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    SubjectRe: Linux-2.4.5
    On Fri, May 25, 2001 at 10:49:38PM -0400, Ben LaHaise wrote:
    > Highmem. 0 free pages in ZONE_NORMAL. Now try to allocate a buffer_head.

    That's a longstanding deadlock, it was there the first time I read
    fs/buffer.c, nothing related to highmem, we have it in 2.2 too. Also
    getblk is deadlock prone in a smiliar manner.

    Can you try to simply change NR_RESERVED to say 200*MAX_BUF_PER_PAGE and
    see if it makes a difference? The unused_list logic doesn't give a
    guarantee either and it's one of the "hiding" logics, but it was working
    pretty well usually, maybe something changed that needs more than 2
    pages (16 bh) reserved?

    Andrea
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