1. 18 Feb, 2004 40 commits
    • Andrew Morton's avatar
      [PATCH] Fix race in epoll_ctl(EPOLL_CTL_MOD) · 2328d92a
      Andrew Morton authored
      From: Davide Libenzi <davidel@xmailserver.org>
      
      A potential race can happen in epoll_ctl(EPOLL_CTL_MOD) where an event can
      happen in between f_op->poll() and the lock on ep->lock (we cannot call
      f_op->poll() inside a lock, and the f_op->poll() callback does not carry
      any info at the current time - missing wake_up_info() already ;).  In that
      case the event would be removed.  We can easily leave the event inside the
      ready list and have the ep_send_events() logic do the job for us at later
      time.  (Thanks to david.lee@teracruz.com for reporting the thing, since it
      shouldn't have been a nice one ;)
      2328d92a
    • Andrew Morton's avatar
      [PATCH] add clock_was_set() to all architectures · 2268bb30
      Andrew Morton authored
      From: Anton Blanchard <anton@samba.org>
      
      Add clock_was_set to all architectures.  I'm disappointed this wasnt done by
      whoever wrote the code.
      
      (It is a callback which the arch-specific RTC-updating code must make when
      someone sets the time).
      2268bb30
    • Andrew Morton's avatar
      [PATCH] Module headers cleanup · 580c4c3b
      Andrew Morton authored
      From: Brian Gerst <bgerst@didntduck.org>
      
      Cleans up some leftovers from the old module loader:
      
      - Remove unused defines from modules.h
      
      - Remove unused file modsetver.h
      580c4c3b
    • Andrew Morton's avatar
      [PATCH] Documentation on how to debug modules · e954d910
      Andrew Morton authored
      From: Alex Goddard <agoddard@purdue.edu>
      
      How to debug module loading problems.  The wording is a slightly changed
      version of what Rusty said.
      e954d910
    • Andrew Morton's avatar
      [PATCH] Fix __release_region() race · 43630c2c
      Andrew Morton authored
      From: MAEDA Naoaki <maeda.naoaki@jp.fujitsu.com>
      
      I am testing PCI hot-plug in 2.6.2 kernel, but sometimes a struct resource
      tree in kernel/resource.c was broken if multiple hot-plug requests are
      issued at the same time.
      
      The reason is lots of drivers call release_region() on hot removal, and
      __release_region(), which is invoked by release_region() macro, changes the
      tree without holding a writer lock for resource_lock.
      
      I think __release_region() must hold a writer lock as well as
      __request_region() does.
      
      A following patch fixes the issue in my environment.
      43630c2c
    • Andrew Morton's avatar
      [PATCH] remove max_anon limit · b75add94
      Andrew Morton authored
      From: Tim Hockin <thockin@sun.com>
      
      Remove the max_anon via dynamically allocation.  We also change the
      idr_pre_get() interface to take a gfp mask, which should have always been
      there.
      b75add94
    • Andrew Morton's avatar
      [PATCH] oprofile: add Pentium Mobile support · 7de09205
      Andrew Morton authored
      From: Philippe Elie <phil.el@wanadoo.fr>
      
      From: Will Cohen <wcohen@redhat.com>
      
      Add oprofile support for Pentium Mobile (P6 core).  Pentium Mobile needs to
      unmask LVPTC vector, since it doesn't hurt other P6 core based cpus we do
      it unconditionally for all these.
      
      This patch require userspace tools >= 0.8 (only in sourceforge cvs currently)
      7de09205
    • Andrew Morton's avatar
      [PATCH] oprofile: ARM infrastructure · 3a67d0c3
      Andrew Morton authored
      From: Philippe Elie <phil.el@wanadoo.fr>
      
      From: Zwane Mwaikambo <zwane@arm.linux.org.uk>
      
      This patch adds infrastructure code and enables ARM to utilise the timer
      int oprofile driver.  There is PMU code under development for the XScale
      but that is still forthcoming.  In the meantime you can use the timer int
      driver with an updated Oprofile-CVS userspace (SF is a bit slow, please
      allow 24hrs).
      3a67d0c3
    • Andrew Morton's avatar
      [PATCH] Oprofile: fix nmi_timer_int detection · 01d5c986
      Andrew Morton authored
      From: Philippe Elie <phil.el@wanadoo.fr>
      
      From: Zwane Mwaikambo <zwane@arm.linux.org.uk>
      
      The nmi_timer_int oprofile driver was enabling itself unconditionally if an
      SMP kernel was being used on a UP system without an IOAPIC.
      
      Tested on a P5 using NMI timer int driver and UP system using timer int
      driver both running an SMP kernel.
      
      2004-02-11  Zwane Mwaikambo <zwane@arm.linux.org.uk>
      
      	* arch/i386/kernel/nmi.c: export nmi_active
      	* arch/i386/oprofile/nmi_timer_int.c: use it to check if owe can use
      	  an nmi interrupt
      01d5c986
    • Andrew Morton's avatar
      [PATCH] 3c59x: bring back the `enable_wol' option · 9d6f9be1
      Andrew Morton authored
      Some machines appear to have BIOS problems which are causing 3c59x adapters
      to come up in a powered-off state when WOL and PM are enabled.
      
      So bring back the 2.4 `enable_wol' module option which disables wake-on-lan
      unless the user specifically asked for it.
      9d6f9be1
    • Andrew Morton's avatar
      [PATCH] cleanup patch that prepares for 4Kb stacks · f96489a2
      Andrew Morton authored
      From: Arjan van de Ven <arjanv@redhat.com>
      
      I have 4Kb stacks + IRQ stacks working in my tree.  The biggest part of the
      4K-stacks work is changing hardcoded 8Kb assumptions to the proper,
      pre-existing define for this.  That part of the patch is appropriate in
      general, even when 4Kb stacks might not be.
      f96489a2
    • Andrew Morton's avatar
      [PATCH] fix display of NBD in /proc/partitions · 0c39a2fa
      Andrew Morton authored
      The recent change to /proc/partitions which prevents it from displaying
      removeable media accidentally caused 128 NBD and 16 ramdisk partitions to
      appear in /proc/partitions instead.
      
      So add a specific gendisk flag which says "don't show me in /proc/partitions"
      and use that.
      0c39a2fa
    • Andrew Morton's avatar
      [PATCH] skip offline CPUs in show_free_areas · 0b9ce3ae
      Andrew Morton authored
      From: Christoph Hellwig <hch@lst.de>
      
      Don't try to display the per-cpu information for CPUs which aren't there.
      0b9ce3ae
    • Andrew Morton's avatar
      [PATCH] off_t in nfsd_commit needs to be loff_t · 6a69bfee
      Andrew Morton authored
      From: Neil Brown <neilb@cse.unsw.edu.au>,
      
      From: Miquel van Smoorenburg <miquels@cistron.nl>
      
      While I was stress-testing NFS/XFS on 2.6.1/2.6.2-rc, I found that
      sometimes my "dd" would exit with:
      
      	#  dd if=/dev/zero bs=4096 > /mnt/file
      	dd: writing `standard output': Invalid argument
      	1100753+0 records in
      	1100752+0 records out
      
      After adding some debug printk's to the server and client code and some
      tcpdump-ing, I found that the NFSERR_INVAL was returned by nfsd_commit on
      the server.
      
      Turns out that the "offset" argument is off_t instead of loff_t.  It isn't
      used at all (unfortunately), but it _is_ checked for sanity, so that's
      where the error came from.
      6a69bfee
    • Andrew Morton's avatar
      [PATCH] drivers/char/vt possible race · ce8b13c9
      Andrew Morton authored
      From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      
      I falled again on the crash in con_do_write() with driver->data beeing
      NULL.  It happens during boot, when userland is playing open/close games
      with tty's, I was intentionally typing keys like mad during boot trying to
      trigger another problem when this one poped up.
      
      Looking at the code, I'm not sure how protected we are by the above (tty)
      layer, paulus told me to not rely on anything like locking coming from
      there, so I decided to extend the scope of the console semaphore one more
      bit to cover races between calls to con_open, con_close and con_write.
      Note that in con_do_write, I intentionally drop the semaphore to avoid
      keeping it held when waiting on the local buffer, and I added some sanity
      checks on tty->driver_data with some printk's in case we still have an open
      race by the tty layer.  At least, now, the couple vc_allocated &
      tty->driver_data should be protected though.
      ce8b13c9
    • Andrew Morton's avatar
      [PATCH] /proc thread visibility fixes · 9b6722ed
      Andrew Morton authored
      From: Kingsley Cheung <kingsley@aurema.com>
      
      Is is possible to examine the data of tasks currently existing in the system
      which are not threads of the same thread group.
      
      For example, the only task in the group where init is group leader is itself:
      
      gen2 02:50:44 ~: ls /proc/1/task
      1
      
      However, I can then read the contents of 'stat' for any other task in the
      system:
      
      gen2 02:49:45 ~: cat /proc/1/task/$$/stat
      1669 (bash) S 1668 1669 1669 34816 1730 256 1480 6479 12 4 8 5 5 17 15 0 1 0
      +8065 3252224 451 4294967295 134512640 134955932 3221225104 3221222840
      +4294960144 0 65536 3686404 1266761467 3222442959 0 0 17 0 0 0
      
      I had a look at fs/proc/base.c and found that the 'lookup' functions for
      these directories were checking that the task in question existed, but
      overlooked the following:
      
      1.  In the function proc_pid_lookup, a check is required to ensure that
          the task in question is a thread group leader.  Without the check, any
          task can have its data retrieved accordingly.  Consider the following.
          There is a multithreaded process 1777.
      
      gen2 23:22:47 /proc/1777: ls task
      1777  1778  1779  1780  1781  1782  1783  1784  1785  1786  1787  1788
      
      However, I can read the stat file for its thread 1778 as follows:
      
      gen2 23:22:50 /proc/1777: cat /proc/1778/stat
      1778 (multithreadtest) T 1777 1777 1672 34816 1672 64 0 0 0 0 14 17 0 0 15 0 12 0 8871 24727552 104 4294967295 134512640 134515104 3221222496 1077365276 4294960144 0 0 0 0 3222479248 0 0 -1 1 0 0
      
      But 1778 is not meant to show up in /proc/, as intended right?:
      
      gen2 23:22:56 /proc/1777: ls /proc/
      1     1365  1661  1793  881        dma          kcore       scsi
      10    1371  1662  18    9          driver       kmsg        self
      1014  1372  1663  2     909        execdomains  loadavg     slabinfo
      1032  14    1664  3     963        fb           locks       stat
      1062  15    1665  4     966        filesystems  mdstat      swaps
      1066  16    1666  5     buddyinfo  fs           meminfo     sys
      1067  1605  1669  6     bus        ide          misc        sysrq-trigger
      1087  1610  1670  7     cmdline    interrupts   modules     sysvipc
      1095  1611  1671  736   cpuinfo    iomem        mounts      tty
      11    1641  1672  8     crypto     ioports      mtrr        uptime
      12    1658  17    807   devices    irq          net         version
      13    1660  1777  810   diskstats  kallsyms     partitions  vmstat
      
      2.  The other part of the bug is in the function proc_task_lookup.  Here
          there needs to be a check that the task X is indeed a thread of the
          thread group Y when we read /proc/<Y>/task/<X>.
      
      Right now, this check does not exist, which allows for any existing
      task to have its data read from another thread group directory.  The
      following reads the stat directory of my bash shell from the thread
      group 1.
      
      gen2 23:28:07 ~: cd /proc/1
      gen2 23:28:10 /proc/1: ls
      auxv     cwd      exe  maps  mounts  stat   status  wchan
      cmdline  environ  fd   mem   root    statm  task
      gen2 23:28:11 /proc/1: ls task
      1
      gen2 23:28:27 /proc/1: cat task/$$/stat
      1671 (bash) S 1670 1671 1671 34817 1802 256 1953 8101 12 4 10 6 9 26 15 0 1 0 5789 3252224 454 4294967295 134512640 134955932 3221225104 3221222840 4294960144 0 65536 3686404 1266761467 3222442959 0 0 17 0 0 0
      9b6722ed
    • Andrew Morton's avatar
      [PATCH] Minor cross-compile issues · 8bbb25c3
      Andrew Morton authored
      From: Pratik Solanki <pratik.solanki@timesys.com>
      
      - Fix include path for build.c so that it finds asm/boot.h.
        /usr/include/asm/boot.h may not be present when cross-compiling on a
        non-Linux machine.
      
      - $(CONFIG_SHELL) instead of sh.
      8bbb25c3
    • Andrew Morton's avatar
      [PATCH] cpufreq_scale() fixes · 2da050c4
      Andrew Morton authored
      From: Dominik Brodowski <linux@dominikbrodowski.de>
      
      Use do_div on 32-bit archs in cpufreq_scale, and native "/" on 64-bit
      archs.
      2da050c4
    • Andrew Morton's avatar
      [PATCH] defer panic for too many items in boot parameter line · f9d4cdfc
      Andrew Morton authored
      From: Werner Almesberger <werner@almesberger.net>
      
      When passing too many unrecognized boot command line options (which become
      arguments or environment variables), the 2.6 kernel panics (unlike 2.4,
      which just ignores the extra items).  Unfortunately, this happens before
      the console is initialized, so all you get is a kernel that dies quickly,
      for no apparent reason.
      
      This is particularly irritating if using UML with
      init=something wi th a lot of ar gu men t s
      
      The patch below delays the panic until after console_init.
      
      (akpm: I mainly added this in because we have other places where the
      panic-later-on machinery is needed).
      f9d4cdfc
    • Andrew Morton's avatar
      [PATCH] adfs: remove a kernel 2.2 #ifdef · 0ad0b87d
      Andrew Morton authored
      From: Adrian Bunk <bunk@fs.tum.de>
      
      The patch below removes a kernel 2.2 #ifdef from fs/adfs/adfs.h .
      
      Note that this #ifdef was only present in the header, the implementation
      of adfs_bmap was already removed.
      0ad0b87d
    • Andrew Morton's avatar
      [PATCH] kbuild documentation fix · 4f3a9491
      Andrew Morton authored
      From: Ryan Boder <icanoop@bitwiser.org>
      
      Explains how to compile external modules in
      Documentation/kbuild/modules.txt.
      4f3a9491
    • Andrew Morton's avatar
      [PATCH] remove kernel 2.2 #ifdef's from {i,}stallion.h · c9700b7e
      Andrew Morton authored
      From: Adrian Bunk <bunk@fs.tum.de>
      
      The patch below removeskernel 2.2 #ifdef's from {i,}stallion.h .
      c9700b7e
    • Andrew Morton's avatar
      [PATCH] OSS: remove #ifdef's for kernel 2.0 · 32856f32
      Andrew Morton authored
      From: Adrian Bunk <bunk@fs.tum.de>
      
      The patch below removes two #ifdef's for kernel 2.0 from OSS.
      32856f32
    • Andrew Morton's avatar
      [PATCH] Rename bitmap_snprintf() and cpumask_snprintf() to *_scnprintf() · e9dc2e51
      Andrew Morton authored
      From: Joe Korty <joe.korty@ccur.com>
      
      Rename bitmap_snprintf() to bitmap_scnprintf() and cpumask_snprintf() to
      cpumask_scnprintf(), as these functions now belong to the scnprintf family
      of functions.
      e9dc2e51
    • Andrew Morton's avatar
      [PATCH] MCE fixes and cleanups · 3aa6ed84
      Andrew Morton authored
      Andi notes that the
      
      	smp_call_function(foo);
      	foo();
      
      in there is incorrect on preemptible kernels.
      
      Fix that by using on_each_cpu(), which takes care of such things.
      
      Also, remove the open-coded timer from here.  We have
      schedule_delayed_work().
      
      And remove the `timerset' variable, which doesn't do anything.
      3aa6ed84
    • Andrew Morton's avatar
      [PATCH] Fix printk level on non fatal MCEs · 2d943d44
      Andrew Morton authored
      From: Andi Kleen <ak@suse.de>
      
      For various reasons non fatal Machine Checks can happen on Athlons (e.g.
      we have reports that laptops like to trigger them on suspend/resume)
      
      They are not necessarily fatal and often only minor hardware glitches.
      
      But what's annoying is that they're KERN_EMERG and pollute your console and
      scare the user into writing confused kernel bug reports.
      
      This patch just replaces the KERN_EMERGs with KERN_INFO for now.  Longer
      term I think it would be better to log this stuff into a separate log.
      2d943d44
    • Andrew Morton's avatar
      [PATCH] 8259 timer ack fix · 660ab10c
      Andrew Morton authored
      From: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
      
      Fix up the 8259 ack handling for buggy SMM firmware.
      
      See http://www.ussg.iu.edu/hypermail/linux/kernel/0203.2/0956.html
      
      Apparently the embedded 8259A-compatible core is not fully functional.
      This patch lets the I/O APIC-driven NMI watchdog to function correctly.
      Credit to Ross Dickson for discovering this.
      660ab10c
    • Andrew Morton's avatar
      [PATCH] dm: drop BIO_SEG_VALID bit · d4634c58
      Andrew Morton authored
      From: Joe Thornber <thornber@redhat.com>
      
      I just noticed that bio_clone copies the BIO_SEG_VALID bit from the original
      bio when it was set.  When we modify bi_idx or bi_vcnt afterwards the segment
      counts are invalid and the bit must be dropped (though it is fairly unlikely
      that it has already been set).  [Christophe Saout]
      d4634c58
    • Andrew Morton's avatar
      [PATCH] dm: Remove redundant spin lock in dec_pending() · 01fce686
      Andrew Morton authored
      From: Joe Thornber <thornber@redhat.com>
      
      Remove redundant spin lock in dec_pending()
      01fce686
    • Andrew Morton's avatar
      [PATCH] dm: Zero size target sanity check · bc553993
      Andrew Morton authored
      From: Joe Thornber <thornber@redhat.com>
      
      Add sanity check to dm_table_add_target() against zero length targets.
      [Christophe Saout]
      bc553993
    • Andrew Morton's avatar
      [PATCH] dm: Correct GFP flag in dm_table_create() · 2c2eae81
      Andrew Morton authored
      From: Joe Thornber <thornber@redhat.com>
      
      For some reason dm_table_create() was allocating GFP_NOIO rather than
      GFP_KERNEL.
      2c2eae81
    • Andrew Morton's avatar
      [PATCH] dm: Tidy up the error path for alloc_dev() · 6b1b56f9
      Andrew Morton authored
      From: Joe Thornber <thornber@redhat.com>
      
      Tidy up the error path for alloc_dev()
      6b1b56f9
    • Andrew Morton's avatar
      [PATCH] dm: Maintain ordering when deferring bios · 54e37e09
      Andrew Morton authored
      From: Joe Thornber <thornber@redhat.com>
      
      Make sure that we maintain ordering when deferring bios.
      54e37e09
    • Andrew Morton's avatar
      [PATCH] dm: Get rid of struct dm_deferred_io in dm.c · a0befbbc
      Andrew Morton authored
      From: Joe Thornber <thornber@redhat.com>
      
      Remove struct dm_deferred_io from dm.c.  [Christophe Saout]
      a0befbbc
    • Andrew Morton's avatar
      [PATCH] dm: Move to_bytes() and to_sectors() into dm.h · 0901c174
      Andrew Morton authored
      From: Joe Thornber <thornber@redhat.com>
      
      Move to_bytes() and to_sectors() into dm.h
      0901c174
    • Andrew Morton's avatar
      [PATCH] dm: Export dm_vcalloc() · c087ec3d
      Andrew Morton authored
      From: Joe Thornber <thornber@redhat.com>
      
      Export dm_vcalloc()
      c087ec3d
    • Andrew Morton's avatar
      [PATCH] md: Allow partitioning of MD devices. · 1797a796
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      With this patch, md used two major numbers for arrays.
      
      One Major is number 9 with name 'md' have unpartitioned md arrays, one per
      minor number.
      
      The other Major is allocated dynamically with name 'mdp' and had on array for
      every 64 minors, allowing for upto 63 partitions.
      
      The arrays under one major are completely separate from the arrays under the
      other.
      
      The preferred name for devices with the new major are of the form:
      
        /dev/md/d1p3  # partion 3 of device 1 - minor 67
      
      When a paritioned md device is assembled, the partitions are not recognised
      until after the whole-array device is opened again.  A future version of
      mdadm will perform this open so that the need will be transparent.
      1797a796
    • Andrew Morton's avatar
      [PATCH] md: Dynamically limit size of bio requests used for raid1 resync · 5077fef0
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      Currently raid1 uses PAGE_SIZE read/write requests for resync, as it doesn't
      know how to honour per-device restrictions.  This patch uses to bio_add_page
      to honour those restrictions and ups the limit on request size to 64K.  This
      has a measurable impact on rebuild speed (25M/s -> 60M/s)
      5077fef0
    • Andrew Morton's avatar
      [PATCH] md: Avoid unnecessary bio allocation during raid1 resync · 89654f5b
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      For each resync request, we allocate a "r1_bio" which has a bio "master_bio"
      attached that goes largely unused.  We also allocate a read_bio which is
      used.  This patch removes the read_bio and just uses the master_bio instead.
      
      This fixes a bug wherein bi_bdev of the master_bio wasn't being set, but was
      being used.
      
      We also introduce a new "sectors" field into the r1_bio as we can no-longer
      rely in master_bio->bi_sectors.
      89654f5b
    • Andrew Morton's avatar
      [PATCH] md: Remove some un-needed fields from r1bio_s · d0d464b1
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      next_r1 is never used, so it can just go.
      
      read_bio isn't needed as we can easily use one of the pointers in the
      write_bios array - write_bios[->read_disk].  So rename "write_bios" to "bios"
      and store the pointer to the read bio in there.
      d0d464b1