On Tue, 2013-04-16 at 10:10 +0900, Yasuaki Ishimatsu wrote: > When hot removing memory presented at boot time, following messages are shown: : > The reason why the messages are shown is to release a resource structure, > allocated by bootmem, by kfree(). So when we release a resource structure, > we should check whether it is allocated by bootmem or not. > > But even if we know a resource structure is allocated by bootmem, we cannot > release it since SLxB cannot treat it. So for reusing a resource structure, > this patch remembers it by using bootmem_resource as follows: > > When releasing a resource structure by free_resource(), free_resource() checks > whether the resource structure is allocated by bootmem or not. If it is > allocated by bootmem, free_resource() adds it to bootmem_resource. If it is > not allocated by bootmem, free_resource() release it by kfree(). > > And when getting a new resource structure by get_resource(), get_resource() > checks whether bootmem_resource has released resource structures or not. If > there is a released resource structure, get_resource() returns it. If there is > not a releaed resource structure, get_resource() returns new resource structure > allocated by kzalloc(). > > Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx> > --- > v2: > Based on following Toshi's works: > Support memory hot-delete to boot memory > https://lkml.org/lkml/2013/4/10/469 > resource: Update config option of release_mem_region_adjustable() > https://lkml.org/lkml/2013/4/11/694 > Added a NULL check into free_resource() > Remove __free_resource() Thanks for the update. Looks good. Can you also address Rui's comment? -Toshi -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>