Messages in this thread | | | Subject | Re: [PATCH 1/2] ext3 percpu counter fixes to suppport for more than 2**31 ext3 free blocks counter | From | Mingming Cao <> | Date | Mon, 24 Apr 2006 12:13:17 -0700 |
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On Mon, 2006-04-24 at 11:26 -0700, Ravikiran G Thirumalai wrote: > On Mon, Apr 24, 2006 at 10:48:32AM -0700, Mingming Cao wrote: > > On Fri, 2006-04-21 at 15:09 -0700, Andrew Morton wrote: > > > > > > > I think it would be saner to explicitly specify the size of the field. > > > That means using s32 and s64 throughout this code. > > > > > > > Agree. Will use s64 in this code. As s32 has the same issue with what we > > have(unsigned long) on 32 bit machine today: it is not enough for ext3 > > to support more than 2**31 free blocks, and also obviously not enough > > for 64 bit ext3 that Laurent is working on. > > I think Andrew's suggestion was to change global counter to s64 and local > counter to s32. That way we avoid allocating a 64 bit local counter on 64 > bit systems when we could do with a 32 bit counter. (although there is no > real space savings with current alloc_percpu ;), but hopefully that will > change in the future) >
Oh, I see. :-) I shall have the updated patch soon.
Mingming
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