search for: xas

Sorry for this out-of-topic message. A while ago, somebody mentioned a software (an R interface xas in development at that time) to graphically look inside classification/regression trees and calculate various statistics on their nodes. Unfortunatelly, I lost the link and do not remember at all the name of the software. Could someone refresh my poor memory,... or perhaps point me on other interes...

...truct page *dax_busy_page(void *entry) for_each_mapped_pfn(entry, pfn) { struct page *page = pfn_to_page(pfn); - if (page_ref_count(page) > 1) + if (!dax_layout_is_idle_page(page)) return page; } return NULL; @@ -560,11 +560,11 @@ static void *grab_mapping_entry(struct xa_state *xas, /** * dax_layout_busy_page - find first pinned page in @mapping - * @mapping: address space to scan for a page with ref count > 1 + * @mapping: address space to scan for a page with ref count > 0 * * DAX requires ZONE_DEVICE mapped pages. These pages are never * 'onlined'...

...lit the file into little files with the file size equaling to 128K, which is the maximum of the block-size accepted by rsync. split -b 128K Packages.bz2 And at this point, I obtained the following 20 files: werner at debian:~/http_resume_test$ ls x* xaa xac xae xag xai xak xam xao xaq xas xab xad xaf xah xaj xal xan xap xar xat Then I delete the some files, say, xab and xae, from the above little files, and then use the cat tool to regenerate the Packages.bz2 by only using the remaining little files: werner at debian:~/http_resume_test$ for i in `ls x*`; do cat $i >&...

...page = pfn_to_page(pfn); > > - if (page_ref_count(page) > 1) > + if (!dax_layout_is_idle_page(page)) > return page; > } > return NULL; > @@ -560,11 +560,11 @@ static void *grab_mapping_entry(struct xa_state *xas, > > /** > * dax_layout_busy_page - find first pinned page in @mapping > - * @mapping: address space to scan for a page with ref count > 1 > + * @mapping: address space to scan for a page with ref count > 0 > * > * DAX requires ZONE_DEVICE mapped pages. These pages...

...split the file into little files with the file size equaling to 128K, which is the maximum of the block-size accepted by rsync. split -b 128K Packages.bz2 And at this point, I obtained the following 20 files: werner at debian:~/http_resume_test$ ls x* xaa xac xae xag xai xak xam xao xaq xas xab xad xaf xah xaj xal xan xap xar xat Then I delete some files, say, xab and xae, from the above little files, and then use the cat tool to regenerate the Packages.bz2 by only using the remaining little files: werner at debian:~/http_resume_test$ for i in `ls x*`; do cat $i >> Pa...

...ed_count; > > + refs += folio_nr_pages(folio); > > + if (folio_get_private(folio)) > > + refs++; > > + > > + return refs; > > } > > > > /* > > @@ -359,7 +364,7 @@ int folio_migrate_mapping(struct address_space *mapping, > > XA_STATE(xas, &mapping->i_pages, folio_index(folio)); > > struct zone *oldzone, *newzone; > > int dirty; > > - int expected_count = expected_page_refs(mapping, &folio->page) + extra_count; > > + int expected_count = folio_expected_refs(mapping, folio) + extra_count; &gt...

...ed_count; > > + refs += folio_nr_pages(folio); > > + if (folio_get_private(folio)) > > + refs++; > > + > > + return refs; > > } > > > > /* > > @@ -359,7 +364,7 @@ int folio_migrate_mapping(struct address_space *mapping, > > XA_STATE(xas, &mapping->i_pages, folio_index(folio)); > > struct zone *oldzone, *newzone; > > int dirty; > > - int expected_count = expected_page_refs(mapping, &folio->page) + extra_count; > > + int expected_count = folio_expected_refs(mapping, folio) + extra_count; &gt...

Matthew Wilcox, Ira Weiny, and others have complained that ZONE_DEVICE struct page reference counting is ugly because they are "free" when the reference count is one instead of zero. This leads to explicit checks for ZONE_DEVICE pages in places like put_page(), GUP, THP splitting, and page migration which have to adjust the expected reference count when determining if the page is

...ruct nouveau_drm *drm) return NULL; } - get_page(page); + init_page_count(page); lock_page(page); return page; } diff --git a/fs/dax.c b/fs/dax.c index 85c63f735909..4804348f62e6 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -560,14 +560,14 @@ static void *grab_mapping_entry(struct xa_state *xas, /** * dax_layout_busy_page_range - find first pinned page in @mapping - * @mapping: address space to scan for a page with ref count > 1 + * @mapping: address space to scan for a page with ref count > 0 * @start: Starting offset. Page containing 'start' is included. * @end: E...

This is still an RFC because after looking at the pmem/dax code some more, I realized that the ZONE_DEVICE struct pages are being inserted into the process' page tables with vmf_insert_mixed() and a zero refcount on the ZONE_DEVICE struct page. This is sort of OK because insert_pfn() increments the reference count on the pgmap which is what prevents memunmap_pages() from freeing the struct

depends on "autoconf: regenerate configure scripts with 4.4 version" This series removes some of the really old deadwood from the tools build and makes some other things which are on their way out configurable at build time with a default depending on how far down the slope I judge them to be. * nuke in tree copy of libaio * nuke obsolete tools: xsview, miniterm, lomount & sv *