Re: [PATCH] Export shmem_file_setup and shmem_getpage for DRM-GEM | KernelTrap

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DRM-GEM

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From: Christoph Hellwig <hch@...>

To: Keith Packard <keithp@...>

Cc: Christoph Hellwig <hch@...>, Eric Anholt <eric@...>, <linux-kernel@...>

Subject: Re: [PATCH] Export shmem_file_setup and shmem_getpage for DRM-GEM

Date: Sunday, August 10, 2008 - 9:23 pm

On Fri, Aug 01, 2008 at 04:01:58PM -0700, Keith Packard wrote:
quoted text> On Fri, 2008-08-01 at 16:50 -0400, Christoph Hellwig wrote:
> 
> > Nope.  Let the userspace protion create a file in shmfs instead of
> > adding fugly kernel interfaces hdiing this fact.
> 
> I can't create that many files; I need thousands of them.

shmfs is perfectly happy to have thousands of files, there are workloads
that have a lot more than that.  Note that in other subthreads there is
the assumption that all of them are open and in the fd table at the same
time.  I haven't really seen a good explanation for that - objects on
shmfs are persistant until deleted, and when you keep your parent
directory fd open an openat to get at the actual object is cheap.

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Messages in current thread:

[PATCH] PCI: Add pci_read_base() API, Eric Anholt, (Fri Aug 1, 2:58 am)

[PATCH] Export shmem_file_setup and shmem_getpage for DRM-GEM, Eric Anholt, (Fri Aug 1, 2:58 am)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Christoph Hellwig, (Fri Aug 1, 4:50 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Keith Packard, (Sun Aug 3, 9:54 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Nick Piggin, (Mon Aug 4, 5:02 am)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Keith Packard, (Mon Aug 4, 5:58 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Nick Piggin, (Tue Aug 5, 12:43 am)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Dave Airlie, (Mon Aug 18, 9:17 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Nick Piggin, (Tue Aug 19, 6:00 am)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Keith Packard, (Tue Aug 19, 12:46 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Jesse Barnes, (Tue Aug 19, 2:50 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Jerome Glisse, (Thu Aug 21, 9:42 am)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Jesse Barnes, (Thu Aug 21, 12:15 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Jesse Barnes, (Wed Aug 6, 8:45 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Keith Packard, (Tue Aug 5, 1:19 am)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Dave Airlie, (Mon Aug 4, 6:22 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Keith Packard, (Mon Aug 4, 6:26 am)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Nick Piggin, (Mon Aug 4, 6:43 am)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Keith Packard, (Mon Aug 4, 7:45 am)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Hugh Dickins, (Mon Aug 4, 1:09 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Christoph Hellwig, (Sun Aug 10, 9:30 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Nick Piggin, (Tue Aug 5, 12:28 am)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Keith Packard, (Mon Aug 4, 1:25 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Hugh Dickins, (Mon Aug 4, 2:39 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Keith Packard, (Mon Aug 4, 3:20 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Hugh Dickins, (Mon Aug 4, 3:55 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., John Stoffel, (Mon Aug 4, 10:25 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Keith Packard, (Tue Aug 5, 12:28 am)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Stephane Marchesin, (Wed Aug 6, 12:20 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Arjan van de Ven, (Wed Aug 6, 1:24 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Christoph Hellwig, (Sun Aug 10, 9:34 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Stephane Marchesin, (Wed Aug 6, 10:16 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Keith Packard, (Wed Aug 6, 10:57 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Stephane Marchesin, (Wed Aug 6, 1:32 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Keith Packard, (Wed Aug 6, 1:56 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Stephane Marchesin, (Wed Aug 6, 2:09 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Keith Packard, (Wed Aug 6, 5:22 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Keith Packard, (Mon Aug 4, 5:37 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Keith Packard, (Fri Aug 1, 7:01 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Christoph Hellwig, (Sun Aug 10, 9:23 pm)

Re: [PATCH] Export shmem_file_setup for DRM-GEM, Keith Packard, (Sun Aug 10, 11:03 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., John Stoffel, (Sun Aug 3, 8:49 am)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Keith Packard, (Sun Aug 3, 1:52 pm)

files/process scaling problem? (was: [PATCH] Export shmem_fi..., Ingo Oeser, (Sun Aug 3, 7:35 pm)

Re: files/process scaling problem? (was: [PATCH] Export shme..., Keith Packard, (Sun Aug 3, 8:19 pm)

Re: files/process scaling problem? (was: [PATCH] Export shme..., Alan Cox, (Mon Aug 4, 4:19 am)

Re: files/process scaling problem? (was: [PATCH] Export shme..., Arjan van de Ven, (Mon Aug 4, 9:51 am)

Re: files/process scaling problem? (was: [PATCH] Export shme..., Alan Cox, (Mon Aug 4, 10:11 am)

Re: files/process scaling problem? (was: [PATCH] Export shme..., Keith Packard, (Mon Aug 4, 12:58 pm)

Re: files/process scaling problem? (was: [PATCH] Export shme..., Ingo Oeser, (Mon Aug 4, 5:46 pm)

Re: files/process scaling problem? (was: [PATCH] Export shme..., Keith Packard, (Mon Aug 4, 8:34 pm)

Re: files/process scaling problem? (was: [PATCH] Export shme..., Dave Airlie, (Mon Aug 4, 6:20 pm)

Re: files/process scaling problem? (was: [PATCH] Export shme..., Arjan van de Ven, (Mon Aug 4, 12:38 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Hugh Dickins, (Fri Aug 1, 6:57 am)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Keith Packard, (Fri Aug 1, 2:06 pm)

Re: [PATCH] Export shmem_file_setup and shmem_getpage for DR..., Eric Anholt, (Fri Aug 1, 3:10 am)

[PATCH] drm: Add GEM ("graphics execution manager") to i915 ..., Eric Anholt, (Fri Aug 1, 2:58 am)

Re: [PATCH] drm: Add GEM ("graphics execution manager") to i..., Randy Dunlap, (Fri Aug 1, 11:44 am)

Re: [PATCH] drm: Add GEM ("graphics execution manager") to i..., Eric Anholt, (Tue Aug 5, 9:11 pm)

Re: [PATCH] drm: Add GEM ("graphics execution manager") to i..., Keith Packard, (Fri Aug 1, 2:11 pm)

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