[dpdk-dev] [PATCH v3 2/8] hash: fix a multi-writer bug

[De Lara Guarch, Pablo]

> -----Original Message-----
> From: Wang, Yipeng1
> Sent: Friday, July 6, 2018 8:47 PM
> To: De Lara Guarch, Pablo <pablo.de.lara.guarch at intel.com>
> Cc: dev at dpdk.org; Wang, Yipeng1 <yipeng1.wang at intel.com>; Richardson,
> Bruce <bruce.richardson at intel.com>; honnappa.nagarahalli at arm.com;
> vguvva at caviumnetworks.com; brijesh.s.singh at gmail.com
> Subject: [PATCH v3 2/8] hash: fix a multi-writer bug

Just a minor comment on the title. It should be a summary of the commit
(try to summarize the bug, instead of using the word "bug").
Keep my ack for the next version (like in other patches).

> 
> Current multi-writer implementation uses Intel TSX to protect the cuckoo path
> moving but not the cuckoo path searching. After searching, we need to verify
> again if the same empty slot still exists at the beginning of the TSX region.
> Otherwise another writer could occupy the empty slot before the TSX region.
> Current code does not verify.
> 
> Fixes: be856325cba3 ("hash: add scalable multi-writer insertion with Intel TSX")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Yipeng Wang <yipeng1.wang at intel.com>

Acked-by: Pablo de Lara <pablo.de.lara.guarch at intel.com>