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SubjectRe: [PATCH block/for-linus 1/3] block: replace icq->changed with icq->flags
2012/2/15 Tejun Heo <>:
> icq->changed was used for ICQ_*_CHANGED bits.  Rename it to flags and
> access it under ioc->lock instead of using atomic bitops.
> ioc_get_changed() is added so that the changed part can be fetched and
> cleared as before.
> icq->flags will be used to carry other flags.
> Signed-off-by: Tejun Heo <>
> ---
> Jens, these three patches are to fix the swap heavy workload
> regression reported by Shaohua.
> Shaohua, I ended up changing the second patch, which shouldn't change
> anything but it would be great if you can verify this series once
> more.
yes, confirmed the patches fix the regression. Thanks for fixing it.
Tested-by: Shaohua Li <>
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