- 14 Dec, 2007 19 commits
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Avi Kivity authored
patch cf5a94d1 in mainline. 'invd' can destroy host data, and 'wbinvd' allows the guest to induce long (milliseconds) latencies. Noted by Ben Serebrin. Signed-off-by:
Avi Kivity <avi@qumranet.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@suse.de>
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Avi Kivity authored
patch 651a3e29 in mainline. Emulate the 'invd' instruction (opcode 0f 08). Signed-off-by:
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Aurelien Jarno authored
patch 4e62417b in mainline. The patch belows changes the access type to register from memory for instructions that are declared as SrcMem or DstMem, but have a ModR/M byte with Mod = 3. It fixes (at least) the lmsw and smsw instructions on an AMD64 CPU, which are needed for FreeBSD. Signed-off-by:
Aurelien Jarno <aurelien@aurel32.net> Signed-off-by:
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Sheng Yang authored
patch a012e65a in mainline. Implement emulation of instruction: movnti m32/m64, r32/r64 opcode: 0x0f 0xc3 Needed to support Linux 2.6.16 as guest (used for mmio). Signed-off-by:
Sheng Yang <sheng.yang@intel.com> Signed-off-by:
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Thomas Gleixner authored
patch 62f0f61e in mainline Relative hrtimers with a large timeout value might end up as negative timer values, when the current time is added in hrtimer_start(). This in turn is causing the clockevents_set_next() function to set an huge timeout and sleep for quite a long time when we have a clock source which is capable of long sleeps like HPET. With PIT this almost goes unnoticed as the maximum delta is ~27ms. The non-hrt/nohz code sorts this out in the next timer interrupt, so we never noticed that problem which has been there since the first day of hrtimers. This bug became more apparent in 2.6.24 which activates HPET on more hardware. Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Ayaz Abdulla authored
patch 9e555930 in mainline. Fix a long boot delay in the forcedeth driver. During initialization, the timeout for the handshake between mgmt unit and driver can be very long. The patch reduces the timeout by eliminating a extra loop around the timeout logic. Addresses http://bugzilla.kernel.org/show_bug.cgi?id=9308Signed-off-by:
Ayaz Abdulla <aabdulla@nvidia.com> Cc: Alex Howells <astinus@gentoo.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Jeff Garzik <jeff@garzik.org> Signed-off-by:
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Ayaz Abdulla authored
patch 490dde89 in mainline. This patch adds new device ids and features for mcp79 devices into the forcedeth driver. Signed-off-by:
Jeff Garzik <jgarzik@redhat.com> Signed-off-by:
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Karsten Keil authored
patch eafe1aa3 in mainline. Fix possible memory overrun issue in the isdn ioctl code. Found by ADLAB <adlab@venustech.com.cn> Signed-off-by:
Karsten Keil <kkeil@suse.de> Cc: ADLAB <adlab@venustech.com.cn> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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Hugh Dickins authored
patch e84e2e13 in mainline tmpfs was misconverted to __GFP_ZERO in 2.6.11. There's an unusual case in which shmem_getpage receives the page from its caller instead of allocating. We must cover this case by clear_highpage before SetPageUptodate, as before. Signed-off-by:
Hugh Dickins <hugh@veritas.com> Signed-off-by:
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David Brownell authored
patch 1cb52658 in mainline. A recent patch added software synchronization during EHCI startup, so ports aren't switched away from the companion controllers after resets have started. This patch adds a short delay letting hardware finish that port switching before any new resets begin ... so both ends of that hardware race window are closed. Signed-off-by:
David Brownell <dbrownell@users.sourceforge.net> Cc: Dave Miller <davem@davemloft.net> Cc: Dely Sy <dely.l.sy@intel.com> Cc: Alan Stern <stern@rowland.harvard.edu> Signed-off-by:
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Oliver Neukum authored
patch 5cf1973a in mainline to make HAL like the microtek driver's devices the parent must be correctly set. Signed-off-by:
Oliver Neukum <oneukum@suse.de> Signed-off-by:
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William Pettersson authored
changeset dac4ae0d in mainline. Input: ALPS - add support for model found in Dell Vostro 1400 Signed-off-by:
William Pettersson <william.pettersson@gmail.com> Signed-off-by:
Dmitry Torokhov <dtor@mail.ru> Cc: Chuck Ebbert <cebbert@redhat.com> Signed-off-by:
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Herbert Xu authored
patch a98ce5c6 in mainline. Fix synchronize_irq races with IRQ handler As it is some callers of synchronize_irq rely on memory barriers to provide synchronisation against the IRQ handlers. For example, the tg3 driver does tp->irq_sync = 1; smp_mb(); synchronize_irq(); and then in the IRQ handler: if (!tp->irq_sync) netif_rx_schedule(dev, &tp->napi); Unfortunately memory barriers only work well when they come in pairs. Because we don't actually have memory barriers on the IRQ path, the memory barrier before the synchronize_irq() doesn't actually protect us. In particular, synchronize_irq() may return followed by the result of netif_rx_schedule being made visible. This patch (mostly written by Linus) fixes this by using spin locks instead of memory barries on the synchronize_irq() path. Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Acked-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Peter P Waskiewicz Jr authored
[PKT_SCHED]: Check subqueue status before calling hard_start_xmit [ Upstream commit: 5f1a485d ] The only qdiscs that check subqueue state before dequeue'ing are PRIO and RR. The other qdiscs, including the default pfifo_fast qdisc, will allow traffic bound for subqueue 0 through to hard_start_xmit. The check for netif_queue_stopped() is done above in pkt_sched.h, so it is unnecessary for qdisc_restart(). However, if the underlying driver is multiqueue capable, and only sets queue states on subqueues, this will allow packets to enter the driver when it's currently unable to process packets, resulting in expensive requeues and driver entries. This patch re-adds the check for the subqueue status before calling hard_start_xmit, so we can try and avoid the driver entry when the queues are stopped. Signed-off-by:
Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Cc: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Zou Nan hai authored
patch ace8b3d6 in mainline. cache_nice_tries and flags entry do not appear in proc fs sched_domain directory, because ctl_table entry is skipped. This patch fixes the issue. Signed-off-by:
Zou Nan hai <nanhai.zou@intel.com> Signed-off-by:
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Christian Borntraeger authored
commit 5d0360ee upstream. We have seen ramdisk based install systems, where some pages of mapped libraries and programs were suddendly zeroed under memory pressure. This should not happen, as the ramdisk avoids freeing its pages by keeping them dirty all the time. It turns out that there is a case, where the VM makes a ramdisk page clean, without telling the ramdisk driver. On memory pressure shrink_zone runs and it starts to run shrink_active_list. There is a check for buffer_heads_over_limit, and if true, pagevec_strip is called. pagevec_strip calls try_to_release_page. If the mapping has no releasepage callback, try_to_free_buffers is called. try_to_free_buffers has now a special logic for some file systems to make a dirty page clean, if all buffers are clean. Thats what happened in our test case. The simplest solution is to provide a noop-releasepage callback for the ramdisk driver. This avoids try_to_free_buffers for ramdisk pages. Signed-off-by:
Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by:
Jan Kara <jack@suse.cz> Acked-by:
Nick Piggin <npiggin@suse.de> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by:
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Evgeniy Polyakov authored
[NETFILTER]: Fix NULL pointer dereference in nf_nat_move_storage() [ Upstream commit: 77996525 ] Reported by Chuck Ebbert as: https://bugzilla.redhat.com/show_bug.cgi?id=259501#c14 This routine is called each time hash should be replaced, nf_conn has extension list which contains pointers to connection tracking users (like nat, which is right now the only such user), so when replace takes place it should copy own extensions. Loop above checks for own extension, but tries to move higer-layer one, which can lead to above oops. Signed-off-by:
Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by:
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Eric Dumazet authored
[NET] random : secure_tcp_sequence_number should not assume CONFIG_KTIME_SCALAR [ Upstream commit: 6dd10a62 ] All 32 bits machines but i386 dont have CONFIG_KTIME_SCALAR. On these machines, ktime.tv64 is more than 4 times the (correct) result given by ktime_to_ns() Again on these machines, using ktime_get_real().tv64 >> 6 give a 32bits rollover every 64 seconds, which is not wanted (less than the 120 s MSL) Using ktime_to_ns() is the portable way to get nsecs from a ktime, and have correct code. Signed-off-by:
Eric Dumazet <dada1@cosmosbay.com> Signed-off-by:
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Marcelo Tosatti authored
patch 29f5f2a1 in mainline. Properly account for queue commands, this fixes a problem reported by Holger Schurig when using the debugfs interface. Signed-off-by:
Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by:
John W. Linville <linville@tuxdriver.com> Signed-off-by:
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- 26 Nov, 2007 21 commits
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Greg Kroah-Hartman authored
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Dan Williams authored
patch 0b531676 in mainline. ipw2200 makes extensive use of background scanning when unassociated or down. Unfortunately, the firmware sends scan completed events many times per second, which the driver pushes directly up to userspace. This needlessly wakes up processes listening for wireless events many times per second. Batch together scan completed events for non-user-requested scans and send them up to userspace every 4 seconds. Scan completed events resulting from an SIOCSIWSCAN call are pushed up without delay. Signed-off-by:
Dan Williams <dcbw@redhat.com> Signed-off-by:
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Ortwin Glück authored
patch d466a919 in mainline. Not surprisingly the Nikon D40X DSC needs the same quirks as the D40, but it has a separate ID. See http://bugs.gentoo.org/show_bug.cgi?id=191431 From: Ortwin Glück <odi@odi.ch> Cc: Tobias Powalowski <t.powa@gmx.de> Signed-off-by:
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Phil Dibowitz authored
patch 16eb345f in mainline. Upgrade the unusual_devs.h file to support the Nikon D200 Signed-off-by:
Mike Pagano <mpagano-kernel@mpagano.com> Signed-off-by:
Phil Dibowitz <phil@ipom.com> Cc: Tobias Powalowski <t.powa@gmx.de> Signed-off-by:
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Ingo Molnar authored
patch a3b13c23 in mainline. sched_clock() is not a reliable time-source, use cpu_clock() instead. Signed-off-by:
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Ingo Molnar authored
This is a merge of commits a5f2ce3c and 43581a10 in mainline to fix a warning in the 2.6.23.3 kernel release. softlockup watchdog: style cleanups kernel/softirq.c grew a few style uncleanlinesses in the past few months, clean that up. No functional changes: text data bss dec hex filename 1126 76 4 1206 4b6 softlockup.o.before 1129 76 4 1209 4b9 softlockup.o.after ( the 3 bytes .text increase is due to the "<1>" appended to one of the printk messages. ) Signed-off-by:
Satyam Sharma <satyam@infradead.org> Signed-off-by:
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David P. Reed authored
patch c399da0d in mainline. x86: fix freeze in x86_64 RTC update code in time_64.c Fix hard freeze on x86_64 when the ntpd service calls update_persistent_clock() A repeatable but randomly timed freeze has been happening in Fedora 6 and 7 for the last year, whenever I run the ntpd service on my AMD64x2 HP Pavilion dv9000z laptop. This freeze is due to the use of spin_lock(&rtc_lock) under the assumption (per a bad comment) that set_rtc_mmss is called only with interrupts disabled. The call from ntp.c to update_persistent_clock is made with interrupts enabled. [ tglx@linutronix.de: ported to 2.6.23.stable ] Signed-off-by:
David P. Reed <dpreed@reed.com> Signed-off-by:
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David P. Reed authored
patch fa6a1a55 in mainline. ntp: fix typo that makes sync_cmos_clock erratic Fix a typo in ntp.c that has caused updating of the persistent (RTC) clock when synced to NTP to behave erratically. When debugging a freeze that arises on my AMD64 machines when I run the ntpd service, I added a number of printk's to monitor the sync_cmos_clock procedure. I discovered that it was not syncing to cmos RTC every 11 minutes as documented, but instead would keep trying every second for hours at a time. The reason turned out to be a typo in sync_cmos_clock, where it attempts to ensure that update_persistent_clock is called very close to 500 msec. after a 1 second boundary (required by the PC RTC's spec). That typo referred to "xtime" in one spot, rather than "now", which is derived from "xtime" but not equal to it. This makes the test erratic, creating a "coin-flip" that decides when update_persistent_clock is called - when it is called, which is rarely, it may be at any time during the one second period, rather than close to 500 msec, so the value written is needlessly incorrect, too. Signed-off-by:
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Andrey Mirkin authored
patch 1c5b5cfd in mainline. x86: return correct error code from child_rip in x86_64 entry.S Right now register edi is just cleared before calling do_exit. That is wrong because correct return value will be ignored. Value from rax should be copied to rdi instead of clearing edi. AK: changed to 32bit move because it's strictly an int [ tglx: arch/x86 adaptation ] Signed-off-by:
Andrey Mirkin <major@openvz.org> Signed-off-by:
Andi Kleen <ak@suse.de> Signed-off-by:
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Huang, Ying authored
patch 84e0fdb1 in mainline. x86: NX bit handling in change_page_attr() This patch fixes a bug of change_page_attr/change_page_attr_addr on Intel x86_64 CPUs. After changing page attribute to be executable with these functions, the page remains un-executable on Intel x86_64 CPU. Because on Intel x86_64 CPU, only if the "NX" bits of all four level page tables are cleared, the corresponding page is executable (refer to section 4.13.2 of Intel 64 and IA-32 Architectures Software Developer's Manual). So, the bug is fixed through clearing the "NX" bit of PMD when splitting the huge PMD. Signed-off-by:
Huang Ying <ying.huang@intel.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by:
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Kirill Korotaev authored
patch c1217a75 in mainline. x86: mark read_crX() asm code as volatile Some gcc versions (I checked at least 4.1.1 from RHEL5 & 4.1.2 from gentoo) can generate incorrect code with read_crX()/write_crX() functions mix up, due to cached results of read_crX(). The small app for x8664 below compiled with -O2 demonstrates this (i686 does the same thing): Signed-off-by:
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Andrew Hastings authored
patch 801916c1 in mainline. x86: fix off-by-one in find_next_zero_string Fix an off-by-one error in find_next_zero_string which prevents allocating the last bit. [ tglx: arch/x86 adaptation ] Signed-off-by:
Andrew Hastings <abh@cray.com> Signed-off-by:
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Jan Beulich authored
patch aa506dc7 in mainline. i386: avoid temporarily inconsistent pte-s One more of these issues (which were considered fixed a few releases back): other than on x86-64, i386 allows set_fixmap() to replace already present mappings. Consequently, on PAE, care must be taken to not update the high half of a pte while the low half is still holding the old value. [tglx: arch/x86 adaptation] Signed-off-by:
Jan Beulich <jbeulich@novell.com> Signed-off-by:
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Herbert Xu authored
It's upstream changeset ef19454b. [LIB] crc32c: Keep intermediate crc state in cpu order crypto/crc32.c:chksum_final() is computing the digest as *(__le32 *)out = ~cpu_to_le32(mctx->crc); so the low-level crc32c_le routines should just keep the crc in cpu order, otherwise it is getting swabbed one too many times on big-endian machines. Signed-off-by:
Benny Halevy <bhalevy@fs1.bhalevy.com> Signed-off-by:
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Sebastian Siewior authored
patch 2e21630d in mainline. Currently the Geode AES module fails to encrypt or decrypt if the coherent bits are not set what is currently the case if the encryption does not occur inplace. However, the encryption works on my Geode machine _only_ if the coherent bits are always set. Signed-off-by:
Sebastian Siewior <sebastian@breakpoint.cc> Acked-by:
Jordan Crouse <jordan.crouse@amd.com> Signed-off-by:
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Chuck Ebbert authored
No patch in mainline as this logic has been removed from 2.6.24 so it is not necessary. https://bugzilla.redhat.com/show_bug.cgi?id=340161 The problem code has been removed in 2.6.24. The below patch disables SCHED_FEAT_PRECISE_CPU_LOAD which causes the offending code to be skipped but does not prevent the user from enabling it. The divide-by-zero is here in kernel/sched.c: static void update_cpu_load(struct rq *this_rq) { u64 fair_delta64, exec_delta64, idle_delta64, sample_interval64, tmp64; unsigned long total_load = this_rq->ls.load.weight; unsigned long this_load = total_load; struct load_stat *ls = &this_rq->ls; int i, scale; this_rq->nr_load_updates++; if (unlikely(!(sysctl_sched_features & SCHED_FEAT_PRECISE_CPU_LOAD))) goto do_avg; /* Update delta_fair/delta_exec fields first */ update_curr_load(this_rq); fair_delta64 = ls->delta_fair + 1; ls->delta_fair = 0; exec_delta64 = ls->delta_exec + 1; ls->delta_exec = 0; sample_interval64 = this_rq->clock - ls->load_update_last; ls->load_update_last = this_rq->clock; if ((s64)sample_interval64 < (s64)TICK_NSEC) sample_interval64 = TICK_NSEC; if (exec_delta64 > sample_interval64) exec_delta64 = sample_interval64; idle_delta64 = sample_interval64 - exec_delta64; ======> tmp64 = div64_64(SCHED_LOAD_SCALE * exec_delta64, fair_delta64); tmp64 = div64_64(tmp64 * exec_delta64, sample_interval64); this_load = (unsigned long)tmp64; do_avg: /* Update our load: */ for (i = 0, scale = 1; i < CPU_LOAD_IDX_MAX; i++, scale += scale) { unsigned long old_load, new_load; /* scale is effectively 1 << i now, and >> i divides by scale */ old_load = this_rq->cpu_load[i]; new_load = this_load; this_rq->cpu_load[i] = (old_load*(scale-1) + new_load) >> i; } } For stable only; the code has been removed in 2.6.24. Signed-off-by:
Chuck Ebbert <cebbert@redhat.com> Acked-by:
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Alexey Starikovskiy authored
patch 63f0edfc in mainline. ACPI: VIDEO: Adjust current level to closest available one. Signed-off-by:
Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by:
Len Brown <len.brown@intel.com> Cc: Tobias Powalowski <t.powa@gmx.de> Signed-off-by:
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Jeff Garzik authored
patch 96af1547 in mainline. [libata] sata_sis: use correct S/G table size sata_sis has the same restrictions as other SFF controllers, and so must use LIBATA_MAX_PRD to denote that SCSI may only fill ATA_MAX_PRD/2 entries, due to our need to handle IOMMU merging. Signed-off-by:
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Tejun Heo authored
patch aaa092a1 in mainline. sata_sis: fix SCR read breakage SCR read for controllers which uses PCI configuration space for SCR access got broken while adding @val argument to SCR accessors. Fix it. Signed-off-by:
Tejun Heo <htejun@gmail.com> Signed-off-by:
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Fengguang Wu authored
patch c06a018f in mainline. This is not a new problem in 2.6.23-git17. 2.6.22/2.6.23 is buggy in the same way. Reiserfs could accumulate dirty sub-page-size files until umount time. They cannot be synced to disk by pdflush routines or explicit `sync' commands. Only `umount' can do the trick. The direct cause is: the dirty page's PG_dirty is wrongly _cleared_. Call trace: [<ffffffff8027e920>] cancel_dirty_page+0xd0/0xf0 [<ffffffff8816d470>] :reiserfs:reiserfs_cut_from_item+0x660/0x710 [<ffffffff8816d791>] :reiserfs:reiserfs_do_truncate+0x271/0x530 [<ffffffff8815872d>] :reiserfs:reiserfs_truncate_file+0xfd/0x3b0 [<ffffffff8815d3d0>] :reiserfs:reiserfs_file_release+0x1e0/0x340 [<ffffffff802a187c>] __fput+0xcc/0x1b0 [<ffffffff802a1ba6>] fput+0x16/0x20 [<ffffffff8029e676>] filp_close+0x56/0x90 [<ffffffff8029fe0d>] sys_close+0xad/0x110 [<ffffffff8020c41e>] system_call+0x7e/0x83 Fix the bug by removing the cancel_dirty_page() call. Tests show that it causes no bad behaviors on various write sizes. === for the patient === Here are more detailed demonstrations of the problem. 1) the page has both PG_dirty(D)/PAGECACHE_TAG_DIRTY(d) after being written to; and then only PAGECACHE_TAG_DIRTY(d) remains after the file is closed. ------------------------------ screen 0 ------------------------------ [T0] root /home/wfg# cat > /test/tiny [T1] hi [T2] root /home/wfg# ------------------------------ screen 1 ------------------------------ [T1] root /home/wfg# echo /test/tiny > /proc/filecache [T1] root /home/wfg# cat /proc/filecache # file /test/tiny # flags R:referenced A:active M:mmap U:uptodate D:dirty W:writeback O:owner B:buffer d:dirty w:writeback # idx len state refcnt 0 1 ___UD__Bd_ 2 [T2] root /home/wfg# cat /proc/filecache # file /test/tiny # flags R:referenced A:active M:mmap U:uptodate D:dirty W:writeback O:owner B:buffer d:dirty w:writeback # idx len state refcnt 0 1 ___U___Bd_ 2 2) note the non-zero 'cancelled_write_bytes' after /tmp/hi is copied. ------------------------------ screen 0 ------------------------------ [T0] root /home/wfg# echo hi > /tmp/hi [T1] root /home/wfg# cp /tmp/hi /dev/stdin /test [T2] hi [T3] root /home/wfg# ------------------------------ screen 1 ------------------------------ [T1] root /proc/4397# cd /proc/`pidof cp` [T1] root /proc/4713# cat io rchar: 8396 wchar: 3 syscr: 20 syscw: 1 read_bytes: 0 write_bytes: 20480 cancelled_write_bytes: 4096 [T2] root /proc/4713# cat io rchar: 8399 wchar: 6 syscr: 21 syscw: 2 read_bytes: 0 write_bytes: 24576 cancelled_write_bytes: 4096 //Question: the 'write_bytes' is a bit more than expected ;-) Tested-by:
Maxim Levitsky <maximlevitsky@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Jeff Mahoney <jeffm@suse.com> Signed-off-by:
Fengguang Wu <wfg@mail.ustc.edu.cn> Reviewed-by:
Chris Mason <chris.mason@oracle.com> Signed-off-by:
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Andrew Morton authored
patch 35d5d08a in mainline. Marin Mitov points out that delay_tsc() can misbehave if it is preempted and rescheduled on a different CPU which has a skewed TSC. Fix it by disabling preemption. (I assume that the worst-case behaviour here is a stall of 2^32 cycles) Cc: Andi Kleen <ak@suse.de> Cc: Marin Mitov <mitov@issp.bas.bg> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
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