- 08 Feb, 2006 28 commits
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JANAK DESAI authored
If vm structure is being shared, allocate a new one and copy information from the current, shared, structure. Signed-off-by:
Janak Desai <janak@us.ibm.com> Cc: Al Viro <viro@ftp.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de> Cc: Michael Kerrisk <mtk-manpages@gmx.net> Cc: Andi Kleen <ak@muc.de> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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JANAK DESAI authored
If the namespace structure is being shared, allocate a new one and copy information from the current, shared, structure. Signed-off-by:
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JANAK DESAI authored
If filesystem structure is being shared, allocate a new one and copy information from the current, shared, structure. Signed-off-by:
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JANAK DESAI authored
sys_unshare system call handler function accepts the same flags as clone system call, checks constraints on each of the flags and invokes corresponding unshare functions to disassociate respective process context if it was being shared with another task. Here is the link to a program for testing unshare system call. http://prdownloads.sourceforge.net/audit/unshare_test.c?download Please note that because of a problem in rmdir associated with bind mounts and clone with CLONE_NEWNS, the test fails while trying to remove temporary test directory. You can remove that temporary directory by doing rmdir, twice, from the command line. The first will fail with EBUSY, but the second will succeed. I have reported the problem to Ram Pai and Al Viro with a small program which reproduces the problem. Al told us yesterday that he will be looking at the problem soon. I have tried multiple rmdirs from the unshare_test program itself, but for some reason that is not working. Doing two rmdirs from command line does seem to remove the directory. Signed-off-by:
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JANAK DESAI authored
Documents the new feature, why it is needed, it's cost, design, implementation, and test plan. Signed-off-by:
Michael Kerrisk <mtk-manpages@gmx.net> Signed-off-by:
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Ingo Molnar authored
The spinlock-debug wait-loop was using loops_per_jiffy to detect too long spinlock waits - but on fast CPUs this led to a way too fast timeout and false messages. The fix is to include a __delay(1) call in the loop, to correctly approximate the intended delay timeout of 1 second. The code assumes that every architecture implements __delay(1) to last around 1/(loops_per_jiffy*HZ) seconds. Signed-off-by:
Ingo Molnar <mingo@elte.hu> Cc: Andi Kleen <ak@muc.de> Signed-off-by:
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Nick Piggin authored
Compound pages on SMP systems can now often be freed from pagetables via the release_pages path. This uses put_page_testzero which does not handle compound pages at all. Releasing constituent pages from process mappings decrements their count to a large negative number and leaks the reference at the head page - net result is a memory leak. The problem was hidden because the debug check in put_page_testzero itself actually did take compound pages into consideration. Fix the bug and the debug check. Signed-off-by:
Nick Piggin <npiggin@suse.de> Acked-by:
Hugh Dickins <hugh@veritas.com> Signed-off-by:
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Stephen Smalley authored
Make SELinux depend on AUDIT as it requires the basic audit support to log permission denials at all. Note that AUDITSYSCALL remains optional for SELinux, although it can be useful in providing further information upon denials. Signed-off-by:
Stephen Smalley <sds@tycho.nsa.gov> Acked-by:
James Morris <jmorris@namei.org> Signed-off-by:
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Rafael J. Wysocki authored
Fix compilation problem in PM headers. Signed-off-by:
Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by:
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Dave Jones authored
We had a user trigger this message on a box that had a lot of different mounts, all with different options. It might help narrow down wtf happened if we print out which device failed. Signed-off-by:
Dave Jones <davej@redhat.com> Signed-off-by:
Adrian Bunk <bunk@stusta.de> Signed-off-by:
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Kyle McMartin authored
Userspace can alter the string after the kernel has run strlen_user(). Also: the strlen_user() return value includes the \0, so fix that. Also: handle EFAULT from strlen_user(). It's unlikely anyone is using this code. Very, very unlikely. If I remember correctly, CONFIG_HPUX turns this code on, but one would actually need CONFIG_BINFMT_SOM to load a binary that could cause a problem, and BINFMT_SOM has had an #error in it for quite some time. Signed-off-by:
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Robert Love authored
Fix one-shot support in inotify. We currently drop the IN_ONESHOT flag during watch addition. Fix is to not do that. Signed-off-by:
Robert Love <rml@novell.com> Cc: John McCutchan <ttb@tentacle.dhs.org> Signed-off-by:
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Andrew Morton authored
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Jeff Dike authored
A previous patch removed a file from the build without removing it from the tree. Signed-off-by:
Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by:
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Jeff Dike authored
We weren't making sure that we initialized the FP registers of new processes to sane values. This patch also moves some defines in the affected area closer to where they are used. Signed-off-by:
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Jeff Dike authored
The process that UML uses to probe the host's ptrace capabilities can (rarely) receive a SIGWINCH, confusing the parent. This fixes that by blocking SIGWINCH. Signed-off-by:
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Jeff Dike authored
The network driver added an interface to the "opened" list when it was configured, not when it was brought up, and removed it when it was taken down. A sequence of ifconfig up, ifconfig down, ... caused it to be removed multiple times from the list without being added in between, resulting in a crash. This patch moves the add to when the interface is brought up. Signed-off-by:
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Jeff Dike authored
When UML opens a TUN/TAP device, the file descriptor could be copied into later, long-lived threads, holding the device open even after the interface is taken down, preventing it from being brought up again. This patch makes these descriptors close-on-exec so that they disappear from helper processes, and adds CLONE_FILES to a UML helper thread so that the descriptors are closed in the thread when they are closed elsewhere in UML. Signed-off-by:
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Jeff Dike authored
It doesn't do anything but emit a warning, but there's a user population that's used to adding 'debug' to the UML command line in order to gdb it. With skas0 mode, that's not necessary, but these users need some indication that 'debug' doesn't do what they want. Signed-off-by:
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Suzuki authored
Fix do_path_lookup() to avoid accessing invalid dentry or inode when the link_path_walk() has failed. This should fix Bugme #5897. Signed-off-by:
Suzuki K P <suzuki@in.ibm.com> Signed-off-by:
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Steve Langasek authored
With the latest 2.6.15 kernel builds for alpha on Debian, we ran into a problem with undefined references to __cmpxchg_called_with_bad_pointer() in a couple of kernel modules (xfs.ko and drm.ko; see http://bugs.debian.org/347556). It looks like people have been trying to out-clever each other wrt the definition of "inline" on this architecture :), with the result that __cmpxchg(), which must be inlined so the compiler can see its argument is const, is not guaranteed to be inlined. Indeed, it was not being inlined when building with -Os. The attached patch fixes the issue by adding an __attribute__((always_inline)) explicitly to the definition of __cmpxchg() instead of relying on redefines of "inline" elsewhere to make this happen. Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Signed-off-by:
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Michael Richardson authored
This does not show up unless you #define DEBUG in the file, which most people wouldn't do. On PPC405, at least, "sector_t" is unsigned long, which doesn't match %llx/%llu. Since sector# may well be >32 bits, promote the value to match the format. Signed-off-by:
Michael Richardson <mcr@xelerance.com> Signed-off-by:
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J. Bruce Fields authored
I just noticed that my patch "don't create on open that fails due to ERR_GRACE" (recently commited as fb553c0f) had an obvious problem that causes a deadlock on reboot recovery. Sending in this now since it seems like a clear 2.6.16 candidate.--b. We're returning with a lock held in some error cases. Signed-off-by:
J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by:
Neil Brown <neilb@suse.de> Signed-off-by:
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Christoph Lameter authored
Remove wrong and misleading comments. Return VM_FAULT_OOM if the hugetlbpage fault handler cannot allocate a page. do_no_page will end up doing do_exit(SIGKILL). Signed-off-by:
Christoph Lameter <clameter@sgi.com> Signed-off-by:
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David Gibson authored
When hugepages are newly allocated to a file in mm/hugetlb.c, we clear them with a call to clear_highpage() on each of the subpages. We should be using clear_user_highpage(): on powerpc, at least, clear_highpage() doesn't correctly mark the page as icache dirty so if the page is executed shortly after it's possible to get strange results. Signed-off-by:
David Gibson <dwg@au1.ibm.com> Acked-by:
William Lee Irwin III <wli@holomorphy.com> Cc: <stable@kernel.org> Signed-off-by:
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Ravikiran G Thirumalai authored
Currently, x86_64 and ia64 arches do not clear the corresponding bits in the node's cpumask when a cpu goes down or cpu bring up is cancelled. This is buggy since there are pieces of common code where the cpumask is checked in the cpu down code path to decide on things (like in the slab down path). PPC does the right thing, but x86_64 and ia64 don't (This was the reason Sonny hit upon a slab bug during cpu offline on ppc and could not reproduce on other arches). This patch fixes it for x86_64. I won't attempt ia64 as I cannot test it. Credit for spotting this should go to Alok. (akpm: this was applied, then reverted. But it's OK now because we now use for_each_cpu() in the right places). Signed-off-by:
Alok N Kataria <alokk@calsoftinc.com> Signed-off-by:
Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by:
Shai Fultheim <shai@scalex86.org> Signed-off-by:
Andi Kleen <ak@suse.de> Signed-off-by:
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Pavel Machek authored
- Remove unneeded bio_get() which would cause a bio leak - Writing doesn't dirty pages. Reading dirties pages. - We should dirty the pages after the IO completion, not before (Busy-waiting for disk I/O completion isn't very polite.) Signed-off-by:
Pavel Machek <pavel@suse.cz> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by:
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Russell King authored
drivers/base/bus.c:166: warning: `driver_attr_unbind' defined but not used drivers/base/bus.c:194: warning: `driver_attr_bind' defined but not used Looks like these two attributes and supporting functions want to be #ifdef HOTPLUG'd Signed-off-by:
Russell King <rmk+kernel@arm.linux.org.uk> Cc: Greg KH <greg@kroah.com> Signed-off-by:
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- 07 Feb, 2006 12 commits
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Linus Torvalds authored
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Jens Axboe authored
The softirq rq completion handler needs to save/restore interrupt flags appropriately. Signed-off-by:
Jens Axboe <axboe@suse.de> Signed-off-by:
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Andi Kleen authored
Fix wrong '!' in bad apic fix I forgot to remove the ! when moving the code from x86-64 to i386 x86-64 tested !disable_apic, but of course for cpu_has_apic it shouldn't be negated. Credit goes to Jan Beulich for spotting it with eagle eyes. Cc: Jan Beulich <jbeulich@novell.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Linus Torvalds authored
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Ralf Baechle authored
The reset state is undefined and some firmware doesn't clear this bit possibly resulting in crashes on entry into userland. Signed-off-by:Ralf Baechle <ralf@linux-mips.org>
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Sergei Shtylylov authored
I've noticed that PCI clock was incorrectly reported as 66 MHz while being mere 33 MHz on RBTX4937 board -- this was due to the different encoding of the PCI divisor field in CCFG register between TX4927 and TX4937 chips... Also, RBTX49x7 was printed out as a CPU name (e.g., "CPU is RBTX4937"); and some debug printk() were duplicating each other... Signed-off-by:Konstantin Baydarov <kbaidarov@ru.mvista.com> Signed-off-by:
Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by:
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Atsushi Nemoto authored
If mfc0 $12 follows store and the mfc0 is last instruction of a page and fetching the next instruction causes TLB miss, the result of the mfc0 might wrongly contain EXL bit. ERT-TX49H2-027, ERT-TX49H3-012, ERT-TX49HL3-006, ERT-TX49H4-008 Workaround: mask EXL bit of the result or place a nop before mfc0. It doesn't harm to always clear those bits, so we change the code to do so. Signed-off-by:Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by:
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Ralf Baechle authored
Very much to my surprise Fuxin Zhang reports this is all it takes to get the kernel to work for page sizes larger than 4kB. This also paves the way for support for the R6000 and R8000 which don't support 4kB page size. Signed-off-by: -
Ralf Baechle authored
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Atsushi Nemoto authored
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