- 12 Dec, 2006 13 commits
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FUJITA Tomonori authored
This patch fixes bio leaks in SG_IO. rq->bio can be changed after io completion, so we need to reset rq->bio before calling blk_rq_unmap_user() http://marc.theaimsgroup.com/?l=linux-kernel&m=116570666807983&w=2Signed-off-by:
FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by:
Jens Axboe <jens.axboe@oracle.com>
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Boaz Harrosh authored
While working on bidi support at struct request level I have found that blk_queue_activity_fn is actually never used. The only user is in ide-probe.c with this code: /* enable led activity for disk drives only */ if (drive->media == ide_disk && hwif->led_act) blk_queue_activity_fn(q, hwif->led_act, drive); And led_act is never initialized anywhere. (Looking back at older kernels it was used in the PPC arch, but was removed around 2.6.18) Unless it is all for future use off course. (this patch is against linux-2.6-block.git as off 2006/12/4) Signed-off-by:
Boaz Harrosh <bharrosh@panasas.com> Signed-off-by:
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Linus Torvalds authored
* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: (32 commits) [NETPOLL]: Fix local_bh_enable() warning. [IPVS]: Make ip_vs_sync.c <= 80col wide. [IPVS]: Use msleep_interruptable() instead of ssleep() aka msleep() [HAMRADIO]: Fix baycom_epp.c compile failure. [DCCP]: Whitespace cleanups [DCCP] ccid3: Fixup some type conversions related to rtts [DCCP] ccid3: BUG-FIX - conversion errors [DCCP] ccid3: Reorder packet history source file [DCCP] ccid3: Reorder packet history header file [DCCP] ccid3: Make debug output consistent [DCCP] ccid3: Perform history operations only after packet has been sent [DCCP] ccid3: TX history - remove unused field [DCCP] ccid3: Shift window counter computation [DCCP] ccid3: Sanity-check RTT samples [DCCP] ccid3: Initialise RTT values [DCCP] ccid: Deprecate ccid_hc_tx_insert_options [DCCP]: Warn when discarding packet due to internal errors [DCCP]: Only deliver to the CCID rx side in charge [DCCP]: Simplify TFRC calculation [DCCP]: Debug timeval operations ...
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git://www.atmel.no/~hskinnemoen/linux/kernel/avr32Linus Torvalds authored
* 'for-linus' of git://www.atmel.no/~hskinnemoen/linux/kernel/avr32: [AVR32] Add missing #include <linux/param.h> to delay.c [AVR32] Pass dev parameter to dma_cache_sync() [AVR32] Implement intc_get_pending() [AVR32] Don't include <asm/delay.h> [AVR32] Put the chip in "stop" mode when halting the system [AVR32] Set flow handler for external interrupts [AVR32] Remove unused file [AVR32] Remove mii_phy_addr and eth_addr from eth_platform_data [AVR32] Move ethernet tag parsing to board-specific code [AVR32] Add macb1 platform_device [AVR32] Portmux API update
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git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpcLinus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (36 commits) [POWERPC] Generic BUG for powerpc [PPC] Fix compile failure do to introduction of PHY_POLL [POWERPC] Only export __mtdcr/__mfdcr if CONFIG_PPC_DCR is set [POWERPC] Remove old dcr.S [POWERPC] Fix SPU coredump code for max_fdset removal [POWERPC] Fix irq routing on some 32-bit PowerMacs [POWERPC] ps3: Add vuart support [POWERPC] Support ibm,dynamic-reconfiguration-memory nodes [POWERPC] dont allow pSeries_probe to succeed without initialising MMU [POWERPC] micro optimise pSeries_probe [POWERPC] Add SPURR SPR to sysfs [POWERPC] Add DSCR SPR to sysfs [POWERPC] Fix 440SPe CPU table entry [POWERPC] Add support for FP emulation for the e300c2 core [POWERPC] of_device_register: propagate device_create_file return code [POWERPC] Fix mmap of PCI resource with hack for X [POWERPC] iSeries: head_64.o needs to depend on lparmap.s [POWERPC] cbe_thermal: Fix initialization of sysfs attribute_group [POWERPC] Remove QE header files from lite5200.c [POWERPC] of_platform_make_bus_id(): make `magic' int ...
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Franck Bui-Huu authored
This patch makes paging_init() use highend_pfn/highstart_pfn globals. It removes the need of 'high' local which was needed only by HIGHMEM config. More important perhaps, it fixes a bug when HIGHMEM is set but there's actually no physical highmem (highend_pfn = 0) Signed-off-by:
Franck Bui-Huu <fbuihuu@gmail.com> Signed-off-by:
Ralf Baechle <ralf@linux-mips.org>
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Ralf Baechle authored
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Ralf Baechle authored
While the recent cset 86384d54 did improve things it didn't resolve all the problems. So bite the bullet and discard .exit.text and .exit.data at runtime. Which of course sucks because it bloats binaries with code that will never ever be used but it's the only thing that will work reliable as demonstrated by the function sd_major() in drivers/scsi/sd.c. Gcc may compile sd_major() using a jump table which it will put into .rodata. If it also inlines sd_major's function body into exit_sd() which gcc > 3.4.x does. If CONFIG_BLK_DEV_SD has been set to y we would like ld to discard exit_sd's code at link time. However sd_major happens to contain a switch statement which gcc will compile using a jump table in .rodata on the architectures I checked. So, when ld later discards .exit.text only the jump table in .rodata with its stale references to the discard .exit.text will be left which any no antique ld will honor with a link error. Signed-off-by:
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Ralf Baechle authored
Another way that old SGI types were getting dragged into generic code. Signed-off-by: -
Ralf Baechle authored
This also fixes the duplicate definition of nic_t in the s2io driver. Signed-off-by: -
Ralf Baechle authored
Nothing <asm/sn/arch.h> defines is used. Signed-off-by: -
Ralf Baechle authored
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Andrew Morton authored
During boot we get: netconsole: device eth0 not up yet, forcing it e1000: eth0: e1000_watchdog: NIC Link is Up 100 Mbps Full Duplex WARNING (!__warned) at kernel/softirq.c:137 local_bh_enable() Call Trace: [<ffffffff80235baf>] local_bh_enable+0x41/0xa3 [<ffffffff8045ab8e>] netpoll_send_skb+0x116/0x144 [<ffffffff8045b1ee>] netpoll_send_udp+0x263/0x271 [<ffffffff803d41ec>] write_msg+0x42/0x5e [<ffffffff80230c9b>] __call_console_drivers+0x5f/0x70 [<ffffffff80230d19>] _call_console_drivers+0x6d/0x71 [<ffffffff802313f0>] release_console_sem+0x148/0x1ec [<ffffffff802316ce>] register_console+0x1b1/0x1ba [<ffffffff803d4178>] init_netconsole+0x54/0x68 [<ffffffff802071ae>] init+0x152/0x308 [<ffffffff804dac8b>] _spin_unlock_irq+0x14/0x30 [<ffffffff8022c15e>] schedule_tail+0x43/0x9f [<ffffffff8020a758>] child_rip+0xa/0x12 Herbert sayeth: Normally networking isn't invoked with interrupts turned off, but I suppose we don't have a choice here. This is unique being a place where you can get called with BH on, off, or IRQs off. Given that this is only used for printk, the easiest solution is probably just to disable local IRQs instead of BH. Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 11 Dec, 2006 27 commits
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Simon Horman authored
Signed-off-by:
Simon Horman <horms@verge.net.au> Signed-off-by:
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Simon Horman authored
Dean Manners notices that when an IPVS synchonisation daemons are started the system load slowly climbs up to 1. This seems to be related to the call to ssleep(1) (aka msleep(1000) in the main loop. Replacing this with a call to msleep_interruptable() seems to make the problem go away. Though I'm not sure that it is correct. This is the second edition of this patch, which replaces ssleep() in the main loop for both the master and backup threads, as well as some thread synchronisation code. The latter is just for thorougness as it shouldn't be causing any problems. Signed-Off-By:
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Ralf Baechle authored
Fix foobar in 15b1c0e8 and e8cc49bb patch series. Signed-off-by:
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Arnaldo Carvalho de Melo authored
That accumulated over the last months hackaton, shame on me for not using git-apply whitespace helping hand, will do that from now on. Signed-off-by:Arnaldo Carvalho de Melo <acme@mandriva.com>
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Arnaldo Carvalho de Melo authored
Spotted by David Miller when compiling on sparc64, I reproduced it here on parisc64, that are the only platforms to define __kernel_suseconds_t as an 'int', all the others, x86_64 and x86 included typedef it as a 'long', but from the definition of suseconds_t it should just be an 'int' on platforms where it is >= 32bits, it would not require all the castings from suseconds_t to (int) when printking variables of this type, that are not needed on parisc64 and sparc64. Signed-off-by: -
Gerrit Renker authored
This fixes conversion errors which arose by not properly type-casting from u32 to __u64. Fixed by explicitly casting each type which is not __u64, or by performing operation after assignment. The patch further adds missing debug information to track the current value of X_recv. Signed-off-by:
Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by:
Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by:
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Gerrit Renker authored
No code change at all. This reorders the source file to follow the same order as the corresponding header file. Signed-off-by:
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Gerrit Renker authored
No code change at all. To make the header file easier to read, the following ordering is established among the declarations: * hist_new * hist_delete * hist_entry_new * hist_head * hist_find_entry * hist_add_entry * hist_entry_delete * hist_purge Signed-off-by:
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Gerrit Renker authored
This patch does not alter any algorithm, just the debug message format: * s#%s, sk=%p#%s(%p)#g * when a statename is present, it now uses %s(%p, state=%s) * when only function entry is debugged, it adds an `- entry' Signed-off-by:
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Gerrit Renker authored
This migrates all packet history operations into the routine ccid3_hc_tx_packet_sent, thereby removing synchronization problems that occur when, as before, the operations are spread over multiple routines. The following minor simplifications are also applied: * several simplifications now follow from this change - several tests are now no longer required * removal of one unnecessary variable (dp) Justification: Currently packet history operations span two different routines, one of which is likely to pass through several iterations of sleeping and awakening. The first routine, ccid3_hc_tx_send_packet, allocates an entry and sets a few fields. The remaining fields are filled in when the second routine (which is not within a sleeping context), ccid3_hc_tx_packet_sent, is called. This has several strong drawbacks: * it is not necessary to split history operations - all fields can be filled in by the second routine * the first routine is called multiple times, until a packet can be sent, and sleeps meanwhile - this causes a lot of difficulties with regard to keeping the list consistent * since both routines do not have a producer-consumer like synchronization, it is very difficult to maintain data across calls to these routines * the fact that the routines are called in different contexts (sleeping, not sleeping) adds further problems Signed-off-by: -
Gerrit Renker authored
This removes the `dccphtx_ccval' field since it is nowhere used in the code and in fact not necessary for the accounting. Signed-off-by:
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Gerrit Renker authored
This puts the window counter computation [RFC 4342, 8.1] into a separate function which is called whenever a new packet is ready for immediate transmission in ccid3_hc_tx_send_packet. Justification: The window counter update was previously computed after the packet was sent. This has two drawbacks, both fixed by this patch: 1) re-compute another timestamp almost directly after the packet was sent (expensive), 2) the CCVal for the window counter is needed at the instant the packet is sent. Further details: The initialisation of the window counter is left in the state NO_SENT, as before. The algorithm will do nothing if either RTT is initialised to 0 (which is ok) or if the RTT value remains below 4 microseconds (which is almost pathological). Signed-off-by:
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Gerrit Renker authored
CCID3 performance depends much on the accuracy of RTT samples. If RTT samples grow too large, performance can be catastrophically poor. To limit the amount of possible damage in such cases, the patch * introduces an upper limit which identifies a maximum `sane' RTT value; * uses a macro to enforce this upper limit. Using a macro was given preference, since it is necessary to identify the calling function in the warning message. Since exceeding this threshold identifies a critical condition, DCCP_CRIT is used and not DCCP_WARN. Many thanks to Ian McDonald for collaboration on this issue. Signed-off-by:
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Gerrit Renker authored
In both the sender and the receiver it is possible that the stored RTT value is accessed before an actual RTT estimate has been computed. This patch * initialises the sender RTT to 0 - the sender always accesses the RTT in ccid3_hc_tx_packet_sent - the RTT is further needed for the window counter algorithm * replaces the receiver initialisation of 5msec with 0 - which has the same effect and removes an `XXX' - the RTT value is needed in ccid3_hc_rx_packet_recv as rtt_prev Signed-off-by: -
Gerrit Renker authored
The function ccid3_hc_tx_insert_options only does a redundant no-op, as the operation DCCP_SKB_CB(skb)->dccpd_ccval = hctx->ccid3hctx_last_win_count; is already performed _unconditionally_ in ccid3_hc_tx_send_packet. Since there is further no current need for this function, it is removed entirely. Since furthermore, there is actually no present need for the entire interface function ccid_hc_tx_insert_options, it was decided to remove it also, to clean up the interface. Signed-off-by:
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Gerrit Renker authored
This adds a (debug) warning message which is triggered whenever a packet is discarded due to send failure. It also adds a conditional, so that an interruption during dccp_wait_for_ccid is not treated as a `BUG': the rationale is that interruptions are external, whereas bug warnings are concerned with the internals. Signed-off-by:
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Gerrit Renker authored
This is an optimisation to reduce CPU load. The received feedback is now only directed to the active CCID component, without requiring processing also by the inactive one. As a consequence, a similar test in ccid3.c is now redundant and is also removed. Justification: Currently DCCP works as a unidirectional service, i.e. a listening server is not at the same time a connecting client. As far as I can see, several modifications are necessary until that becomes possible. At the present time, received feedback is both fed to the rx/tx CCID modules. In unidirectional service, only one of these is active at any one time. Signed-off-by:
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Gerrit Renker authored
In migrating towards using the newer functions scaled_div/scaled_div32 for TFRC computations mapped from floating-point onto integer arithmetic, this completes the last stage of modifications. In particular, the overflow case for computing X_calc is circumvented by * breaking the computation into two stages * the first stage, res = (s*1E6)/R, cannot overflow due to use of u64 * in the second stage, res = (res*1E6)/f, overflow on u32 is avoided due to (i) returning UINT_MAX in this case (which is logically appropriate) and (ii) issuing a warning message into the system log (since very likely there is a problem somewhere else with the parameters) Lastly, all such scaling operations are now exported into tfrc.h, since actually this form of scaled computation is specific to TFRC and not to CCID3. Signed-off-by:
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Gerrit Renker authored
Problem: Most target types in the CCID3 code are u32, so subtle conversion errors can occur if signed time calculations yield negative results: the original values are lost in the conversion to unsigned, calculation errors go undetected. This patch therefore * sets all critical time types from unsigned to suseconds_t * avoids comparison between signed/unsigned via type-casting * provides ample warning messages in case time calculations are negative These warning messages can be removed at a later stage when the code has undergone more testing. Signed-off-by:
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Gerrit Renker authored
This simplifies the calculation of a value p for a given fval when the first loss interval is computed (RFC 3448, 6.3.1). It makes use of the two new functions scaled_div/scaled_div32 to provide overflow protection. Additionally, protection against divide-by-zero is extended - in this case the function will return the maximally possible value of p=100%. Background: The maximum fval, f(100%), is approximately 244, i.e. the scaled value of fval should never exceed 244E6, which fits easily into u32. The problem is the scaling by 10^6, since additionally R(TT) is in microseconds. This is resolved by breaking the division into two stages: the first stage computes fval=(s*10^6)/R, stores that into u64; the second stage computes fval = (fval*10^6)/X_recv and complains if overflow is reached for u32. This case is safe since the TFRC reverse-lookup routine then returns p=100%. Signed-off-by:
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Gerrit Renker authored
This replaces the remaining uses of usecs_div with scaled_div32, which internally uses 64bit division and produces a warning on overflow. Signed-off-by:
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Gerrit Renker authored
This patch * resolves a bug where packets smaller than 32/64 bytes resulted in sending rates of 0 * supports all sending rates from 1/64 bytes/second up to 4Gbyte/second * simplifies the present overflow problems in calculations Current sending rate X and the cached value X_recv of the receiver-estimated sending rate are both scaled by 64 (2^6) in order to * cope with low sending rates (minimally 1 byte/second) * allow upgrading to use a packets-per-second implementation of CCID 3 * avoid calculation errors due to integer arithmetic cut-off The patch implements a revised strategy from http://www.mail-archive.com/dccp@vger.kernel.org/msg01040.html The only difference with regard to that strategy is that t_ipi is already used in the calculation of the nofeedback timeout, which saves one division. Signed-off-by:
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Gerrit Renker authored
This fixes 1) a bug in the recomputation of the sending rate by the nofeedback timer when no feedback at all has so far been sent by the receiver: min_t was used instead of max_t, which is wrong (cf. RFC 3448, p. 10); 2) an error in the computation of larger initial windows: instead of min(... max()) (cf. RFC 4342, 5.), the code had used max(... max()). Signed-off-by: -
Gerrit Renker authored
This performs two optimisations for the recomputation of the sending rate. 1) Currently the target sending rate X_calc is recalculated whenever a) the nofeedback timer expires, or b) a feedback packet is received. In the (a) case, recomputing X_calc is redundant, since * the parameters p and RTT do not change in between the reception of feedback packets; * the parameter X_recv is either modified from received feedback or via the nofeedback timer; * a test (`p == 0') in the nofeedback timer avoids using a stale/undefined value of X_calc if p was previously 0. 2) The nofeedback timer now only recomputes a timestamp when p == 0. This is according to step (4) of [RFC 3448, 4.3] and avoids unnecessarily determining a timestamp. A debug statement about not updating X is also removed - it helps very little in debugging and just clutters the logs. Signed-off-by: -
Gerrit Renker authored
This patch follows a suggestion by Ian McDonald and ensures that in the current code the value of p can not exceed 100%. Such a value is illegal and would consequently cause a bug condition in tfrc_calc_x(). The receiver case is also tested, and a warning message is added. Signed-off-by:
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Ian McDonald authored
As Eddie Kohler points out the RFC is Proposed Standard not experimental. Also removed documentation about deprecated socket option. Signed-off-by:
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Ian McDonald authored
It simplifies waiting for the CCID module to signal that a packet is ready to be sent. Other simplifications flow on from this such as removing constants. As a result of this EAGAIN is not returned any more by dccp_wait_for_ccid (which would otherwise lead to unnecessarily discarding the packet in dccp_write_xmit). Signed-off-by:
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