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Re: [PATCH 2/3] i386: add io_map_cached
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From: |
Samuel Thibault |
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Subject: |
Re: [PATCH 2/3] i386: add io_map_cached |
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Date: |
Thu, 15 May 2014 02:13:13 +0200 |
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User-agent: |
Mutt/1.5.21+34 (58baf7c9f32f) (2010-12-30) |
Hello,
Justus Winter, le Fri 02 May 2014 21:33:01 +0200, a écrit :
> io_map_cached is like io_map, but reuses the old mapping if it is
> applicable.
But AIUI, if it is not applicable, it does not unmap the previous
mapping, so we lose virtual memory.
A really transparent io_map_cached seems not really feasible, since you
never know what the caller will do with the pointer.
I'm wondering: why not just use phystokv() in acpi.c instead?
Samuel
Re: [PATCH 1/3] ddb: add "halt" command, Samuel Thibault, 2014/05/02