1. 18 Feb, 2004 40 commits
    • 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
    • Andrew Morton's avatar
      [PATCH] md: Discard the cmd field from r1_bio structure · ebf7768e
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      The only time it is really needed is to differentiate a retry-on-fail from a
      write-after-read-for-resync request to raid1d.  So we use a bit in 'state'
      for that.
      ebf7768e
    • Andrew Morton's avatar
      [PATCH] md: Split read and write end_request handlers · c1dd448e
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      Instead of having a single end_request handler that must determine whether it
      was a read or a write request, we have two separate handlers, which makes
      each of them easier to follow.
      c1dd448e
    • Andrew Morton's avatar
      [PATCH] md: Print "deprecated" warning when START_ARRAY is used. · a2c4e506
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      The "START_ARRAY" ioctl depends on major/minor numbers (as stored in the raid
      superblock) are stable over reboots, which is increasingly untrue.
      
      There are better ways to start an array (e.g.  with mdadm) so we mark the
      ioctl as deprecated for 2.6, and will remove it in 2.7.
      a2c4e506
    • Andrew Morton's avatar
      [PATCH] kNFSd:fix build problems in nfs w/o proc_fs on 2.6.0-test5 · 67afcb4f
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      From: Stephen Hemminger <shemminger@osdl.org>
      Date: Fri, 12 Sep 2003 11:31:06 -0700
      
      NFS won't build w/o CONFIG_PROC_FS.  Looks like typo's (or a C++
      programmer) in stats.h
      67afcb4f
    • Andrew Morton's avatar
      [PATCH] kNFSd: convert NFS /proc interfaces to seq_file · 2a0807bd
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      From: shemminger@osdl.org Sat Sep  6 09:19:50 2003
      Date: Fri, 5 Sep 2003 16:19:30 -0700
      
      Converts /proc/net/rpc/nfs and /proc/net/rpc/nfsd to use the simpler
      seq_file interface.
      2a0807bd
    • Andrew Morton's avatar
      [PATCH] kNFSd: ip_map_init does a kmalloc which isn't checked... · bbcc5fa8
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      There is no way to return an error from a cache init routine, so instead we
      make sure to pre-allocate the memory needed, and free it after the lookup
      if the lookup failed.
      bbcc5fa8
    • Andrew Morton's avatar
      [PATCH] kNFSd: Allow sunrpc/svc cache init function to modify the "key" · 9417bd87
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      When adding a item to a sunrpc/svc cache that contains kmalloced data it is
      usefully to move the malloced data out of the key object into the new cache
      object rather than copying (as then we would need to cope with kmalloc
      failure and such).  This means modifying the original.
      
      If the kmalloced data forms part of the key, then we must not move the data
      out until after the key isn't needed any more.  So this patch moves the
      call to "INIT" on a new item (which fills in the key) to *after* the item
      has been found (or not), and also makes sure we only call the HASH function
      once.
      
      Thanks to "J.  Bruce Fields" <bfields@fieldses.org>
      
      also
      
       1/ remove unnecessary assignment
       2/ fix comments that lag behind implementation.
      9417bd87
    • Andrew Morton's avatar
      [PATCH] kNFSd: Fix possible scheduling_while_atomic in cache.c · 16b82dca
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      We currently call cache_put, which can schedule(), under a spin_lock.  This
      patch moves that call outside the spinlock.
      16b82dca
    • Andrew Morton's avatar
      [PATCH] #if versus #ifdef cleanup · c65febbb
      Andrew Morton authored
      From: Valdis.Kletnieks@vt.edu
      
      15 changes of #if to #ifdef and 2 places CONFIG_FOO should be
      defined(CONFIG_FOO).  This gets rid of spurious warnings if you build with
      "-Wundef" so you get a warning if you have a preprocessor command like:
      
      #if CONFIG_ETRAX_DS1302_RSTBIT == 27
      
      and you'll be told if it's substituting a zero rather than silent
      weirdness and unexpected code generation.
      c65febbb
    • Andrew Morton's avatar
      [PATCH] MIPS: New 2.6 serial drivers · b7df53b3
      Andrew Morton authored
      From: Ralf Baechle <ralf@linux-mips.org>
      
      Three new MIPS-specific serial drivers.  ip22.c is derived from the sparc
      zilog driver; guess we should write a generic Zilog driver somewhen ...
      b7df53b3