)]}'
{
  "log": [
    {
      "commit": "8e3e076c5a78519a9f64cd384e8f18bc21882ce0",
      "tree": "f032258fde3aa4771e86bf4552fe4530c221dec3",
      "parents": [
        "00b41ec2611dc98f87f30753ee00a53db648d662"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat May 10 20:58:02 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat May 10 20:58:02 2008 -0700"
      },
      "message": "BKL: revert back to the old spinlock implementation\n\nThe generic semaphore rewrite had a huge performance regression on AIM7\n(and potentially other BKL-heavy benchmarks) because the generic\nsemaphores had been rewritten to be simple to understand and fair.  The\nlatter, in particular, turns a semaphore-based BKL implementation into a\nmess of scheduling.\n\nThe attempt to fix the performance regression failed miserably (see the\nprevious commit 00b41ec2611dc98f87f30753ee00a53db648d662 \u0027Revert\n\"semaphore: fix\"\u0027), and so for now the simple and sane approach is to\ninstead just go back to the old spinlock-based BKL implementation that\nnever had any issues like this.\n\nThis patch also has the advantage of being reported to fix the\nregression completely according to Yanmin Zhang, unlike the semaphore\nhack which still left a couple percentage point regression.\n\nAs a spinlock, the BKL obviously has the potential to be a latency\nissue, but it\u0027s not really any different from any other spinlock in that\nrespect.  We do want to get rid of the BKL asap, but that has been the\nplan for several years.\n\nThese days, the biggest users are in the tty layer (open/release in\nparticular) and Alan holds out some hope:\n\n  \"tty release is probably a few months away from getting cured - I\u0027m\n   afraid it will almost certainly be the very last user of the BKL in\n   tty to get fixed as it depends on everything else being sanely locked.\"\n\nso while we\u0027re not there yet, we do have a plan of action.\n\nTested-by: Yanmin Zhang \u003cyanmin_zhang@linux.intel.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Andi Kleen \u003candi@firstfloor.org\u003e\nCc: Matthew Wilcox \u003cmatthew@wil.cx\u003e\nCc: Alexander Viro \u003cviro@ftp.linux.org.uk\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "860f7be283f8b8d7830a741cb72338057a753283",
      "tree": "26c70c1f599cab2499d2f6a83582c08974120007",
      "parents": [
        "1a823ac9ff09cbdf39201df37b7ede1f9395de83"
      ],
      "author": {
        "name": "David Howells",
        "email": "dhowells@redhat.com",
        "time": "Sat Feb 23 15:23:28 2008 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@woody.linux-foundation.org",
        "time": "Sat Feb 23 17:12:13 2008 -0800"
      },
      "message": "MN10300: define HZ as a config option\n\nDefine HZ as a config option.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "b920de1b77b72ca9432ac3f97edb26541e65e5dd",
      "tree": "40fa9be1470e929c47927dea7eddf184c0204229",
      "parents": [
        "ef3d534754f31fed9c3b976fee1ece1b3bc38282"
      ],
      "author": {
        "name": "David Howells",
        "email": "dhowells@redhat.com",
        "time": "Fri Feb 08 04:19:31 2008 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@woody.linux-foundation.org",
        "time": "Fri Feb 08 09:22:30 2008 -0800"
      },
      "message": "mn10300: add the MN10300/AM33 architecture to the kernel\n\nAdd architecture support for the MN10300/AM33 CPUs produced by MEI to the\nkernel.\n\nThis patch also adds board support for the ASB2303 with the ASB2308 daughter\nboard, and the ASB2305.  The only processor supported is the MN103E010, which\nis an AM33v2 core plus on-chip devices.\n\n[akpm@linux-foundation.org: nuke cvs control strings]\nSigned-off-by: Masakazu Urade \u003curade.masakazu@jp.panasonic.com\u003e\nSigned-off-by: Koichi Yasutake \u003cyasutake.koichi@jp.panasonic.com\u003e\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    }
  ]
}