diff options
author | David Woodhouse <dwmw2@infradead.org> | 2006-05-16 01:19:52 +0100 |
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committer | David Woodhouse <dwmw2@infradead.org> | 2006-05-16 01:19:52 +0100 |
commit | 18594822fcb01d4b35e05b9018f770a0b4156d1a (patch) | |
tree | 38d35c38086a564beaac215f8e52694cdbfab1c3 /block/ll_rw_blk.c | |
parent | [PATCH] jffs2: memory leak in jffs2_scan_medium() (diff) | |
parent | [PATCH] dl2k needs dma-mapping.h (diff) | |
download | linux-dev-18594822fcb01d4b35e05b9018f770a0b4156d1a.tar.xz linux-dev-18594822fcb01d4b35e05b9018f770a0b4156d1a.zip |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'block/ll_rw_blk.c')
-rw-r--r-- | block/ll_rw_blk.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c index e5041a02e21f..eac48bec1479 100644 --- a/block/ll_rw_blk.c +++ b/block/ll_rw_blk.c @@ -1732,8 +1732,21 @@ void blk_run_queue(struct request_queue *q) spin_lock_irqsave(q->queue_lock, flags); blk_remove_plug(q); - if (!elv_queue_empty(q)) - q->request_fn(q); + + /* + * Only recurse once to avoid overrunning the stack, let the unplug + * handling reinvoke the handler shortly if we already got there. + */ + if (!elv_queue_empty(q)) { + if (!test_and_set_bit(QUEUE_FLAG_REENTER, &q->queue_flags)) { + q->request_fn(q); + clear_bit(QUEUE_FLAG_REENTER, &q->queue_flags); + } else { + blk_plug_device(q); + kblockd_schedule_work(&q->unplug_work); + } + } + spin_unlock_irqrestore(q->queue_lock, flags); } EXPORT_SYMBOL(blk_run_queue); |