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authorYinghai Lu <yinghai@kernel.org>2010-02-10 01:20:14 -0800
committerH. Peter Anvin <hpa@zytor.com>2010-02-10 17:47:17 -0800
commit79c601695870ca2a9c0ba9949a97d2be78ec07b2 (patch)
treec7df54cf5c8055b17e40351b04fd7783e0d8f966 /scripts/stackusage
parente9a0064ad03b899938059bb576615ad9ed0f27f9 (diff)
downloadkernel-79c601695870ca2a9c0ba9949a97d2be78ec07b2.tar.gz
x86: Print out RAM buffer information
So we can check that early in the bootlog. Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1265793639-15071-11-git-send-email-yinghai@kernel.org> Reviewed-by: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'scripts/stackusage')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.3 (git 2.46.0) at 2026-07-22 15:55:49 +0000
2/383 [akpm@linux-foundation.org: remove hopefully-unneeded ifdefs] Signed-off-by: Vishnu Pratap Singh <vishnu.ps@samsung.com> Cc: David Rientjes <rientjes@google.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Xishi Qiu <qiuxishi@huawei.com> Cc: Pintu Kumar <pintu.k@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 2014-12-02mm: do not overwrite reserved pages counter at show_mem()Rafael Aquini Minor fixlet to perform the reserved pages counter aggregation for each node, at show_mem() Signed-off-by: Rafael Aquini <aquini@redhat.com> Acked-by: Rik van Riel <riel@redhat.com> Acked-by: Johannes Weiner <jweiner@redhat.com> Acked-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 2014-01-21lib/show_mem.c: show num_poisoned_pages when oomXishi Qiu Show num_poisoned_pages when oom, it is a little helpful to find the reason. Also it will be emitted anytime show_mem() is called. Signed-off-by: Xishi Qiu <qiuxishi@huawei.com> Suggested-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Acked-by: Michal Hocko <mhocko@suse.cz> Acked-by: David Rientjes <rientjes@google.com> Reviewed-by: Wanpeng Li <liwanp@linux.vnet.ibm.com> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 2014-01-21mm, show_mem: remove SHOW_MEM_FILTER_PAGE_COUNTMel Gorman Commit 4b59e6c47309 ("mm, show_mem: suppress page counts in non-blockable contexts") introduced SHOW_MEM_FILTER_PAGE_COUNT to suppress PFN walks on large memory machines. Commit c78e93630d15 ("mm: do not walk all of system memory during show_mem") avoided a PFN walk in the generic show_mem helper which removes the requirement for SHOW_MEM_FILTER_PAGE_COUNT in that case. This patch removes PFN walkers from the arch-specific implementations that report on a per-node or per-zone granularity. ARM and unicore32 still do a PFN walk as they report memory usage on each bank which is a much finer granularity where the debugging information may still be of use. As the remaining arches doing PFN walks have relatively small amounts of memory, this patch simply removes SHOW_MEM_FILTER_PAGE_COUNT. [akpm@linux-foundation.org: fix parisc] Signed-off-by: Mel Gorman <mgorman@suse.de> Acked-by: David Rientjes <rientjes@google.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: James Bottomley <jejb@parisc-linux.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 2013-11-13mm: do not walk all of system memory during show_memMel Gorman It has been reported on very large machines that show_mem is taking almost 5 minutes to display information. This is a serious problem if there is an OOM storm. The bulk of the cost is in show_mem doing a very expensive PFN walk to give us the following information Total RAM: Also available as totalram_pages Highmem pages: Also available as totalhigh_pages Reserved pages: Can be inferred from the zone structure Shared pages: PFN walk required Unshared pages: PFN walk required Quick pages: Per-cpu walk required Only the shared/unshared pages requires a full PFN walk but that information is useless. It is also inaccurate as page pins of unshared pages would be accounted for as shared. Even if the information was accurate, I'm struggling to think how the shared/unshared information could be useful for debugging OOM conditions. Maybe it was useful before rmap existed when reclaiming shared pages was costly but it is less relevant today. The PFN walk could be optimised a bit but why bother as the information is useless. This patch deletes the PFN walker and infers the total RAM, highmem and reserved pages count from struct zone. It omits the shared/unshared page usage on the grounds that it is useless. It also corrects the reporting of HighMem as HighMem/MovableOnly as ZONE_MOVABLE has similar problems to HighMem with respect to lowmem/highmem exhaustion. Signed-off-by: Mel Gorman <mgorman@suse.de> Cc: David Rientjes <rientjes@google.com> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>