Messages in this thread | | | Date | Sun, 2 Jan 2005 12:25:29 -0800 | From | William Lee Irwin III <> | Subject | Re: [PATCH][1/2] adjust dirty threshold for lowmem-only mappings |
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At some point in the past, I wrote: >>> Lifting the artificial lowmem restrictions on blockdev mappings >>> (thereby nuking mapping->gfp_mask altogether) would resolve a number of >>> problems, not that anything making that much sense could ever happen.
Jens Axboe <axboe@suse.de> wrote: >> It should be lifted for block devices, it doesn't make any sense.
On Sun, Jan 02, 2005 at 12:03:24PM -0800, Andrew Morton wrote: > Before we can permit blockdev pagecache to use highmem we must convert > every piece of code which accesses the cache to use kmap/kmap_atomic. If > you grep around for b_data you'll see there are a lot of such places. > Probably the migration could be done on a per-fs basis.
I'd regard such an incremental conversion strategy as a prerequisite, and would have no trouble working within such constraints.
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