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Groups > linux.kernel > #1222700
| From | Mark Brown <broonie@kernel.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH] regmap: Allocate buffers with GFP_ATOMIC when fast_io == true |
| Date | 2015-09-11 12:30 +0200 |
| Message-ID | <q7tKG-7d0-27@gated-at.bofh.it> (permalink) |
| References | <q7fHI-2ta-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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On Thu, Sep 10, 2015 at 12:27:01PM -0700, Stephen Boyd wrote: > If a regmap is using fast_io, allocate buffers in the write APIs > with GFP_ATOMIC instead of GFP_KERNEL. Otherwise we may schedule > while atomic. Why is this needed? If something needs fast I/O it probably doesn't want to be going down any of the code paths that result in us doing allocations. I'd expect either no cache, a flat cache or setting up defaults at initialisation time.
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[PATCH] regmap: Allocate buffers with GFP_ATOMIC when fast_io == true Stephen Boyd <sboyd@codeaurora.org> - 2015-09-10 21:30 +0200
Re: [PATCH] regmap: Allocate buffers with GFP_ATOMIC when fast_io == true Mark Brown <broonie@kernel.org> - 2015-09-11 12:30 +0200
Re: [PATCH] regmap: Allocate buffers with GFP_ATOMIC when fast_io == true Stephen Boyd <sboyd@codeaurora.org> - 2015-09-11 18:20 +0200
Re: [PATCH] regmap: Allocate buffers with GFP_ATOMIC when fast_io == true Mark Brown <broonie@kernel.org> - 2015-09-11 19:30 +0200
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