On Fri, Jun 08, 2007 at 04:14:52PM +0200, Jens Axboe ([EMAIL PROTECTED]) wrote:
> Here's a start, for the splice side at least of storing a buf-private
> entity with the ops.
:) I tested the same implementation, but I put skb pointer into
page->private. My approach is not correct, since the same page can hold
several objects, so if there are several splicers, this will scream.
I've tested your patch on top of splice-net branch, here is a result:
[ 44.798853] Slab corruption: skbuff_head_cache start=ffff81003b726668,
len=192
[ 44.806148] Redzone: 0x9f911029d74e35b/0x9f911029d74e35b.
[ 44.811598] Last user: [<ffffffff803699fd>](kfree_skbmem+0x7a/0x7e)
[ 44.818012] 0b0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6a 6b 6b a5
[ 44.824889] Prev obj: start=ffff81003b726590, len=192
[ 44.829985] Redzone: 0xd84156c5635688c0/0xd84156c5635688c0.
[ 44.835604] Last user: [<ffffffff8036a22c>](__alloc_skb+0x40/0x13f)
[ 44.842010] 000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 44.848896] 010: 20 58 7e 3b 00 81 ff ff 00 00 00 00 00 00 00 00
[ 44.855772] Next obj: start=ffff81003b726740, len=192
[ 44.860868] Redzone: 0x9f911029d74e35b/0x9f911029d74e35b.
[ 44.866314] Last user: [<ffffffff803699fd>](kfree_skbmem+0x7a/0x7e)
[ 44.872721] 000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
[ 44.879597] 010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
I will try some things for the nearest 30-60 minutes, and then will move to
canoe trip until thuesday, so will not be able to work on this idea.
--
Evgeniy Polyakov
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