David Gibson
b45b5bd65f
[PATCH] hugepage: Strict page reservation for hugepage inodes ...
These days, hugepages are demand-allocated at first fault time. There's a
somewhat dubious (and racy) heuristic when making a new mmap() to check if
there are enough available hugepages to fully satisfy that mapping.
A particularly obvious case where the heuristic breaks down is where a
process maps its hugepages not as a single chunk, but as a bunch of
individually mmap()ed (or shmat()ed) blocks without touching and
instantiating the pages in between allocations. In this case the size of
each block is compared against the total number of available hugepages.
It's thus easy for the process to become overcommitted, because each block
mapping will succeed, although the total number of hugepages required by
all blocks exceeds the number available. In particular, this defeats such
a program which will detect a mapping failure and adjust its hugepage usage
downward accordingly.
The patch below addresses this problem, by strictly reserving a number of
physical hugepages for hugepage inodes which have been mapped, but not
instatiated. MAP_SHARED mappings are thus "safe" - they will fail on
mmap(), not later with an OOM SIGKILL. MAP_PRIVATE mappings can still
trigger an OOM. (Actually SHARED mappings can technically still OOM, but
only if the sysadmin explicitly reduces the hugepage pool between mapping
and instantiation)
This patch appears to address the problem at hand - it allows DB2 to start
correctly, for instance, which previously suffered the failure described
above.
This patch causes no regressions on the libhugetblfs testsuite, and makes a
test (designed to catch this problem) pass which previously failed (ppc64,
POWER5).
Signed-off-by: David Gibson <dwg@au1.ibm.com>
Cc: William Lee Irwin III <wli@holomorphy.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-22 07:54:03 -08:00
[ARM] 3366/1: Allow the 16bpp mode configuration in the CLCD control register
2006-03-16 14:10:19 +00:00
Merge branch 'origin'
2006-03-21 08:52:18 -08:00
[PATCH] NLM: Fix the NLM_GRANTED callback checks
2006-02-14 16:09:34 -08:00
[MMC] Fix mmc_cmd_type() mask
2006-02-22 09:32:46 +00:00
[PATCH] remove bogus asm/bug.h includes.
2006-02-07 20:56:35 -05:00
[NETFILTER]: ctnetlink: avoid unneccessary event message generation
2006-03-20 18:03:59 -08:00
[NETFILTER]: Restore {ipt,ip6t,ebt}_LOG compatibility
2006-02-27 13:04:17 -08:00
[NETFILTER]: Add H.323 conntrack/NAT helper
2006-03-20 23:41:17 -08:00
[NETFILTER]: x_tables: replace IPv4/IPv6 policy match by address family independant version
2006-03-20 18:03:40 -08:00
[PATCH] nfsd4: rename lk_stateowner
2006-01-18 19:20:24 -08:00
[NET]: sem2mutex part 2
2006-03-20 22:35:41 -08:00
[PATCH] suspend-to-ram: allow video options to be set at runtime
2006-02-20 20:00:10 -08:00
[AGPGART] Semaphore to Mutex conversion.
2006-01-16 20:53:46 -08:00
[PATCH] drivers/net/arcnet/: possible cleanups
2006-01-17 08:38:12 -05:00
[PATCH] libata: separate out ata_id_major_version()
2006-02-12 14:24:41 -05:00
[PATCH] fix generic_fls64()
2006-02-03 08:32:00 -08:00
[PATCH] fix sysfs interaction and lifetime rules handling for queues
2006-03-18 18:34:37 -05:00
[PATCH] select: fix returned timeval
2006-02-11 21:41:11 -08:00
[PATCH] mtd: 64 bit fixes
2006-03-09 19:47:37 -08:00
[PATCH] Make __always_inline actually force always inlining
2006-01-14 18:27:15 -08:00
[PATCH] When CONFIG_CC_OPTIMIZE_FOR_SIZE, allow gcc4 to control inlining
2006-01-14 18:27:16 -08:00
configfs: Add permission and ownership to configfs objects.
2006-02-03 14:01:05 -08:00
[PATCH] get_cpu_sysdev() signedness fix
2006-03-20 13:42:59 -08:00
[CPUFREQ] convert remaining cpufreq semaphore to a mutex
2006-01-18 13:53:45 -08:00
[PATCH] x86: don't initialise cpu_possible_map to all ones
2006-02-10 08:13:12 -08:00
[PATCH] cpuset oom lock fix
2006-01-14 18:27:10 -08:00
[CRYPTO] api: Align tfm context as wide as possible
2006-03-21 20:14:08 +11:00
[PATCH] remove bogus asm/bug.h includes.
2006-02-07 20:56:35 -05:00
[DCCP] minisock: Rename struct dccp_options to struct dccp_minisock
2006-03-20 22:50:58 -08:00
[PATCH] debugfs: Add debugfs_create_blob() helper for exporting binary data
2006-03-20 13:42:59 -08:00
[PATCH] dm: dm-table warning fix
2006-02-01 08:53:11 -08:00
[PATCH] Driver core: add macros notice(), dev_notice()
2006-03-20 13:42:59 -08:00
[DECnet]: Endian annotation and fixes for DECnet.
2006-03-20 22:42:39 -08:00
[PATCH] fix rmmod problems with elevator attributes, clean them up
2006-03-18 22:27:18 -05:00
[PATCH] Compilation of kexec/kdump broken
2006-02-03 08:32:09 -08:00
[PATCH] fbdev: Sanitize ->fb_mmap prototype
2006-01-14 18:27:15 -08:00
[PATCH] vfs: *at functions: core
2006-01-18 19:20:29 -08:00
[PATCH] fix file counting
2006-03-08 14:14:01 -08:00
[PATCH] ext3: ext3_symlink should use GFP_NOFS allocations inside
2006-03-11 09:19:34 -08:00
[PATCH] USB: EHCI for Freescale 83xx
2006-03-20 14:49:55 -08:00
[PATCH] fuse: fix async read for legacy filesystems
2006-02-01 08:53:09 -08:00
[PATCH] slab: Node rotor for freeing alien caches and remote per cpu pages.
2006-03-09 19:47:38 -08:00
[PATCH] s390: cputime misaccounting
2006-01-14 18:27:09 -08:00
[PATCH] fix next_timer_interrupt() for hrtimer
2006-03-06 18:40:44 -08:00
[PATCH] hugepage: Strict page reservation for hugepage inodes
2006-03-22 07:54:03 -08:00
V4L/DVB (3365): i2c ids for upd64031a saa717x upd64083 wm8739
2006-01-15 09:02:44 -02:00
[PATCH] I2C: Resurrect i2c_smbus_write_i2c_block_data.
2006-02-06 12:02:14 -08:00
[PATCH] I2O: fix and workaround for Motorola/Freescale controller
2006-02-03 08:32:07 -08:00
[IPV6]: ROUTE: Add support for Router Preference (RFC4191).
2006-03-20 17:04:53 -08:00
[PATCH] drivers/ide/ide-io.c: make __ide_end_request() static
2006-02-03 08:32:12 -08:00
[NET] core: add RFC2863 operstate
2006-03-20 17:09:11 -08:00
[PATCH] bonding: suppress duplicate packets
2006-03-03 20:58:00 -05:00
[SECURITY]: TCP/UDP getpeersec
2006-03-20 22:41:23 -08:00
[IPV4] ARP: Alloc acceptance of unsolicited ARP via netdevice sysctl.
2006-03-20 22:39:47 -08:00
[PATCH] x86_64: add __meminit for memory hotplug
2006-01-16 23:18:35 -08:00
[PATCH] Introduce __iowrite32_copy
2006-02-01 08:53:13 -08:00
[PATCH] sn3 iomem annotations and fixes
2006-02-08 01:03:52 -05:00
[IPV6]: ROUTE: Add accept_ra_rt_info_max_plen sysctl.
2006-03-20 17:07:03 -08:00
[IPV6]: ROUTE: Add experimental support for Route Information Option in RA (RFC4191).
2006-03-20 17:06:24 -08:00
[IRDA]: TOIM3232 dongle support
2006-03-20 22:21:10 -08:00
[PATCH] jbd: revert checkpoint list changes
2006-02-14 16:09:34 -08:00
[PATCH] tty buffering stall fix
2006-02-10 08:13:12 -08:00
[PATCH] x86_64: Add boot option to disable randomized mappings and cleanup
2006-02-17 08:00:40 -08:00
[PATCH] kexec: fix in free initrd when overlapped with crashkernel region
2006-02-10 08:13:12 -08:00
[PATCH] Increase max kmalloc size for very large systems
2006-03-06 18:40:44 -08:00
[PATCH] kobj_map semaphore to mutex conversion
2006-03-20 13:42:58 -08:00
[PATCH] kobject_add_dir
2006-03-20 13:42:59 -08:00
[PATCH] hrtimer: fix multiple macro argument expansion
2006-02-15 15:32:22 -08:00
[PATCH] libata: improve xfer mask constants and update ata_mode_string()
2006-03-11 19:03:38 -05:00
[LIST]: Introduce list_for_each_entry_from
2006-03-20 17:19:17 -08:00
[PATCH] memory-hotplug compile fix
2006-03-06 18:40:44 -08:00
[PATCH] NUMA policies in the slab allocator V2
2006-01-18 19:20:18 -08:00
[PATCH] mm: optimise page_count
2006-03-22 07:54:02 -08:00
[PATCH] mm: less atomic ops
2006-03-22 07:53:57 -08:00
[PATCH] GFP_ZONETYPES: calculate from GFP_ZONEMASK
2006-02-01 08:53:15 -08:00
[PATCH] fix module sysfs files reference counting
2006-03-20 13:42:58 -08:00
[PATCH] mv643xx_eth: Clean up platform_data configuration
2006-01-27 11:11:16 -05:00
[PATCH] vfs: *at functions: core
2006-01-18 19:20:29 -08:00
[PATCH] unshare system call -v5: unshare namespace
2006-02-07 16:12:34 -08:00
[PATCH] ncpfs: remove kmalloc wrapper
2006-01-14 18:27:12 -08:00
[NET]: {get|set}sockopt compatibility layer
2006-03-20 22:45:21 -08:00
[NET]: dev_put/dev_hold cleanup
2006-03-20 22:32:28 -08:00
[NET]: {get|set}sockopt compatibility layer
2006-03-20 22:45:21 -08:00
[BRIDGE]: netfilter inline cleanup
2006-03-20 22:58:21 -08:00
[NETFILTER]: Fix xfrm lookup after SNAT
2006-02-15 01:34:23 -08:00
[NETLINK]: Add netlink_has_listeners for avoiding unneccessary event message generation
2006-03-20 18:52:01 -08:00
[PATCH] Fix compile for CONFIG_SYSVIPC=n or CONFIG_SYSCTL=n
2006-02-20 20:00:11 -08:00
[PATCH] remove bogus asm/bug.h includes.
2006-02-07 20:56:35 -05:00
[PATCH] mm: page_state comment more
2006-03-22 07:53:58 -08:00
[PATCH] parport: add parallel port support for SGI O2
2006-02-03 08:32:05 -08:00
[PATCH] PCI: drivers/pci/pci.c: #if 0 pci_find_ext_capability()
2006-01-31 18:00:11 -08:00
[TG3]: Add 5787 and 5754 basic support
2006-03-20 22:27:35 -08:00
[PATCH] percpu_counter_sum()
2006-03-08 14:14:01 -08:00
Fix "stuct", "strut", "struc" typos
2006-01-15 02:12:54 +01:00
[PATCH] pktcdvd: Allow larger packets
2006-02-05 11:06:52 -08:00
[PATCH] Add pselect/ppoll system call implementation
2006-01-18 19:20:30 -08:00
[PATCH] kernel/posix-timers.c: remove do_posix_clock_notimer_create()
2006-02-01 08:53:13 -08:00
[PATCH] fix zap_thread's ptrace related problems
2006-02-15 11:05:43 -08:00
[PATCH] quota: remove unused sync_dquots_dev()
2006-02-03 08:32:08 -08:00
[PATCH] rcu batch tuning
2006-03-08 14:14:01 -08:00
[PATCH] reiserfs_get_acl() build fix
2006-02-05 11:06:52 -08:00
[PATCH] reiserfs: fix unaligned bitmap usage
2006-03-02 10:37:59 -08:00
[PATCH] reiserfs: remove kmalloc wrapper
2006-02-01 08:53:25 -08:00
[PATCH] reiserfs: remove reiserfs_permission_locked
2006-02-01 08:53:25 -08:00
[PATCH] Direct Migration V9: remove_from_swap() to remove swap ptes
2006-02-01 08:53:16 -08:00
[PATCH] rtc.h broke strace(1) builds
2006-03-22 07:53:55 -08:00
[NET] rtnetlink: Add RTPROT entry for Netsukuku.
2006-03-20 22:26:17 -08:00
[PATCH] remove __put_task_struct_cb export again
2006-03-11 09:19:34 -08:00
[SECURITY]: TCP/UDP getpeersec
2006-03-20 22:41:23 -08:00
[SERIAL] Make uart_port flags a bitwise type
2006-01-21 23:03:28 +00:00
[SPARC64]: Add SUN4V Hypervisor Console driver.
2006-03-20 01:12:18 -08:00
[SERIAL] Trivial comment fix: include/linux/serial_reg.h
2006-02-23 09:49:35 +00:00
[PATCH] Add tmpfs options for memory placement policies
2006-01-14 18:27:07 -08:00
[NET]: Replace skb_pull/skb_postpull_rcsum with skb_pull_rcsum
2006-03-20 22:43:56 -08:00
[PATCH] slab: Remove SLAB_NO_REAP option
2006-03-22 07:53:59 -08:00
[PATCH] smbfs: remove kmalloc wrapper
2006-01-14 18:27:13 -08:00
[PATCH] on_each_cpu(): disable local interrupts
2006-03-22 07:53:59 -08:00
[SECURITY]: TCP/UDP getpeersec
2006-03-20 22:41:23 -08:00
[PATCH] Fix build failure in recent pm_prepare_* changes.
2006-02-07 16:12:33 -08:00
[PATCH] vmscan: use unsigned longs
2006-03-22 07:54:00 -08:00
[PATCH] flags parameter for linkat
2006-02-24 14:31:39 -08:00
[TCP]: sysctl to allow TCP window > 32767 sans wscale
2006-03-20 22:40:29 -08:00
[TCP] mtu probing: move tcp-specific data out of inet_connection_sock
2006-03-20 21:32:58 -08:00
[PATCH] select: fix returned timeval
2006-02-11 21:41:11 -08:00
[PATCH] Provide an interface for getting the current tick length
2006-02-17 08:24:29 -08:00
[TIPC] Updated link priority macros
2006-01-18 00:45:15 +01:00
[PATCH] Zone reclaim: Reclaim logic
2006-01-18 19:20:17 -08:00
[PATCH] tty buffering stall fix
2006-02-10 08:13:12 -08:00
[PATCH] tty buffering stall fix
2006-02-10 08:13:12 -08:00
[PATCH] Define BITS_PER_BYTE
2006-02-01 08:53:13 -08:00
[PATCH] ufs: fix char vs. __s8 clash in ufs
2006-02-03 08:32:05 -08:00
[PATCH] ufs: fix oops with `ufs1' type
2006-02-03 08:32:04 -08:00
[PATCH] USB: drivers/usb/core/message.c: make usb_get_string() static
2006-03-20 14:49:54 -08:00
[PATCH] USB: USB authentication states
2006-01-31 17:23:44 -08:00
[PATCH] USB: gadget driver section fixups
2006-03-20 14:49:58 -08:00
Merge branch 'origin'
2006-03-21 08:52:18 -08:00
[XFRM]: Rearrange struct xfrm_aevent_id for better compatibility.
2006-03-20 21:25:50 -08:00
