1. 12 Mar, 2004 40 commits
    • James Bottomley's avatar
      [PATCH] add device quiescing to the SCSI API · 47b243df
      James Bottomley authored
      This patch adds the ability to quiesce a SCSI device.  The idea is that
      user issued commands (including filesystem ones) would get blocked,
      while mid-layer and device issued ones would be allowed to proceed.
      This is for things like Domain Validation which like to operate on an
      otherwise quiet device.
      
      There is one big change: to get all of this to happen correctly,
      scsi_do_req() has to queue on the *head* of the request queue, not the
      tail as it was doing previously.  The reason is that deferred requests
      block the queue, so anything needing executing after a deferred request
      has to go in front of it.  I don't think there are any untoward
      consequences of this.
      47b243df
    • Mark Haverkamp's avatar
      [PATCH] add adapter support to aacraid driver (update) · 6689060c
      Mark Haverkamp authored
      Mark S. said that there was another adapter added, and that they changed
      the names of some boards.  Here is the updated version.
      6689060c
    • Matthew Wilcox's avatar
      [PATCH] sym2 2.1.18i · c4d4a3a5
      Matthew Wilcox authored
       - Correct a typo "mvram" -> "nvram".
       - Re-do the PQS/PDS support which I'd #if 0 out.  Should even work on
         multiple-domain boxes now ;-)
       - Move all the nvram definitions to sym_nvram.h (from Gerard's 2.1.19-pre3)
       - hcb_p -> struct sym_hcb *
       - sdev_p -> struct sym_device *
       - Delete a lot of unused macros from sym_misc.h
       - Move READ_BARRIER and WRITE_BARRIER definitions to sym_glue.h
       - SYM_CONF_NVRAM_WRITE_SUPPORT (from Gerard's 2.1.19-pre3).  Not enabled
         yet.
       - Fix some -W warnings (some courtesy of Adrian Bunk).
      c4d4a3a5
    • Mark Haverkamp's avatar
      [PATCH] aacraid driver patch · cf088cda
      Mark Haverkamp authored
      I submitted a patch last month for the aacraid driver's reset handler.
      I left out setting function pointers in the adapter_ops structure for
      the adapter_check_health element.
      cf088cda
    • James Bottomley's avatar
      MPT Fusion driver 3.01.01 update · 33d15a8b
      James Bottomley authored
      From: 	Moore, Eric Dean <Emoore@lsil.com>
      
      This is an update for the MPT Fusion drivers 2.6 kernel.
      Version 3.01.01.
      
      This is a fix for poor performance in RAID Volumes. 
      The dvStatus was being cleared for hidden physical disks
      when mptscsih_slave_destroy is called.
      
      Also, I have fixed the warning comming from mptscsih_reset_timeouts.
      33d15a8b
    • Linus Torvalds's avatar
      Merge bk://gkernel.bkbits.net/libata-2.5 · a8b828f4
      Linus Torvalds authored
      into ppc970.osdl.org:/home/torvalds/v2.5/linux
      a8b828f4
    • Jeff Garzik's avatar
      Merge redhat.com:/spare/repo/linux-2.5 · 3f9d4e0f
      Jeff Garzik authored
      into redhat.com:/spare/repo/libata-2.5
      3f9d4e0f
    • Linus Torvalds's avatar
      Merge bk://kernel.bkbits.net/jgarzik/netconsole-2.5 · 2d0512a4
      Linus Torvalds authored
      into ppc970.osdl.org:/home/torvalds/v2.5/linux
      2d0512a4
    • Jeff Garzik's avatar
      Merge redhat.com:/spare/repo/netdev-2.6/netpoll · 9277cf69
      Jeff Garzik authored
      into redhat.com:/spare/repo/netconsole-2.5
      9277cf69
    • Jeff Garzik's avatar
      Add Promise SX8 (carmel) block driver. · 4061c061
      Jeff Garzik authored
      4061c061
    • Linus Torvalds's avatar
      Merge bk://gkernel.bkbits.net/prism54-2.5 · 4d92fbee
      Linus Torvalds authored
      into ppc970.osdl.org:/home/torvalds/v2.5/linux
      4d92fbee
    • Jeff Garzik's avatar
      0c1e7e8e
    • Jeff Garzik's avatar
      [wireless] Add new Prism54 wireless driver. · 8eae4cbf
      Jeff Garzik authored
      8eae4cbf
    • Linus Torvalds's avatar
      Merge bk://linux-scsi.bkbits.net/scsi-for-linus-2.6 · aba7eead
      Linus Torvalds authored
      into ppc970.osdl.org:/home/torvalds/v2.5/linux
      aba7eead
    • Linus Torvalds's avatar
      Merge http://lia64.bkbits.net/to-linus-2.5 · 60059a51
      Linus Torvalds authored
      into ppc970.osdl.org:/home/torvalds/v2.5/linux
      60059a51
    • Linus Torvalds's avatar
      Revert attribute_used changes in module.h. They were wrong. · dede844e
      Linus Torvalds authored
      Cset exclude: akpm@osdl.org|ChangeSet|20040312161945|47751
      dede844e
    • Andrew Morton's avatar
      [PATCH] slab: avoid higher-order allocations · 29d18b52
      Andrew Morton authored
      From: Manfred Spraul <manfred@colorfullife.com>
      
      At present slab is using 2-order allocations for the size-2048 cache.  Of
      course, this can affect networking quite seriously.
      
      The patch ensures that slab will never use more than a 1-order allocation
      for objects which have a size of less than 2*PAGE_SIZE.
      29d18b52
    • Andrew Morton's avatar
      [PATCH] vmscan: add lru_to_page() helper · 349055d0
      Andrew Morton authored
      From: Nick Piggin <piggin@cyberone.com.au>
      
      Add a little helper macro for a common list extraction operation in vmscan.c
      349055d0
    • Andrew Morton's avatar
      [PATCH] vm: balance inactive zone refill rates · fb5b4abe
      Andrew Morton authored
      The current refill logic in refill_inactive_zone() takes an arbitrarily large
      number of pages and chops it down to SWAP_CLUSTER_MAX*4, regardless of the
      size of the zone.
      
      This has the effect of reducing the amount of refilling of large zones
      proportionately much more than of small zones.
      
      We made this change in may 2003 and I'm damned if I remember why.  let's put
      it back so we don't truncate the refill count and see what happens.
      fb5b4abe
    • Andrew Morton's avatar
      [PATCH] fix vm-batch-inactive-scanning.patch · 07a25779
      Andrew Morton authored
      - prevent nr_scan_inactive from going negative
      
      - compare `count' with SWAP_CLUSTER_MAX, not `max_scan'
      
      - Use ">= SWAP_CLUSTER_MAX", not "> SWAP_CLUSTER_MAX".
      07a25779
    • Andrew Morton's avatar
      [PATCH] vmscan: batch up inactive list scanning work · ceb37d32
      Andrew Morton authored
      From: Nick Piggin <piggin@cyberone.com.au>
      
      Use a "refill_counter" for inactive list scanning, similar to the one used
      for active list scanning.  This batches up scanning now that we precisely
      balance ratios, and don't round up the amount to be done.
      
      No observed benefits, but I imagine it would lower the acquisition
      frequency of the lru locks in some cases, and make codepaths more efficient
      in general due to cache niceness.
      ceb37d32
    • Andrew Morton's avatar
      [PATCH] vmscan: less throttling of page allocators and kswapd · 085b4897
      Andrew Morton authored
      This is just a random unsubstantiated tuning tweak: don't immediately
      throttle page allocators and kwapd when the going is getting heavier: scan a
      bit more of the LRU before throttling.
      085b4897
    • Andrew Morton's avatar
      [PATCH] fix the kswapd zone scanning algorithm · ffa0fb78
      Andrew Morton authored
      This removes a vestige of the old algorithm.  We don't want to skip zones if
      all_zones_ok is true: we've already precalculated which zones need scanning
      and this just stops us from ever performing kswapd reclaim from the DMA zone.
      ffa0fb78
    • Andrew Morton's avatar
      [PATCH] kswapd: fix lumpy page reclaim · 519ab68b
      Andrew Morton authored
      As kswapd is now scanning zones in the highmem->normal->dma direction it can
      get into competition with the page allocator: kswapd keep on trying to free
      pages from highmem, then kswapd moves onto lowmem.  By the time kswapd has
      done proportional scanning in lowmem, someone has come in and allocated a few
      pages from highmem.  So kswapd goes back and frees some highmem, then some
      lowmem again.  But nobody has allocated any lowmem yet.  So we keep on and on
      scanning lowmem in response to highmem page allocations.
      
      With a simple `dd' on a 1G box we get:
      
       r  b   swpd   free   buff  cache   si   so    bi    bo   in    cs us sy wa id
       0  3      0  59340   4628 922348    0    0     4 28188 1072   808  0 10 46 44
       0  3      0  29932   4660 951760    0    0     0 30752 1078   441  1  6 30 64
       0  3      0  57568   4556 924052    0    0     0 30748 1075   478  0  8 43 49
       0  3      0  29664   4584 952176    0    0     0 30752 1075   472  0  6 34 60
       0  3      0   5304   4620 976280    0    0     4 40484 1073   456  1  7 52 41
       0  3      0 104856   4508 877112    0    0     0 18452 1074    97  0  7 67 26
       0  3      0  70768   4540 911488    0    0     0 35876 1078   746  0  7 34 59
       1  2      0  42544   4568 939680    0    0     0 21524 1073   556  0  5 43 51
       0  3      0   5520   4608 976428    0    0     4 37924 1076   836  0  7 41 51
       0  2      0   4848   4632 976812    0    0    32 12308 1092    94  0  1 33 66
      
      Simple fix: go back to scanning the zones in the dma->normal->highmem
      direction so we meet the page allocator in the middle somewhere.
      
       r  b   swpd   free   buff  cache   si   so    bi    bo   in    cs us sy wa id
       1  3      0   5152   3468 976548    0    0     4 37924 1071   650  0  8 64 28
       1  2      0   4888   3496 976588    0    0     0 23576 1075   726  0  6 66 27
       0  3      0   5336   3532 976348    0    0     0 31264 1072   708  0  8 60 32
       0  3      0   6168   3560 975504    0    0     0 40992 1072   683  0  6 63 31
       0  3      0   4560   3580 976844    0    0     0 18448 1073   233  0  4 59 37
       0  3      0   5840   3624 975712    0    0     4 26660 1072   800  1  8 46 45
       0  3      0   4816   3648 976640    0    0     0 40992 1073   526  0  6 47 47
       0  3      0   5456   3672 976072    0    0     0 19984 1070   320  0  5 60 35
      519ab68b
    • Andrew Morton's avatar
      [PATCH] kswapd: avoid unnecessary reclaiming from higher zones · 9ef935c2
      Andrew Morton authored
      Currently kswapd walks across all zones in dma->normal->highmem order,
      performing proportional scanning until all zones are OK.  This means that
      pressure against ZONE_NORMAL causes unnecessary reclaim of ZONE_HIGHMEM.
      
      To fix that up we change kswapd so that it walks the zones in the
      high->normal->dma direction, skipping zones which are OK.  Once it encounters
      a zone which needs some reclaim kswapd will perform proportional scanning
      against that zone as well as all the succeeding lower zones.
      
      We scan the lower zones even if they have sufficient free pages.  This is
      because
      
      a) the lower zone may be above pages_high, but because of the incremental
         min, the lower zone may still not be eligible for allocations.  That's bad
         because cache in that lower zone will then not be scanned at the correct
         rate.
      
      b) pages in this lower zone are usable for allocations against the higher
         zone.  So we do want to san all the relevant zones at an equal rate.
      9ef935c2
    • Andrew Morton's avatar
      [PATCH] vmscan: avoid bogus throttling · bcf2fb27
      Andrew Morton authored
      - If max_scan evaluates to zero due to a very small inactive list and high
        `priority' numbers, we don't want to thrlttle yet.
      
      - In balance_pgdat(), we may end up not scanning any pages because all
        zones happened to be above pages_high.  Avoid throttling in this case too.
      bcf2fb27
    • Andrew Morton's avatar
      [PATCH] Balance inter-zone scan rates · e5f02647
      Andrew Morton authored
      When page reclaim is working out how many pages to san in a zone (max-scan)
      it presently rounds that number up if it looks too small - for work batching.
      
      Problem is, this can result in excessive scanning against small zones which
      have few inactive pages.  So remove it.
      
      Not that it is possible for max_scan to be zero.  That's OK - it'll become
      non-zero as the priority increases.
      e5f02647
    • Andrew Morton's avatar
      [PATCH] vmscan: drive everything via nr_to_scan · 5954a8b0
      Andrew Morton authored
      Page reclaim is currently a bit schitzo: sometimes we say "go and scan this
      many pages and tell me how many pages were freed" and at other times we say
      "go and scan this many pages, but stop if you freed this many".
      
      It makes the logic harder to control and to understand.  This patch coverts
      everything into the "go and scan this many pages and tell me how many pages
      were freed" model.
      
      It doesn't seem to affect performance much either way.
      5954a8b0
    • Andrew Morton's avatar
      [PATCH] vmscan: zone balancing fix · b532f4af
      Andrew Morton authored
      We currently have a problem with the balancing of reclaim between zones: much
      more reclaim happens against highmem than against lowmem.
      
      This patch partially fixes this by changing the direct reclaim path so it
      does not bale out of the zone walk after having reclaimed sufficient pages
      from highmem: go on to reclaim from lowmem regardless of how many pages we
      reclaimed from lowmem.
      b532f4af
    • Andrew Morton's avatar
      [PATCH] vm: scan slab in response to highmem scanning · 768c4fcc
      Andrew Morton authored
      The patch which went in six months or so back which said "only reclaim slab
      if we're scanning lowmem pagecache" was wrong.  I must have been asleep at
      the time.
      
      We do need to scan slab in response to highmem page reclaim as well.  Because
      all the math is based around the total amount of memory in the machine, and
      we know that if we're performing highmem page reclaim then the lower zones
      have no free memory.
      768c4fcc
    • Andrew Morton's avatar
      [PATCH] vmscan: fix calculation of number of pages scanned · a5cc10d5
      Andrew Morton authored
      From: Nick Piggin <piggin@cyberone.com.au>
      
      The logic which calculates the numberof pages which were scanned is mucked
      up.  Fix.
      a5cc10d5
    • Andrew Morton's avatar
      [PATCH] vm: shrink slab evenly in try_to_free_pages() · b488ea81
      Andrew Morton authored
      From: Nick Piggin <piggin@cyberone.com.au>
      
      In try_to_free_pages(), put even pressure on the slab even if we have
      reclaimed enough pages from the LRU.
      b488ea81
    • Andrew Morton's avatar
      [PATCH] shrink_slab: math precision fix · dee96113
      Andrew Morton authored
      From: Nick Piggin <piggin@cyberone.com.au>
      
      In shrink_slab(), do the multiply before the divide to avoid losing
      precision.
      dee96113
    • Andrew Morton's avatar
      [PATCH] vmscan: preserve page referenced info in refill_inactive() · 29d8c59c
      Andrew Morton authored
      From: Nick Piggin <piggin@cyberone.com.au>
      
      If refill_inactive_zone() is running in its dont-reclaim-mapped-memory mode
      we are tossing away the referenced infomation on active mapped pages.
      
      So put that info back if we're not going to deactivate the page.
      29d8c59c
    • Andrew Morton's avatar
      [PATCH] kswapd throttling fixes · b6c1702e
      Andrew Morton authored
      The logic in balance_pgdat() is all bollixed up.
      
      - the incoming arg `nr_pages' should be used to determine if we're being
        asked to free a specific number of pages, not `to_free'.
      
      - local variable `to_free' is not appropriate for the determination of
        whether we failed to bring all zones to appropriate free pages levels.
      
        Fix this by correctly calculating `all_zones_ok' and then use
        all_zones_ok to determine whether we need to throttle kswapd.
      
      So the logic now is:
      
      
      	for (increasing priority) {
      
      		all_zones_ok = 1;
      
      		for (all zones) {
      			to_reclaim = number of pages to try to reclaim
      				     from this zone;
      			max_scan = number of pages to scan in this pass
      				   (gets larger as `priority' decreases)
      			/*
      			 * set `reclaimed' to the number of pages which were
      			 * actually freed up
      			 */
      			reclaimed = scan(max_scan pages);
      			reclaimed += shrink_slab();
      
      			to_free -= reclaimed;	/* for the `nr_pages>0' case */
      
      			/*
      			 * If this scan failed to reclaim `to_reclaim' or more
      			 * pages, we're getting into trouble.  Need to scan
      			 * some more, and throttle kswapd.   Note that this
      			 * zone may now have sufficient free pages due to
      			 * freeing activity by some other process.   That's
      			 * OK - we'll pick that info up on the next pass
      			 * through the loop.
      			 */
      			if (reclaimed < to_reclaim)
      				all_zones_ok = 0;
      		}
      		if (to_free > 0)
      			continue;	/* swsusp: need to do more work */
      		if (all_zones_ok)
      			break;		/* kswapd is done */
      		/*
      		 * OK, kswapd is getting into trouble.  Take a nap, then take
      		 * another pass across the zones.
      		 */
      		blk_congestion_wait();
      	}
      b6c1702e
    • Andrew Morton's avatar
      [PATCH] mm/vmscan.c: remove unused priority argument. · 13095f7a
      Andrew Morton authored
      From: Nikita Danilov <Nikita@Namesys.COM>
      
      Now that decision to reclaim mapped memory is taken on the basis of
      zone->prev_priority, priority argument is no longer needed.
      13095f7a
    • Andrew Morton's avatar
      [PATCH] Narrow blk_congestion_wait races · c05d7ab9
      Andrew Morton authored
      From: Nick Piggin <piggin@cyberone.com.au>
      
      The addition of the smp_mb and the other change is to try to close the
      window for races a bit.  Obviously they can still happen, it's a racy
      interface and it doesn't matter much.
      c05d7ab9
    • Andrew Morton's avatar
      [PATCH] return remaining jiffies from blk_congestion_wait() · f3179458
      Andrew Morton authored
      Teach blk_congestion_wait() to return the number of jiffies remaining.  This
      is for debug, but it is also nicely consistent.
      f3179458
    • Andrew Morton's avatar
      [PATCH] vm: per-zone vmscan instrumentation · 760d95b5
      Andrew Morton authored
      To check on zone balancing, split the /proc/vmstat:pgsteal, pgreclaim pgalloc
      and pgscan stats into per-zone counters.
      
      Additionally, split the pgscan stats into pgscan_direct and pgscan_kswapd to
      see who's doing how much scanning.
      
      And add a metric for the number of slab objects which were scanned.
      760d95b5
    • Andrew Morton's avatar
      [PATCH] synclink.c update · bae30a3f
      Andrew Morton authored
      From: Paul Fulghum <paulkf@microgate.com>
      
      * track driver API changes
      * remove cast (kernel janitor)
      bae30a3f