1. 19 May, 2004 40 commits
    • Andrew Morton's avatar
      [PATCH] s390: dasd driver · 1f5a9d4e
      Andrew Morton authored
      From: Martin Schwidefsky <schwidefsky@de.ibm.com>
      
      dasd device driver changes:
       - Reset pointer from ccw device to dasd_devmap on device removal.
      1f5a9d4e
    • Andrew Morton's avatar
      [PATCH] s390: core s390 · 4120bd78
      Andrew Morton authored
      From: Martin Schwidefsky <schwidefsky@de.ibm.com>
      
      s390 core changes:
       - Fix system call trace / audit interface.
       - Fix find_first_bit / find_next_bit inlines assembly constraints.
      4120bd78
    • Andrew Morton's avatar
      [PATCH] use-before-uninitialized value in ext3(2)_find_ goal · 83ee50f5
      Andrew Morton authored
      From: Mingming Cao <cmm@us.ibm.com>
      
      There is a uninitialized goal value being referenced in both ext3 and ext2
      find goal block functions (ext3_find_goal() and ext2_find_goal()).
      
      In the non-sequential write case, these functions check the goal value(non
      zero) before calling ext3(2)_find_near() to find the goal block to
      allocate.
      
      Since the goal value is uninitialized(non zero), the ext3(2)_find_near() is
      never being called in the non-sequential write, thus ext3(2)_find_goal()
      failed to guide a goal block in the random write case.
      
      ext3(2)_new_block() takes the junk goal value and will turn it to goal 0
      since it's normally beyond the filesystem block number limit.  The fix is
      trivial.
      83ee50f5
    • Andrew Morton's avatar
      [PATCH] Fix overzealous use of online cpu iterators · 2cb2f31f
      Andrew Morton authored
      From: Rusty Russell <rusty@rustcorp.com.au>
      
      The IA64 hotplug CPU merge seems to have included some core changes: in
      particular the recalc_bh_state() needs to sum for all (including offline)
      cpus, since we don't empty the counters on CPU down.  The totals printed by
      /proc/stat (the first loop) should include offline cpus, too (apparently
      printing out the per-cpu lines for offline cpus confuses top).
      2cb2f31f
    • Andrew Morton's avatar
      [PATCH] vga16fb-fix · 4a40d604
      Andrew Morton authored
      The recent ARM-specific fix broke ia32.  Hopefully the ARM team can find an
      arch-specific implementation of VGA_MAP_MEM() which makes it work.
      4a40d604
    • Andrew Morton's avatar
      [PATCH] VFS cache sizing fix for small machines · 227d8064
      Andrew Morton authored
      From: Matt Mackall <mpm@selenic.com>
      
      Doing the algebra:
      
      c = (a - b) * 3/2
      a' = a - c = a - 3/2(a - b) = (2a - 3a + 3b)/2 = (3b - a)/2
      a' >= 0
      3b - a >= 0
      3b >= a
      b >= a/3
      nr_free_pages() >= mempages/3
      
      We can indeed get into trouble if we try to load a large kernel on a very
      small box (ie kernel reserves more than 2/3 of usable memory).  Surprisingly I
      haven't hit this, but here's a fix.
      227d8064
    • Andrew Morton's avatar
      [PATCH] svc_recv() fix · c0b5943f
      Andrew Morton authored
      From: "J. Bruce Fields" <bfields@fieldses.org>
      
      svc_recv may call svc_sock_release before rqstp->rq_res is initialized.
      c0b5943f
    • Andrew Morton's avatar
      [PATCH] kNFSd: Add a warning when upcalls fail, · eeb6f17b
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      From: "J. Bruce Fields" <bfields@fieldses.org>
      
      To help the user diagnose problems caused by user-level daemons not running.
      eeb6f17b
    • Andrew Morton's avatar
      [PATCH] kNFSd: Remove check on number of threads waiting on user-space. · 95321936
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      From: "J. Bruce Fields" <bfields@fieldses.org>
      
      Currently we are counting the number of threads already asleep and returning
      an immediate NFS4ERR_DELAY (==JUKEBOX) error if more than half are already
      asleep.
      
      This patch removes that logic, so instead we only return NFS4ERR_DELAY if an
      upcall times out (if it takes more than a second to return).
      
      With the thread counting there is the risk that even when all the relevant
      subsystems are responsive, the client may still see occasional NFS4ERR_DELAY
      returns just because, by coincidence, several upcalls were initiated at the
      same time.  I expect clients will delay several seconds before retrying after
      NFS4ERR_DELAY, so this will be quite noticeable to users.  Sporadic long
      delays like this are likely to lead users to suspect a problem somewhere, when
      in fact there is none.
      
      The current scheme ensures that we can still process requests not depending on
      upcalls, even when all threads would otherwise be tied up waiting on upcalls. 
      However, this is not something that should happen under normal circumstances;
      if a server spends a significant portion of its time with all threads waiting
      for upcalls, this a sign that something is seriously wrong.
      
      In such a circumstance (e.g., an ldap server dies), we can, at least, bound
      the waiting time to a second without the need for counting threads.
      
      In short, removing the thread-counting will allow us to behave predictably
      when things are working, while still allowing some progress when they don't.
      
      It would be a worthwhile project to measure the amount of time threads spend
      waiting for upcalls (or for reads, for that matter); if a significant portion
      of the time they spend handling requests is spent sleeping, then there's an
      opportunity to improve nfsd performance: if we can break the one-to-one
      mapping between requests and threads, then we can lower the number of threads
      required to keep the nfs server busy.
      
      However, both the currently available options for doing this are problematic:
      returning JUKEBOX/DELAY errors at random times will lead to unpredictable
      performance, and saving a copy of the request to be processed from scratch
      again later is wasteful and makes it difficult to provide correct semantics,
      especially in the NFSv4 case.
      
      So for now I believe waits with short timeouts are the best option.
      95321936
    • Andrew Morton's avatar
      [PATCH] kNFSd: Reduce timeout when waiting for idmapper userspace daemon. · 5eb098e2
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      From: "J. Bruce Fields" <bfields@fieldses.org>
      
      1 second should be plenty of time; if we're going to take longer than that
      it's probably better just to return NFS4ERR_DELAY and let the client retry
      anyway.
      5eb098e2
    • Andrew Morton's avatar
      [PATCH] kNFSd: Improve idmapper behaviour on failure. · 74d88830
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      From: "J. Bruce Fields" <bfields@fieldses.org>
      
      Slightly better behavior on failed mapping (which may happen either because
      idmapd is not running, or because there it has told us it doesn't know the
      mapping.):
      
      	on name->id (setattr), return BADNAME.  (I used ESRCH to
      		communicate BADNAME, just because it was the first error in
      		include/asm-generic/errno-base.h that had something to
      		do with nonexistance of something, and that we weren't
      		already using.)
      
      	id->name (getattr), return a string representation of the numerical
      		id.  This is probably useless to the client, especially
      		since we're unlikely to accept such a string on a setattr,
      		but perhaps some client will find it mildly helpful.
      74d88830
    • Andrew Morton's avatar
      [PATCH] kNFSd: Fix race conditions in idmapper · 63b60615
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      From: "J. Bruce Fields" <bfields@fieldses.org>
      
      Also fix leaks on error; split up code a bit to make it easier to verify
      correctness.
      63b60615
    • Andrew Morton's avatar
      [PATCH] kNFSd: Protect reference to exp across calls to nfsd_cross_mnt · 8dfec5a1
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      nfsd_cross_mnt can release the reference to the passed svc_export structure
      when it returns a different svc_export structure.  So we need to make sure we
      have a counted reference before, and drop the reference afterwards.
      8dfec5a1
    • Andrew Morton's avatar
      [PATCH] kNFSd: Change fh_compose to NOT consume a reference to the dentry. · a1de7361
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      fh_compose currently consumes a reference to the dentry but not the export
      point.  This is both inconsistent and confusing.
      
      It is better if a routine like this doesn't consume reference points, so with
      this patch, it doesn't.  This fixes a couple of very subtle and unusual
      reference counting errors.
      a1de7361
    • Andrew Morton's avatar
      [PATCH] kNFSd: Allow larger writes to sunrpc/svc caches. · 4fc69688
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      We currently serialize all writes to these caches with queue_io_sem, so we
      only needed one buffer.
      
      There is some need for larger-than-one-page writes, so we can just statically
      allocate a buffer.
      4fc69688
    • Andrew Morton's avatar
      [PATCH] kNFSd: Make sure CACHE_NEGATIVE is cleared when a cache entry is updates. · 00979a9f
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      This is important for update-in-place caches which may change from being
      negative to posative.
      
      Thanks to "J.  Bruce Fields" <bfields@fieldses.org> and Olaf Kirch
      <okir@suse.de>
      00979a9f
    • Andrew Morton's avatar
      [PATCH] kNFSd: Use correct _bh locking on sv_lock. · fb4bb3a0
      Andrew Morton authored
      From: NeilBrown <neilb@cse.unsw.edu.au>
      
      With the _bh, we can deadlock.
      fb4bb3a0
    • Andrew Morton's avatar
      [PATCH] initialise mca_bus_type even if !MCA_bus · 64e67fb0
      Andrew Morton authored
      From: "Randy.Dunlap" <rddunlap@osdl.org>
      
      We need to call mca_system_init() to register MCA bus struct, otherwise
      find_mca_adapter() oopses with a NULL ptr dereference.
      
      Fixes this oops reported last week:
      	http://marc.theaimsgroup.com/?l=linux-kernel&m=108455738606747&w=2
      
      Thanks to James Bottomley for pointing this out.
      64e67fb0
    • Andrew Morton's avatar
      [PATCH] drivers/cdrom/aztcd.c warning fix. · a856abc9
      Andrew Morton authored
      From: "Luiz Fernando N. Capitulino" <lcapitulino@prefeitura.sp.gov.br>
      
      drivers/cdrom/azctd.c:379: warning: `pa_ok' defined but not used
      a856abc9
    • Andrew Morton's avatar
      [PATCH] do_generic_mapping_read() cleanup · 6eb8058f
      Andrew Morton authored
      We just tested the page's uptodateness, no point in doing it again.
      6eb8058f
    • Andrew Morton's avatar
      [PATCH] efivars: add MODULE_VERSION, remove unnecessary check in exit · 54a50867
      Andrew Morton authored
      From: Matt Domsch <Matt_Domsch@dell.com>
      
      * Adds MODULE_VERSION
      
      * Remove check for efi_enabled in efivars_exit() - we aborted module load at
        init based on this already.
      54a50867
    • Andrew Morton's avatar
      [PATCH] EDD: remove unused SCSI header files · 17b62a72
      Andrew Morton authored
      From: Matt Domsch <Matt_Domsch@dell.com>
      
      EDD: Remove no longer needed SCSI header file inclusion.
      
      Thanks to ArjanV for reminding me.
      17b62a72
    • Andrew Morton's avatar
      [PATCH] SubmittingDrivers completeness · dc4ed52a
      Andrew Morton authored
      From: Jonathan Corbet <corbet@lwn.net>
      
      I noticed a patch went in to Documentation/SubmittingDrivers which tweaked
      the URL for KernelTraffic.  Here's a self-serving patch which makes that
      section more complete; to be fair, I added two other sites too.  Just in
      case it's useful.
      dc4ed52a
    • Andrew Morton's avatar
      [PATCH] Quota fix 3 - quota file corruption · e69c0c55
      Andrew Morton authored
      From: Jan Kara <jack@ucw.cz>
      
      This patch fixes possible quota files corruption which could happen when root
      did not have any inodes&space allocated.
      
      Originally this could not happen as structure would not be written to disk in
      that case but with journalled quota we need to write even all-zero structure. 
      The fix is not very nice but change of the format on disk is probably worse (I
      made a mistake with not including the usage-bitmaps into format :().
      e69c0c55
    • Andrew Morton's avatar
      [PATCH] SELinux: fix error handling in selinuxfs · cfeff004
      Andrew Morton authored
      From: Stephen Smalley <sds@epoch.ncsc.mil>
      
      This patch against 2.6.6 fixes error handling for two out-of-memory conditions
      in selinuxfs, avoiding potential deadlock due to returning without releasing a
      semaphore.  The patch was submitted by Karl MacMillan of Tresys.
      cfeff004
    • Andrew Morton's avatar
      [PATCH] correct ps2esdi module parm name · 5187778f
      Andrew Morton authored
      From: "Randy.Dunlap" <rddunlap@osdl.org>
      
      The module parameter name is incorrect (looks like a thinko).
      5187778f
    • Andrew Morton's avatar
      [PATCH] Subject: [PATCH] kbuild SUBDIRS="more/ than/ one/" · 4da35e71
      Andrew Morton authored
      From: Andreas Gruenbacher <agruen@suse.de>
      
      Here is a patch that re-adds support for more than one directory in SUBDIRS.
      We have a number of packages that use this.
      
      The FORCE dependency of crmodverdir seems unnecessary; removing.
      
      (acked by Sam)
      4da35e71
    • Andrew Morton's avatar
      [PATCH] mark the `planb' video driver broken · e6d0a0a2
      Andrew Morton authored
      From: Christoph Hellwig <hch@lst.de>
      
      This one is missing updates from the v4l1 interfaces in 2.4 to the 2.6ish
      v4l2 and thus doesn't compile.  While we're at it also remove the
      MOD_{INC,DEC}_USE_COUNT calls in it that were bogus even in 2.4 to avoid
      false positives in grep.
      e6d0a0a2
    • Andrew Morton's avatar
      [PATCH] don't mention MOD_INC_USE_COUNT/MOD_DEC_USE_COUNT in docs · 96595459
      Andrew Morton authored
      From: Christoph Hellwig <hch@lst.de>
      
      If we want new drivers to not use obsolete interfaces we're better off not
      mentioning it in the documentation.
      96595459
    • Andrew Morton's avatar
      [PATCH] replace MOD_INC_USE_COUNT in cyber2000fb · 00541475
      Andrew Morton authored
      From: Christoph Hellwig <hch@lst.de>
      
      This driver is unloadable for the pci case, but not if vlb cards are found so
      we can't use the module_exit removal to lock it into memory.
      
      Replace the MOD_INC_USE_COUNT with __module_get in it's module_init routine.
      00541475
    • Andrew Morton's avatar
      [PATCH] Remove blk_run_queues() remnants · e229be85
      Andrew Morton authored
      It no longer exists.
      e229be85
    • Andrew Morton's avatar
      [PATCH] fore200e.c warning fix · ccee748e
      Andrew Morton authored
      drivers/atm/fore200e.c: In function `fore200e_close':
      drivers/atm/fore200e.c:1659: warning: use of cast expressions as lvalues is deprecated
      ccee748e
    • Andrew Morton's avatar
      [PATCH] reserve syscall slots for kexec · c450028f
      Andrew Morton authored
      From: "Randy.Dunlap" <rddunlap@osdl.org>
      
      kexec is a fairly major and popular feature.  People are shipping it in
      products, although it is not known if Linux distributors plan to ship it.
      
      The patch reserves the kexec syscall slots to pin the ABI down for
      everyone.
      
      
      - add kexec_load prototype to syscalls.h
      
      - add LINUX_REBOOT_CMD_KEXEC to reboot.h
      
      - add kexec_load syscall for ia32, ia64, x86_64, ppc32, ppc64
      c450028f
    • Andrew Morton's avatar
      [PATCH] Fix for Makefiles to get KBUILD_OUTPUT working · d06d15d2
      Andrew Morton authored
      From: Mathieu Chouquet-Stringer <mchouque@online.fr>
      
      If you use O=/someotherdir or KBUILD_OUTPUT=/someotherdir on the following
      architectures: alpha, mips, sh and cris, the build process is probably
      going to fail at one point or another, depending on the target you used,
      because make can't find scripts/Makefile.build or scripts/Makefile.clean.
      
      The following patch fixes this, I greped the whole tree and these four were
      the only "offenders" I found.
      d06d15d2
    • Andrew Morton's avatar
      [PATCH] BeFS MAINTAINERS update · 64fa9f96
      Andrew Morton authored
      From: "Sergey S. Kostyliov" <rathamahata@php4.ru>
      64fa9f96
    • Andrew Morton's avatar
      [PATCH] Work around gcc 3.3.3-hammer sched miscompilation on x86-64 · 05d2b90d
      Andrew Morton authored
      From: Andi Kleen <ak@muc.de>
      
      The new domain scheduler got miscompiled on x86-64 with gcc 3.3.3-hammer,
      which is shipping with some distributions.  The kernel deadlocks eventually
      under light stress on SMP systems with the right options.
      
      After some experiments it seems this simple change avoids the
      miscompilation.  It also doesn't pessimize the code unduly for other
      architectures.
      05d2b90d
    • Andrew Morton's avatar
      [PATCH] slab: add kmem_cache_alloc_node · 68978ee7
      Andrew Morton authored
      From: Manfred Spraul <manfred@colorfullife.com>
      
      The attached patch adds a simple kmem_cache_alloc_node function: allocate
      memory on a given node.  The function is intended for cpu bound structures.
       It's used for alloc_percpu and for the slab-internal per-cpu structures.
      Jack Steiner reported a ~3% performance increase for AIM7 on a 64-way
      Itanium 2.
      
      Port maintainers: The patch could cause problems if CPU_UP_PREPARE is
      called for a cpu on a node before the corresponding memory is attached
      and/or if alloc_pages_node doesn't fall back to memory from another node if
      there is no memory in the requested node.  I think noone does that, but I'm
      not sure.
      68978ee7
    • Andrew Morton's avatar
      [PATCH] slab: allow arch override for kmem_bufctl_t · a3e754c2
      Andrew Morton authored
      From: Manfred Spraul <manfred@colorfullife.com>
      
      The slab allocator keeps track of the free objects in a slab with a linked
      list of integers (typedef'ed to kmem_bufctl_t).  Right now unsigned int is
      used for kmem_bufctl_t, i.e.  4 bytes per-object overhead.
      
      The attached patch implements a per-arch definition of for this type:
      Theoretically, unsigned short is sufficient for kmem_bufctl_t and this would
      reduce the per-object overhead to 2 bytes.  But some archs cannot operate on
      16-bit values efficiently, thus it's not possible to switch everyone to
      ushort.
      
      The chosen types are a result of dicussions with the various arch maintainers.
      a3e754c2
    • Andrew Morton's avatar
      [PATCH] slab: enable runtime cache line size on i386 · 897d49be
      Andrew Morton authored
      From: Manfred Spraul <manfred@colorfullife.com>
      
      the attached patch switches the SLAB_HWCACHE_ALIGN alignment from the
      compile time L1 cache line size to the runtime detected value for i386. 
      x86-64 already uses the runtime detection.
      897d49be
    • Andrew Morton's avatar
      [PATCH] Fix arithmetic in shrink_zone() · 6fa1d901
      Andrew Morton authored
      From: Nick Piggin <nickpiggin@yahoo.com.au>
      
      If the zone has a very small number of inactive pages, local variable
      `ratio' can be huge and we do way too much scanning.  So much so that Ingo
      hit an NMI watchdog expiry, although that was because the zone would have a
      had a single refcount-zero page in it, and that logic recently got fixed up
      via get_page_testone().
      
      Nick's patch simply puts a sane-looking upper bound on the number of pages
      which we'll scan in this round.
      
      
      It fixes another failure case: if the inactive list becomes very small
      compared to the size of the active list, active list scanning (and therefore
      inactive list refilling) also becomes small.
      
      This patch causes inactive list scanning to be keyed off the size of the
      active+inactive lists.  It has the plus of hiding active and inactive
      balancing implementation from the higher level scanning code.  It will
      slightly change other aspects of scanning behaviour, but probably not
      significantly.
      6fa1d901