the add-struct-request-end_io-callback patch forgot to update pktcdvd.c. This patch fixes it. Signed-off-by:
Peter Osterlund <petero2@telia.com> Signed-off-by:
-
Jan Blunck authored
d_drop() must use the dentry->d_lock spinlock. In some cases __d_drop() was used without holding the dentry->d_lock spinlock, too. This could end in a race with __d_lookup(). Signed-off-by:
Jan Blunck <j.blunck@tu-harburg.de> Signed-off-by:
-
David Howells authored
The attached patch fixes a race between kallsyms and insmod/rmmod. The problem is this: (1) The various kallsyms functions poke around in the module list without any locking so that they can be called from the oops handler. (2) Although insmod and rmmod use locks to exclude each other, these have no effect on the kallsyms function. (3) Although rmmod modifies the module state with the machine "stopped", it hasn't removed the metadata from the module metadata list, meaning that as soon as the machine is "restarted", the metadata can be observed by kallsyms. It's not possible to say that an item in that list should be ignored if it's state is marked as inactive - you can't get at the state information because you can't trust the metadata in which it is embedded. Furthermore, list linkage information is embedded in the metadata too, so you can't trust that either... (4) kallsyms may be walking the module list without a lock whilst either insmod or rmmod are busy changing it. insmod probably isn't a problem since nothing is going a way, but rmmod is as it's deleting an entry. (5) Therefore nothing that uses these functions can in any way trust any pointers to "static" data (such as module symbol names or module names) that are returned. (6) On ppc64 the problems are exacerbated since the hypervisor may reschedule bits of the kernel, making operations that appear adjacent occur a long time apart. This patch fixes the race by only linking/unlinking modules into/from the master module list with the machine in the "stopped" state. This means that any "static" information can be trusted as far as the next kernel reschedule on any given CPU without the need to hold any locks. However, I'm not sure how this is affected by preemption. I suspect more work may need to be done in that case, but I'm not entirely sure. This also means that rmmod has to bump the machine into the stopped state twice... but since that shouldn't be a common operation, I don't think that's a problem. I've amended this patch to not get spinlocks whilst in the machine locked state - there's no point as nothing else can be holding spinlocks. Signed-Off-By:David Howells <dhowells@redhat.com> Signed-off-by:
-
Liam Girdwood authored
This is a resend of a patch that has been applied to 2.4. The low power codec functionality has also now been included in ALSA. It checks the codec ID before doing an AC97 register reset. This allows the kernel to support low power codecs that are powered down by a reset command. This patch also fixes some other minor issues. Changes:- - Added AC97_DEFAULT_POWER_OFF to ac97_codec_ids[] - ac97_probe now checks hardwired codec ID's before sending a reset - Added support for WM9713 - Moved the codec specific inits after the mixer setup as some init - tings were being clobbered. - Added extra check so that default_digital_ops doesn't overwrite a valid codec_ops. (SPDIF) Signed-off-by:
Liam Girdwood <liam.girdwood@wolfsonmicro.com> Signed-off-by:
-
Corey Minyard authored
This patch fixes a race between the CMOS clock setting and the NMI code. The NMI code indiscriminatly sets index registers and values in the same place the CMOS clock is set. If you are setting the CMOS clock and an NMI occurs, Bad values could be written to or read from the CMOS RAM, or the NMI operation might not occur correctly. Fixing this requires creating a special lock so the NMI code can know its CPU owns the lock an "do the right thing" in that case. This was discovered and the fix has been tested by a very demanding customer who tests the heck of out the software we deliver. Signed-off-by:
Corey Minyard <minyard@acm.org> Signed-off-by:
-
Prasanna Meda authored
Reorder test_root testing from 3,5,7 to 7,5,3 so that average case becomes good. Even number check is added. Signed-off-by:
Prasanna Meda <pmeda@akamai.com> Signed-off-by:
-
Matthew Wilcox authored
If we chose to "do_more", we would double-count the amount freed in the second and subsequent block groups. Fix it the same way as was done in ext2 a couple of years ago. Signed-off-by:
Matthew Wilcox <matthew@wil.cx> Signed-off-by:
-
Matthew Wilcox authored
Rename variables in ext3/balloc.c as was done in ext2 a couple of years ago. Signed-off-by:
-
Matthew Wilcox authored
journal_commit_transaction() is 720 lines long. This patch pulls about 55 of them out into their own function, removes a goto and cleans up the control flow a little. Signed-off-by:
-
Alex Tomas authored
during truncate ext3 calls journal_forget() for freed blocks, but before these blocks go to the transaction and jbd reserves space in log for them (->t_outstanding_credits). also, journal_forget() removes these blocks from the transaction, but doesn't correct log space reservation. for example, removal of 500MB file reserves 136 blocks, but only 10 blocks go to the log. a commit is expensive and correct reservation allows us to avoid needless commits. here is the patch. tested on UP. Signed-off-by:
Alex Tomas <alex@clusterfs.com> Signed-off-by:
-
Alex Tomas authored
Dynamically allocate the holding array for kjournald write patching rather than allocating it on the stack. Signed-off-by:
-
Alex Tomas authored
fix against credits leak in journal_release_buffer() The idea is to charge a buffer in journal_dirty_metadata(), not in journal_get_*_access()). Each buffer has flag call journal_dirty_metadata() sets on the buffer. Signed-off-by:
-
Roman Zippel authored
The vt_struct and vc_data are always allocated together, so there is no need for a separate vt_struct structure. Signed-off-by:
Roman Zippel <zippel@linux-m68k.org> Signed-off-by:
-
Roman Zippel authored
Remove the macros in console_macros.h and so make the structure references explicit. Signed-off-by:
-
Roman Zippel authored
This removes as far as possible unneccessary vc_cons lookups by using a pointer to the vc_data structure instead of the index. The hidden currcons argument in console_macros.h is temporarily replaced with a hidden vc pointer. Signed-off-by:
-
Peter Tiedemann authored
ctc network driver changes: - Properly initialize ccw array. This fixes the stray oopses after an online/offline cycle. - Correct check for already existing channel. - Add missing kfrees. Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
-
Ursula Braun-Krahl authored
With Frank Pavlic <pavlic@de.ibm.com> qeth network driver changes: - Using layer 2 mode IPv6 multicast addresses has not been registered at the OSA card (??? FIXME) - We have to allow QETH_IP_THREAD in qeth_set_online too when running in layer 2 mode otherwise multicast addresses won't be registered at the OSA card. - fake_ll improvements for dhcpcd. - Strip ethernet header of VLAN packets before calling skb_pull. This fixes multicast VLAN traffic stalls. - Fix unused variable warning. Signed-off-by:
Jeff Garzik <jgarzik@pobox.com> Signed-off-by:
-
Ursula Braun-Krahl authored
iucv changes: - Initialize iucv with subsys_initcall to make sure that it is there before either vmlogrdr or netiucv start using it. Signed-off-by:
-
Eric Rossman authored
z90crypt device driver changes: - Correct the condition for which the reader task is scheduled to run. Signed-off-by:
-
Cornelia Huck authored
Common i/o layer changes: - If a device driver tries to start I/O while the common I/O layer wants to start path verification, don't reject the I/O with -EBUSY (which might prompt the driver to retry the next tick) but seemingly accept the I/O and deliver a fake irb with deferred cc 1 after path verification has finished (prompting the driver to retry the I/O). This prevents the device driver from doing useless retries while cio is still busy with path verification. Signed-off-by:
-
Cornelia Huck authored
Common i/o layer changes: - Update scsw information before checking activity control bits in the offline processing. - Clear irb structure after cio initiated I/O completed. - Modify cdev private structure only while holding the lock. - Update scsw information before checking whether we can start path verification. - Only generate a notoper event if the device is not already in the not operation state, otherwise we end up with two unregister calls. Signed-off-by:
-
Martin Schwidefsky authored
Add key management system calls. Signed-off-by:
-
