1. 12 Dec, 2009 1 commit
  2. 26 Nov, 2009 1 commit
    • Ilya Loginov's avatar
      block: add helpers to run flush_dcache_page() against a bio and a request's pages · 2d4dc890
      Ilya Loginov authored
      
      
      Mtdblock driver doesn't call flush_dcache_page for pages in request.  So,
      this causes problems on architectures where the icache doesn't fill from
      the dcache or with dcache aliases.  The patch fixes this.
      
      The ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE symbol was introduced to avoid
      pointless empty cache-thrashing loops on architectures for which
      flush_dcache_page() is a no-op.  Every architecture was provided with this
      flush pages on architectires where ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE is
      equal 1 or do nothing otherwise.
      
      See "fix mtd_blkdevs problem with caches on some architectures" discussion
      on LKML for more information.
      Signed-off-by: default avatarIlya Loginov <isloginov@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: David Woodhouse <dwmw2@infradead.org>
      Cc: Peter Horton <phorton@bitbox.co.uk>
      Cc: "Ed L. Cashin" <ecashin@coraid.com>
      Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
      2d4dc890
  3. 12 Oct, 2009 1 commit
    • Neil Horman's avatar
      net: Generalize socket rx gap / receive queue overflow cmsg · 3b885787
      Neil Horman authored
      Create a new socket level option to report number of queue overflows
      
      Recently I augmented the AF_PACKET protocol to report the number of frames lost
      on the socket receive queue between any two enqueued frames.  This value was
      exported via a SOL_PACKET level cmsg.  AFter I completed that work it was
      requested that this feature be generalized so that any datagram oriented socket
      could make use of this option.  As such I've created this patch, It creates a
      new SOL_SOCKET level option called SO_RXQ_OVFL, which when enabled exports a
      SOL_SOCKET level cmsg that reports the nubmer of times the sk_receive_queue
      overflowed between any two given frames.  It also augments the AF_PACKET
      protocol to take advantage of this new feature (as it previously did not touch
      sk->sk_drops, which this patch uses to record the overflow count).  Tested
      successfully by me.
      
      Notes:
      
      1) Unlike my previous patch, this patch simply records the sk_drops value, which
      is not a number of drops between packets, but rather a total number of drops.
      Deltas must be computed in user space.
      
      2) While this patch currently works with datagram oriented protocols, it will
      also be accepted by non-datagram oriented protocols. I'm not sure if thats
      agreeable to everyone, but my argument in favor of doing so is that, for those
      protocols which aren't applicable to this option, sk_drops will always be zero,
      and reporting no drops on a receive queue that isn't used for those
      non-participating protocols seems reasonable to me.  This also saves us having
      to code in a per-protocol opt in mechanism.
      
      3) This applies cleanly to net-next assuming that commit
      97775007
      
       (my af packet cmsg patch) is reverted
      Signed-off-by: default avatarNeil Horman <nhorman@tuxdriver.com>
      Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      3b885787
  4. 22 Sep, 2009 2 commits
  5. 01 Sep, 2009 1 commit
  6. 31 Aug, 2009 1 commit
  7. 05 Aug, 2009 2 commits
    • Jan Engelhardt's avatar
      net: implement a SO_DOMAIN getsockoption · 0d6038ee
      Jan Engelhardt authored
      
      
      This sockopt goes in line with SO_TYPE and SO_PROTOCOL. It makes it
      possible for userspace programs to pass around file descriptors — I
      am referring to arguments-to-functions, but it may even work for the
      fd passing over UNIX sockets — without needing to also pass the
      auxiliary information (PF_INET6/IPPROTO_TCP).
      Signed-off-by: default avatarJan Engelhardt <jengelh@medozas.de>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0d6038ee
    • Jan Engelhardt's avatar
      net: implement a SO_PROTOCOL getsockoption · 49c794e9
      Jan Engelhardt authored
      
      
      Similar to SO_TYPE returning the socket type, SO_PROTOCOL allows to
      retrieve the protocol used with a given socket.
      
      I am not quite sure why we have that-many copies of socket.h, and why
      the values are not the same on all arches either, but for where hex
      numbers dominate, I use 0x1029 for SO_PROTOCOL as that seems to be
      the next free unused number across a bunch of operating systems, or
      so Google results make me want to believe. SO_PROTOCOL for others
      just uses the next free Linux number, 38.
      Signed-off-by: default avatarJan Engelhardt <jengelh@medozas.de>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      49c794e9
  8. 27 Jul, 2009 1 commit
    • Benjamin Herrenschmidt's avatar
      mm: Pass virtual address to [__]p{te,ud,md}_free_tlb() · 9e1b32ca
      Benjamin Herrenschmidt authored
      
      
      mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()
      
      Upcoming paches to support the new 64-bit "BookE" powerpc architecture
      will need to have the virtual address corresponding to PTE page when
      freeing it, due to the way the HW table walker works.
      
      Basically, the TLB can be loaded with "large" pages that cover the whole
      virtual space (well, sort-of, half of it actually) represented by a PTE
      page, and which contain an "indirect" bit indicating that this TLB entry
      RPN points to an array of PTEs from which the TLB can then create direct
      entries. Thus, in order to invalidate those when PTE pages are deleted,
      we need the virtual address to pass to tlbilx or tlbivax instructions.
      
      The old trick of sticking it somewhere in the PTE page struct page sucks
      too much, the address is almost readily available in all call sites and
      almost everybody implemets these as macros, so we may as well add the
      argument everywhere. I added it to the pmd and pud variants for consistency.
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      Acked-by: David Howells <dhowells@redhat.com> [MN10300 & FRV]
      Acked-by: default avatarNick Piggin <npiggin@suse.de>
      Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> [s390]
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      9e1b32ca
  9. 10 Jul, 2009 1 commit
  10. 24 Jun, 2009 1 commit
  11. 17 Jun, 2009 1 commit
    • Randy Dunlap's avatar
      kmap_types: make most arches use generic header file · e4c9dd0f
      Randy Dunlap authored
      
      
      Convert most arches to use asm-generic/kmap_types.h.
      
      Move the KM_FENCE_ macro additions into asm-generic/kmap_types.h,
      controlled by __WITH_KM_FENCE from each arch's kmap_types.h file.
      
      Would be nice to be able to add custom KM_types per arch, but I don't yet
      see a nice, clean way to do that.
      
      Built on x86_64, i386, mips, sparc, alpha(tonyb), powerpc(tonyb), and
      68k(tonyb).
      
      Note: avr32 should be able to remove KM_PTE2 (since it's not used) and
      then just use the generic kmap_types.h file.  Get avr32 maintainer
      approval.
      Signed-off-by: default avatarRandy Dunlap <randy.dunlap@oracle.com>
      Cc: <linux-arch@vger.kernel.org>
      Acked-by: default avatarMike Frysinger <vapier@gentoo.org>
      Cc: Richard Henderson <rth@twiddle.net>
      Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
      Cc: Bryan Wu <cooloney@kernel.org>
      Cc: Mikael Starvik <starvik@axis.com>
      Cc: Hirokazu Takata <takata@linux-m32r.org>
      Cc: "Luck Tony" <tony.luck@intel.com>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Kyle McMartin <kyle@mcmartin.ca>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Paul Mundt <lethal@linux-sh.org>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      e4c9dd0f
  12. 11 Jun, 2009 4 commits
  13. 10 Jun, 2009 1 commit
  14. 08 Jun, 2009 1 commit
  15. 28 Apr, 2009 1 commit
  16. 07 Apr, 2009 1 commit
  17. 03 Apr, 2009 1 commit
  18. 02 Mar, 2009 1 commit
  19. 16 Feb, 2009 1 commit
    • Patrick Ohly's avatar
      net: new user space API for time stamping of incoming and outgoing packets · cb9eff09
      Patrick Ohly authored
      
      
      User space can request hardware and/or software time stamping.
      Reporting of the result(s) via a new control message is enabled
      separately for each field in the message because some of the
      fields may require additional computation and thus cause overhead.
      User space can tell the different kinds of time stamps apart
      and choose what suits its needs.
      
      When a TX timestamp operation is requested, the TX skb will be cloned
      and the clone will be time stamped (in hardware or software) and added
      to the socket error queue of the skb, if the skb has a socket
      associated with it.
      
      The actual TX timestamp will reach userspace as a RX timestamp on the
      cloned packet. If timestamping is requested and no timestamping is
      done in the device driver (potentially this may use hardware
      timestamping), it will be done in software after the device's
      start_hard_xmit routine.
      Signed-off-by: default avatarPatrick Ohly <patrick.ohly@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      cb9eff09
  20. 15 Jan, 2009 2 commits
  21. 06 Jan, 2009 1 commit
  22. 03 Jan, 2009 1 commit
  23. 13 Dec, 2008 1 commit
    • Rusty Russell's avatar
      cpumask: centralize cpu_online_map and cpu_possible_map · 98a79d6a
      Rusty Russell authored
      
      
      Impact: cleanup
      
      Each SMP arch defines these themselves.  Move them to a central
      location.
      
      Twists:
      1) Some archs (m32, parisc, s390) set possible_map to all 1, so we add a
         CONFIG_INIT_ALL_POSSIBLE for this rather than break them.
      
      2) mips and sparc32 '#define cpu_possible_map phys_cpu_present_map'.
         Those archs simply have phys_cpu_present_map replaced everywhere.
      
      3) Alpha defined cpu_possible_map to cpu_present_map; this is tricky
         so I just manipulate them both in sync.
      
      4) IA64, cris and m32r have gratuitous 'extern cpumask_t cpu_possible_map'
         declarations.
      Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
      Reviewed-by: default avatarGrant Grundler <grundler@parisc-linux.org>
      Tested-by: default avatarTony Luck <tony.luck@intel.com>
      Acked-by: default avatarIngo Molnar <mingo@elte.hu>
      Cc: Mike Travis <travis@sgi.com>
      Cc: ink@jurassic.park.msu.ru
      Cc: rmk@arm.linux.org.uk
      Cc: starvik@axis.com
      Cc: tony.luck@intel.com
      Cc: takata@linux-m32r.org
      Cc: ralf@linux-mips.org
      Cc: grundler@parisc-linux.org
      Cc: paulus@samba.org
      Cc: schwidefsky@de.ibm.com
      Cc: lethal@linux-sh.org
      Cc: wli@holomorphy.com
      Cc: davem@davemloft.net
      Cc: jdike@addtoit.com
      Cc: mingo@redhat.com
      98a79d6a
  24. 29 Oct, 2008 1 commit