(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Thu, 28 Jul 2011 12:41:03 GMT bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=40262 Two people are reporting this - there are some additional details in bugzilla. We seem to be going around in circles here. I'll ask Rafael and Maciej to track this as a regression :( > Summary: PROBLEM: I/O storm from hell on kernel 3.0.0 when > touch swap (swapfile or partition) > Product: Memory Management > Version: 2.5 > Kernel Version: 3.0.0 > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: Other > AssignedTo: akpm@xxxxxxxxxxxxxxxxxxxx > ReportedBy: g0re@xxxxxxxx > Regression: No > > > Created an attachment (id=66982) > --> (https://bugzilla.kernel.org/attachment.cgi?id=66982) > kernel config based on ARCH linux distro > > issue occurs in new kernel 3.0. > does not occurs in 2.6.39.3/2.6.38.8 > > copy a file bigger than ram size (tar/cp/scp/dd/smb , local and remote) > load some .torrent with rtorrent (debian dvd isofiles) > > observed in 3.0, the cache is not shrinking when another app request ram and > swap occurs (mouse lag+keyboard lag+window redraw lag+ssh lag...) > observed in 2.6.3x.y, the cache is shrinking when another app request ram > (opera/thunderbird/seamonkey/rdesktop) and swap occurs only when the cache is > very low (and smoothly) > > tested I/O schedulers: noop deadline cfq (no difference) > tested FS: XFS, JFS, EXT4, reiser3 (no difference) > tested HDDs: WDC WD400BB-60JKA0 (40GB - PATA) (to test pata_via) > SAMSUNG SP0802N (80GB - PATA) (to test pata_via) > SAMSUNG HD103SI (1TB - SATA) (to test sata_via) > SAMSUNG HM100UX (1TB - SATA) (to test sata_via) > > obs: > nice -n 20 ionice -c3 trick does not work > tune vfs_cache_pressure/swappiness/dirty_ratio/dirty_background_ratio does not > help too > > some nfo when storm begins > /proc/meminfo > MemTotal: 446532 kB > MemFree: 5392 kB > Buffers: 3664 kB > Cached: 368872 kB > SwapCached: 20412 kB > Active: 89000 kB > Inactive: 331392 kB > Active(anon): 23048 kB > Inactive(anon): 24840 kB > Active(file): 65952 kB > Inactive(file): 306552 kB > Unevictable: 0 kB > Mlocked: 0 kB > HighTotal: 0 kB > HighFree: 0 kB > LowTotal: 446532 kB > LowFree: 5392 kB > SwapTotal: 681980 kB > SwapFree: 600028 kB > Dirty: 20 kB > Writeback: 0 kB > AnonPages: 37972 kB > Mapped: 31592 kB > Shmem: 16 kB > Slab: 12304 kB > SReclaimable: 7596 kB > SUnreclaim: 4708 kB > KernelStack: 696 kB > PageTables: 960 kB > NFS_Unstable: 0 kB > Bounce: 0 kB > WritebackTmp: 0 kB > CommitLimit: 905244 kB > Committed_AS: 187440 kB > VmallocTotal: 573496 kB > VmallocUsed: 5032 kB > VmallocChunk: 565776 kB > HardwareCorrupted: 0 kB > AnonHugePages: 0 kB > HugePages_Total: 0 > HugePages_Free: 0 > HugePages_Rsvd: 0 > HugePages_Surp: 0 > Hugepagesize: 4096 kB > DirectMap4k: 24512 kB > DirectMap4M: 434176 kB > > extra: /proc/cmdline == printk.time=1 noisapnp libata.force=noncq logo.nologo > maxcpus=4 nohz=off pci=nomsi pcie_pme=nomsi vga=normal video=vesafb:ywrap > elevator=cfq libata.force=1.5Gbps loglevel=7 > > ... > -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>