| Message ID | 1354010422-19648-4-git-send-email-wency@cn.fujitsu.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
On 11/27/2012 06:00 PM, Wen Congyang wrote: > offlining memory blocks and checking whether memory blocks are offlined > are very similar. This patch introduces a new function to remove > redundant codes. > > CC: David Rientjes<rientjes@google.com> > CC: Jiang Liu<liuj97@gmail.com> > CC: Len Brown<len.brown@intel.com> > CC: Christoph Lameter<cl@linux.com> > Cc: Minchan Kim<minchan.kim@gmail.com> > CC: Andrew Morton<akpm@linux-foundation.org> > CC: KOSAKI Motohiro<kosaki.motohiro@jp.fujitsu.com> > CC: Yasuaki Ishimatsu<isimatu.yasuaki@jp.fujitsu.com> > Signed-off-by: Wen Congyang<wency@cn.fujitsu.com> Can we merge this patch with [PATCH 03/12] ? Reviewed-by: Tang Chen <tangchen@cn.fujitsu.com> > --- > mm/memory_hotplug.c | 101 ++++++++++++++++++++++++++++------------------------ > 1 file changed, 55 insertions(+), 46 deletions(-) > > diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c > index b6d1101..6d06488 100644 > --- a/mm/memory_hotplug.c > +++ b/mm/memory_hotplug.c > @@ -1005,20 +1005,14 @@ int offline_pages(unsigned long start_pfn, unsigned long nr_pages) > return __offline_pages(start_pfn, start_pfn + nr_pages, 120 * HZ); > } > > -int remove_memory(u64 start, u64 size) > +static int walk_memory_range(unsigned long start_pfn, unsigned long end_pfn, > + void *arg, int (*func)(struct memory_block *, void *)) > { > struct memory_block *mem = NULL; > struct mem_section *section; > - unsigned long start_pfn, end_pfn; > unsigned long pfn, section_nr; > int ret; > - int return_on_error = 0; > - int retry = 0; > - > - start_pfn = PFN_DOWN(start); > - end_pfn = start_pfn + PFN_DOWN(size); > > -repeat: > for (pfn = start_pfn; pfn< end_pfn; pfn += PAGES_PER_SECTION) { > section_nr = pfn_to_section_nr(pfn); > if (!present_section_nr(section_nr)) > @@ -1035,22 +1029,61 @@ repeat: > if (!mem) > continue; > > - ret = offline_memory_block(mem); > + ret = func(mem, arg); > if (ret) { > - if (return_on_error) { > - kobject_put(&mem->dev.kobj); > - return ret; > - } else { > - retry = 1; > - } > + kobject_put(&mem->dev.kobj); > + return ret; > } > } > > if (mem) > kobject_put(&mem->dev.kobj); > > - if (retry) { > - return_on_error = 1; > + return 0; > +} > + > +static int offline_memory_block_cb(struct memory_block *mem, void *arg) > +{ > + int *ret = arg; > + int error = offline_memory_block(mem); > + > + if (error != 0&& *ret == 0) > + *ret = error; > + > + return 0; > +} > + > +static int is_memblock_offlined_cb(struct memory_block *mem, void *arg) > +{ > + int ret = !is_memblock_offlined(mem); > + > + if (unlikely(ret)) > + pr_warn("removing memory fails, because memory " > + "[%#010llx-%#010llx] is onlined\n", > + PFN_PHYS(section_nr_to_pfn(mem->start_section_nr)), > + PFN_PHYS(section_nr_to_pfn(mem->end_section_nr + 1))-1); > + > + return ret; > +} > + > +int remove_memory(u64 start, u64 size) > +{ > + unsigned long start_pfn, end_pfn; > + int ret = 0; > + int retry = 1; > + > + start_pfn = PFN_DOWN(start); > + end_pfn = start_pfn + PFN_DOWN(size); > + > +repeat: > + walk_memory_range(start_pfn, end_pfn,&ret, > + offline_memory_block_cb); > + if (ret) { > + if (!retry) > + return ret; > + > + retry = 0; > + ret = 0; > goto repeat; > } > > @@ -1068,37 +1101,13 @@ repeat: > * memory blocks are offlined. > */ > > - for (pfn = start_pfn; pfn< end_pfn; pfn += PAGES_PER_SECTION) { > - section_nr = pfn_to_section_nr(pfn); > - if (!present_section_nr(section_nr)) > - continue; > - > - section = __nr_to_section(section_nr); > - /* same memblock? */ > - if (mem) > - if ((section_nr>= mem->start_section_nr)&& > - (section_nr<= mem->end_section_nr)) > - continue; > - > - mem = find_memory_block_hinted(section, mem); > - if (!mem) > - continue; > - > - ret = is_memblock_offlined(mem); > - if (!ret) { > - pr_warn("removing memory fails, because memory " > - "[%#010llx-%#010llx] is onlined\n", > - PFN_PHYS(section_nr_to_pfn(mem->start_section_nr)), > - PFN_PHYS(section_nr_to_pfn(mem->end_section_nr + 1)) - 1); > - > - kobject_put(&mem->dev.kobj); > - unlock_memory_hotplug(); > - return ret; > - } > + ret = walk_memory_range(start_pfn, end_pfn, NULL, > + is_memblock_offlined_cb); > + if (ret) { > + unlock_memory_hotplug(); > + return ret; > } > > - if (mem) > - kobject_put(&mem->dev.kobj); > unlock_memory_hotplug(); > > return 0; -- To unsubscribe from this list: send the line "unsubscribe linux-sh" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 12/04/2012 05:22 PM, Tang Chen wrote: > On 11/27/2012 06:00 PM, Wen Congyang wrote: >> offlining memory blocks and checking whether memory blocks are offlined >> are very similar. This patch introduces a new function to remove >> redundant codes. >> >> CC: David Rientjes<rientjes@google.com> >> CC: Jiang Liu<liuj97@gmail.com> >> CC: Len Brown<len.brown@intel.com> >> CC: Christoph Lameter<cl@linux.com> >> Cc: Minchan Kim<minchan.kim@gmail.com> >> CC: Andrew Morton<akpm@linux-foundation.org> >> CC: KOSAKI Motohiro<kosaki.motohiro@jp.fujitsu.com> >> CC: Yasuaki Ishimatsu<isimatu.yasuaki@jp.fujitsu.com> >> Signed-off-by: Wen Congyang<wency@cn.fujitsu.com> > > Can we merge this patch with [PATCH 03/12] ? Sorry, I think we can merge this patch into [PATCH 02/12]. Thanks. :) > > Reviewed-by: Tang Chen <tangchen@cn.fujitsu.com> > -- To unsubscribe from this list: send the line "unsubscribe linux-sh" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index b6d1101..6d06488 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -1005,20 +1005,14 @@ int offline_pages(unsigned long start_pfn, unsigned long nr_pages) return __offline_pages(start_pfn, start_pfn + nr_pages, 120 * HZ); } -int remove_memory(u64 start, u64 size) +static int walk_memory_range(unsigned long start_pfn, unsigned long end_pfn, + void *arg, int (*func)(struct memory_block *, void *)) { struct memory_block *mem = NULL; struct mem_section *section; - unsigned long start_pfn, end_pfn; unsigned long pfn, section_nr; int ret; - int return_on_error = 0; - int retry = 0; - - start_pfn = PFN_DOWN(start); - end_pfn = start_pfn + PFN_DOWN(size); -repeat: for (pfn = start_pfn; pfn < end_pfn; pfn += PAGES_PER_SECTION) { section_nr = pfn_to_section_nr(pfn); if (!present_section_nr(section_nr)) @@ -1035,22 +1029,61 @@ repeat: if (!mem) continue; - ret = offline_memory_block(mem); + ret = func(mem, arg); if (ret) { - if (return_on_error) { - kobject_put(&mem->dev.kobj); - return ret; - } else { - retry = 1; - } + kobject_put(&mem->dev.kobj); + return ret; } } if (mem) kobject_put(&mem->dev.kobj); - if (retry) { - return_on_error = 1; + return 0; +} + +static int offline_memory_block_cb(struct memory_block *mem, void *arg) +{ + int *ret = arg; + int error = offline_memory_block(mem); + + if (error != 0 && *ret == 0) + *ret = error; + + return 0; +} + +static int is_memblock_offlined_cb(struct memory_block *mem, void *arg) +{ + int ret = !is_memblock_offlined(mem); + + if (unlikely(ret)) + pr_warn("removing memory fails, because memory " + "[%#010llx-%#010llx] is onlined\n", + PFN_PHYS(section_nr_to_pfn(mem->start_section_nr)), + PFN_PHYS(section_nr_to_pfn(mem->end_section_nr + 1))-1); + + return ret; +} + +int remove_memory(u64 start, u64 size) +{ + unsigned long start_pfn, end_pfn; + int ret = 0; + int retry = 1; + + start_pfn = PFN_DOWN(start); + end_pfn = start_pfn + PFN_DOWN(size); + +repeat: + walk_memory_range(start_pfn, end_pfn, &ret, + offline_memory_block_cb); + if (ret) { + if (!retry) + return ret; + + retry = 0; + ret = 0; goto repeat; } @@ -1068,37 +1101,13 @@ repeat: * memory blocks are offlined. */ - for (pfn = start_pfn; pfn < end_pfn; pfn += PAGES_PER_SECTION) { - section_nr = pfn_to_section_nr(pfn); - if (!present_section_nr(section_nr)) - continue; - - section = __nr_to_section(section_nr); - /* same memblock? */ - if (mem) - if ((section_nr >= mem->start_section_nr) && - (section_nr <= mem->end_section_nr)) - continue; - - mem = find_memory_block_hinted(section, mem); - if (!mem) - continue; - - ret = is_memblock_offlined(mem); - if (!ret) { - pr_warn("removing memory fails, because memory " - "[%#010llx-%#010llx] is onlined\n", - PFN_PHYS(section_nr_to_pfn(mem->start_section_nr)), - PFN_PHYS(section_nr_to_pfn(mem->end_section_nr + 1)) - 1); - - kobject_put(&mem->dev.kobj); - unlock_memory_hotplug(); - return ret; - } + ret = walk_memory_range(start_pfn, end_pfn, NULL, + is_memblock_offlined_cb); + if (ret) { + unlock_memory_hotplug(); + return ret; } - if (mem) - kobject_put(&mem->dev.kobj); unlock_memory_hotplug(); return 0;
offlining memory blocks and checking whether memory blocks are offlined are very similar. This patch introduces a new function to remove redundant codes. CC: David Rientjes <rientjes@google.com> CC: Jiang Liu <liuj97@gmail.com> CC: Len Brown <len.brown@intel.com> CC: Christoph Lameter <cl@linux.com> Cc: Minchan Kim <minchan.kim@gmail.com> CC: Andrew Morton <akpm@linux-foundation.org> CC: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> CC: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> --- mm/memory_hotplug.c | 101 ++++++++++++++++++++++++++++------------------------ 1 file changed, 55 insertions(+), 46 deletions(-)