Messages in this thread | | | Date | Tue, 29 Jul 2008 19:05:46 +0400 | From | Alexey Dobriyan <> | Subject | Re: cpu4096 + smp_affinity breakage |
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On Tue, Jul 29, 2008 at 04:34:13PM +0200, Jiri Slaby wrote: > I see cpu4096 branches in -tip. Do you know about /proc/irq/*/*smp_affinity > (irq_affinity_read_proc, default_affinity_read) breakage with NR_CPUS=4096? > Reading by `cat' from those files fails due to bitmap sent out is about > 1150 bytes, but cat provides only 1024B sized buffer. Can you think about > any fix for this? > > Using file offset and utilize only portion of that buffer returned to the > userspace will break atomicity I guess (does this matter?). If we get a > snapshot, it would get old if some reader breaks up. And if we use > per-reader buffer, we will be unable to free it. Any ideas? > > I think the same problem is for not-at-once-writes.
Time to ressurect my smp_affinity-as-seq-file patch which was dropped for a stupid reason.
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