https://bugzilla.novell.com/show_bug.cgi?id=655221 https://bugzilla.novell.com/show_bug.cgi?id=655221#c0 Summary: ext4_alloc_context consumes all memory (is it leaking?) Classification: openSUSE Product: openSUSE 11.3 Version: Final Platform: x86-64 OS/Version: openSUSE 11.3 Status: NEW Severity: Major Priority: P5 - None Component: Basesystem AssignedTo: bnc-team-screening@forge.provo.novell.com ReportedBy: bartoschek@or.uni-bonn.de QAContact: qa@suse.de Found By: --- Blocker: --- User-Agent: Mozilla/5.0 (compatible; Konqueror/4.4; Linux) KHTML/4.4.4 (like Gecko) SUSE On a machine I have several jobs running that are CPU-bound. The total virtual memory of the processes is smaller than the machine memory. However the system is permanently paging and the processes only get 1-2% cpu usage. /proc/meminfo tells us: MemTotal: 198493288 kB MemFree: 853372 kB Buffers: 824 kB Cached: 26108 kB SwapCached: 6369336 kB Active: 37073576 kB Inactive: 1104932 kB Active(anon): 37059712 kB Inactive(anon): 1090980 kB Active(file): 13864 kB Inactive(file): 13952 kB Unevictable: 0 kB Mlocked: 0 kB SwapTotal: 209713148 kB SwapFree: 149362056 kB Dirty: 16 kB Writeback: 0 kB AnonPages: 37642012 kB Mapped: 13312 kB Shmem: 0 kB Slab: 158765316 kB SReclaimable: 158732380 kB SUnreclaim: 32936 kB KernelStack: 2968 kB PageTables: 202500 kB NFS_Unstable: 4 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 308959792 kB Committed_AS: 64376360 kB VmallocTotal: 34359738367 kB VmallocUsed: 736572 kB VmallocChunk: 34358994676 kB We see that over 150 GiB are allocated for Slab and not given to the processes. Here is the output of slabtop: Active / Total Objects (% used) : 364597 / 1070670469 (0.0%) Active / Total Slabs (% used) : 52397 / 39688960 (0.1%) Active / Total Caches (% used) : 107 / 193 (55.4%) Active / Total Size (% used) : 159579.25K / 150697605.41K (0.1%) Minimum / Average / Maximum Object : 0.02K / 0.14K / 4096.00K OBJS ACTIVE USE OBJ SIZE SLABS OBJ/SLAB CACHE SIZE NAME 1070187012 0 0% 0.14K 39636556 27 158546224K ext4_alloc_context We see that ext4_alloc_context uses a tremendous amount of memory without giving it to the processes. The machine uses ext4 only for the local base installation. All used data comes via NFS. I do not see why ext4 should use so much memory. In addition to the slow progress of our jobs the system is very sluggish. Reproducible: Didn't try Steps to Reproduce: The problem is currently occuring and I am not sure whether it will diretly occur again. We installed 11.3 on the machine 10 days ago and it ran fine till now. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.