Messages in this thread | | | Date | Wed, 16 Jun 2010 19:04:46 +0200 | From | Andrea Arcangeli <> | Subject | Re: [RFC PATCH 0/6] Do not call ->writepage[s] from direct reclaim and use a_ops->writepages() where possible |
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On Wed, Jun 16, 2010 at 12:59:54PM -0400, Rik van Riel wrote: > __GFP_IO can wait for filesystem activity
Hmm I think it's for submitting I/O, not about waiting. At some point you may not enter the FS because of the FS locks you already hold (like within writepage itself), but you can still submit I/O through blkdev layer.
> __GFP_FS can kick off new filesystem activity
Yes that's for dcache/icache/writepage or anything that can reenter the fs locks and deadlock IIRC.
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