lkml.org 
[lkml]   [2008]   [Mar]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subjectregression breaks lowmem reserved RAM
    This is crashing at boot my lowmem reserved RAM patch. This is causing
    GFP_DMA allocations at boot for no good reason. It crashes in my case
    because there's no ram below 16M available to linux. Are you sure this
    is needed at all, for sure if there's any bug this isn't the right fix.

    Please reverse, thanks!

    changeset: 87150:1f7afb388483
    user: Yang Shi <yang.shi@windriver.com>
    date: Tue Mar 04 11:20:51 2008 +0100
    summary: Fix DMA access of block device in 64-bit kernel on some non-x86 systems with 4GB or upper 4GB memory

    diff --git a/block/blk-settings.c b/block/blk-settings.c
    --- a/block/blk-settings.c
    +++ b/block/blk-settings.c
    @@ -140,7 +140,7 @@ void blk_queue_bounce_limit(struct reque
    /* Assume anything <= 4GB can be handled by IOMMU.
    Actually some IOMMUs can handle everything, but I don't
    know of a way to test this here. */
    - if (b_pfn < (min_t(u64, 0xffffffff, BLK_BOUNCE_HIGH) >> PAGE_SHIFT))
    + if (b_pfn <= (min_t(u64, 0xffffffff, BLK_BOUNCE_HIGH) >> PAGE_SHIFT))
    dma = 1;
    q->bounce_pfn = max_low_pfn;
    #else

    \
     
     \ /
      Last update: 2008-03-28 20:51    [W:0.059 / U:90.220 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site