Re: [PATCH 0/7] De-couple sysfs memory directories from memory sections
On Mon, Jul 12, 2010 at 10:27:02AM -0500, Nathan Fontenot wrote: This set of patches de-couples the idea that there is a single directory in sysfs for each memory section. Any reason you didn't cc: the sysfs maintainer on these patches? If not, I'll gladly ignore them... (hint, scripts/get_maintainer.pl is your friend...) greg k-h ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
Re: [PATCH 0/7] De-couple sysfs memory directories from memory sections
On 07/16/2010 02:13 AM, Greg KH wrote: On Mon, Jul 12, 2010 at 10:27:02AM -0500, Nathan Fontenot wrote: This set of patches de-couples the idea that there is a single directory in sysfs for each memory section. Any reason you didn't cc: the sysfs maintainer on these patches? If not, I'll gladly ignore them... Ummm I have no good excuse. :) Will add you to cc for v3 of the patch. (hint, scripts/get_maintainer.pl is your friend...) Thanks. -Nathan greg k-h ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
[PATCH 0/7] De-couple sysfs memory directories from memory sections
This set of patches de-couples the idea that there is a single directory in sysfs for each memory section. The intent of the patches is to reduce the number of sysfs directories created to resolve a boot-time performance issue. On very large systems boot time are getting very long (as seen on powerpc hardware) due to the enormous number of sysfs directories being created. On a system with 1 TB of memory we create ~63,000 directories. For even larger systems boot times are being measured in hours. This set of patches allows for each directory created in sysfs to cover more than one memory section. The default behavior for sysfs directory creation is the same, in that each directory represents a single memory section. This update also adds to new files to each sysfs memory directory. The file 'end_phys_index' contains the physical id of the last memory section covered by the directory. The file 'split' allows for splitting the directory in two, with each new directory covering half as many memory sections as the previous directory. Thanks, Nathan Fontenot ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
Re: [PATCH 0/7] De-couple sysfs memory directories from memory sections
On 07/12/2010 02:30 PM, Bodo Eggert wrote: Nathan Fontenot nf...@austin.ibm.com wrote: The file 'split' allows for splitting the directory in two, with each new directory covering half as many memory sections as the previous directory. Just some random thoughts: 1) Why is it needed/helpful? This is needed if someone needed to perform an action (add/remove) a single memory section. The 'split' option allows users to isolate a memory section so these operations could be performed. 2) If it is needed, why not take an int to split after n entries? The idea of being able to split a directory came out of a previous discussion on how to resolve the issue this patch set is trying to solve. I included the split functionality in this patch set since it was suggested. I will leave the decision of whether or not this functionality is needed up to the community. -Nathan ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
Re: [PATCH 0/7] De-couple sysfs memory directories from memory sections
Nathan Fontenot nf...@austin.ibm.com wrote: The file 'split' allows for splitting the directory in two, with each new directory covering half as many memory sections as the previous directory. Just some random thoughts: 1) Why is it needed/helpful? 2) If it is needed, why not take an int to split after n entries? ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
