- 05 Aug, 2011 2 commits
-
-
Vivek Goyal authored
There are always questions about why CFQ is idling on various conditions. Recent ones is Christoph asking again why to idle on REQ_NOIDLE. His assertion is that XFS is relying more and more on workqueues and is concerned that CFQ idling on IO from every workqueue will impact XFS badly. So he suggested that I add some more documentation about CFQ idling and that can provide more clarity on the topic and also gives an opprotunity to poke a hole in theory and lead to improvements. So here is my attempt at that. Any comments are welcome. Signed-off-by:
Vivek Goyal <vgoyal@redhat.com> Signed-off-by:
Jens Axboe <jaxboe@fusionio.com>
-
Tao Ma authored
Commit 5757a6d7 introduced a new rq_affinity = 2 so as to make the request completed in the __make_request cpu. But it makes the old rq_affinity = 1 not work any more. The root cause is that if the 'cpu' and 'req->cpu' is in the same group and cpu != req->cpu, ccpu will be the same as group_cpu, so the completion will be excuted in the 'cpu' not 'group_cpu'. This patch fix problem by simpling removing group_cpu and the codes are more explicit now. If ccpu == cpu, we complete in cpu, otherwise we raise_blk_irq to ccpu. Cc: Christoph Hellwig <hch@infradead.org> Cc: Roland Dreier <roland@purestorage.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Jens Axboe <jaxboe@fusionio.com> Signed-off-by:
Tao Ma <boyu.mt@taobao.com> Reviewed-by:
Shaohua Li <shaohua.li@intel.com> Signed-off-by:
-
- 03 Aug, 2011 1 commit
-
-
Axel Lin authored
of_device_id structures need a NULL terminating entry, add it. Signed-off-by:
Axel Lin <axel.lin@gmail.com> Signed-off-by:
-
- 02 Aug, 2011 5 commits
-
-
Herbert Poetzl authored
Remove the (unsigned long long) cast in diskstats_show() and adjusts the seq_printf() format string to 'unsigned long' diskstats_show() uses part_stat_read() to get the stats, which either accesses the specified field in the struct disk_stats directly (non SMP) or sums up the per CPU values in a variable of the same type as the field, so in any case the result will have the same type and range as the specified field which for all disk_stats entries is unsigned long Also, for unsigned long ranges the output of %lu should be identical to the one of %llu, so no change in the actual proc entry contents. Signed-off-by:
Herbert Poetzl <herbert@13thfloor.at> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
-
Andrew Morton authored
The report has an ISO which has a very long manufacturer ID. It seems that Linux is wrong, not the ISO maker. Relax the check for the length of this field: emit a warning and truncate the incoming data to 2048 bytes rather than rejecting the entire thing. dvd_manufact.value isn't null-terminated. I'm not even sure if it's a string. The kernel doesn't apepar to use it anyway. Addresses https://bugzilla.kernel.org/show_bug.cgi?id=39062 Reported-by: <ale.goujon@gmail.com> Tested-by: <ale.goujon@gmail.com> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by:
-
H Hartley Sweeten authored
The buffer 'sc.cpu_mask' is a kernel buffer. If bitmap_parse is used instead of __bitmap_parse the extra parameter that indicates a kernel buffer is not needed. Signed-off-by:
H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Lars Ellenberg <drbd-dev@lists.linbit.com> Cc: Philipp Reisner <philipp.reisner@linbit.com> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by:
-
Jens Axboe authored
Due to conflicts with the moduleh tree in linux-next, we run into an include file mess. We really need export.h in that tree, but if we add module.h locally then the issue is easier to resolve. Reported-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
-
Vivek Goyal authored
FQ keeps track of number of groups which are linked on blkcg->blkg_list. This is useful to avoid races between queue exit and cgroup exit code paths. So if at the request queue exit time linked group count is not zero, that means there are some group out there which is yet to be deleted under rcu read period and queue exit code should wait for on rcu period. In my previous patch I forgot to decrease the number of group count. So in current form, we nr_blkcg_linked_grps is always non-zero and we will always wait one rcu period (if BLK_CGROUP=y). The side effect of this is that it can increase boot time. I am surprised, nobody complained so far. Signed-off-by:
-
- 01 Aug, 2011 1 commit
-
-
Shaohua Li authored
read request is always sync. Using rw_is_sync() to determine if a bio is sync. Signed-off-by:
-
- 31 Jul, 2011 31 commits
-
-
Kay Sievers authored
LOOP_CLR_FD takes lo->lo_ctl_mutex and tries to remove the loop sysfs files. Sysfs calls show() and waits for lo->lo_ctl_mutex. LOOP_CLR_FD waits for show() to finish to remove the sysfs file. cat /sys/class/block/loop0/loop/backing_file mutex_lock_nested+0x176/0x350 ? loop_attr_do_show_backing_file+0x2f/0xd0 [loop] ? loop_attr_do_show_backing_file+0x2f/0xd0 [loop] loop_attr_do_show_backing_file+0x2f/0xd0 [loop] dev_attr_show+0x1b/0x60 ? sysfs_read_file+0x86/0x1a0 ? __get_free_pages+0x12/0x50 sysfs_read_file+0xaf/0x1a0 ioctl(LOOP_CLR_FD): wait_for_common+0x12c/0x180 ? try_to_wake_up+0x2a0/0x2a0 wait_for_completion+0x18/0x20 sysfs_deactivate+0x178/0x180 ? sysfs_addrm_finish+0x43/0x70 ? sysfs_addrm_start+0x1d/0x20 sysfs_addrm_finish+0x43/0x70 sysfs_hash_and_remove+0x85/0xa0 sysfs_remove_group+0x59/0x100 loop_clr_fd+0x1dc/0x3f0 [loop] lo_ioctl+0x223/0x7a0 [loop] Instead of taking the lo_ctl_mutex from sysfs code, take the inner lo->lo_lock, to protect the access to the backing_file data. Thanks to Tejun for help debugging and finding a solution. Cc: Milan Broz <mbroz@redhat.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by:Kay Sievers <kay.sievers@vrfy.org> Cc: stable@kernel.org Signed-off-by:
-
Kay Sievers authored
Instead of unconditionally creating a fixed number of dead loop devices which need to be investigated by storage handling services, even when they are never used, we allow distros start with 0 loop devices and have losetup(8) and similar switch to the dynamic /dev/loop-control interface instead of searching /dev/loop%i for free devices. Signed-off-by:
-
Kay Sievers authored
Loop devices today have a fixed pre-allocated number of usually 8. The number can only be changed at module init time. To find a free device to use, /dev/loop%i needs to be scanned, and all devices need to be opened until a free one is possibly found. This adds a new /dev/loop-control device node, that allows to dynamically find or allocate a free device, and to add and remove loop devices from the running system: LOOP_CTL_ADD adds a specific device. Arg is the number of the device. It returns the device i or a negative error code. LOOP_CTL_REMOVE removes a specific device, Arg is the number the device. It returns the device i or a negative error code. LOOP_CTL_GET_FREE finds the next unbound device or allocates a new one. No arg is given. It returns the device i or a negative error code. The loop kernel module gets automatically loaded when /dev/loop-control is accessed the first time. The alias specified in the module, instructs udev to create this 'dead' device node, even when the module is not loaded. Example: cfd = open("/dev/loop-control", O_RDWR); # add a new specific loop device err = ioctl(cfd, LOOP_CTL_ADD, devnr); # remove a specific loop device err = ioctl(cfd, LOOP_CTL_REMOVE, devnr); # find or allocate a free loop device to use devnr = ioctl(cfd, LOOP_CTL_GET_FREE); sprintf(loopname, "/dev/loop%i", devnr); ffd = open("backing-file", O_RDWR); lfd = open(loopname, O_RDWR); err = ioctl(lfd, LOOP_SET_FD, ffd); Cc: Tejun Heo <tj@kernel.org> Cc: Karel Zak <kzak@redhat.com> Signed-off-by: -
Kay Sievers authored
Replace the linked list, that keeps track of allocated devices, with an idr index to allow a more efficient lookup of devices. Cc: Tejun Heo <tj@kernel.org> Signed-off-by:
-
Mike Christie authored
This moves the FC classes bsg code to the block layer and makes it a lib so that other classes like iscsi and SAS can use it. It is helpful because working with the request queue, bios, creating scatterlists, etc are a pain that the LLD does not have to worry about with normal IOs and should not have to worry about for bsg requests. Signed-off-by:
Mike Christie <michaelc@cs.wisc.edu> Signed-off-by:
-
git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds authored
* 'nfs-for-3.1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (28 commits) pnfsblock: write_pagelist handle zero invalid extents pnfsblock: note written INVAL areas for layoutcommit pnfsblock: bl_write_pagelist pnfsblock: bl_read_pagelist pnfsblock: cleanup_layoutcommit pnfsblock: encode_layoutcommit pnfsblock: merge rw extents pnfsblock: add extent manipulation functions pnfsblock: bl_find_get_extent pnfsblock: xdr decode pnfs_block_layout4 pnfsblock: call and parse getdevicelist pnfsblock: merge extents pnfsblock: lseg alloc and free pnfsblock: remove device operations pnfsblock: add device operations pnfsblock: basic extent code pnfsblock: use pageio_ops api pnfsblock: add blocklayout Kconfig option, Makefile, and stubs pnfs: cleanup_layoutcommit pnfs: ask for layout_blksize and save it in nfs_server ...
-
git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6Linus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6: slab: use NUMA_NO_NODE slab: remove one NR_CPUS dependency
-
git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writebackLinus Torvalds authored
* 'urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback: don't busy retry the inode on failed grab_super_passive()
-
git://git.infradead.org/battery-2.6Linus Torvalds authored
* git://git.infradead.org/battery-2.6: gpio-charger: Fix checking return value of request_any_context_irq power_supply: MAX17042: Support additional properties max8903_charger: Allow platform data to be __initdata power_supply: Add charger driver for MAX8998/LP3974 power_supply: Add charger driver for MAX8997/8966 max17042_battery: Remove obsolete cleanup for clientdata twl4030_charger: Fix warnings wm831x_power: Support multiple instances wm831x_backup: Support multiple instances apm_power: Fix style error in macros s3c_adc_battery: Fix annotation for s3c_adc_battery_probe() bq20z75: Enable detection after registering bq20z75: Add support for external notification
-
git://git.kernel.org/pub/scm/linux/kernel/git/brodo/cpupowerutilsLinus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/brodo/cpupowerutils: cpupower: Do detect IDA (opportunistic processor performance) via cpuid cpupower: Show Intel turbo ratio support via ./cpupower frequency-info cpupowerutils: increase MAX_LINE_LEN cpupower: Rename package from cpupowerutils to cpupower cpupowerutils: Rename: libcpufreq->libcpupower cpupowerutils: use kernel version-derived version string cpupowerutils: utils - ConfigStyle bugfixes cpupowerutils: helpers - ConfigStyle bugfixes cpupowerutils: idle_monitor - ConfigStyle bugfixes cpupowerutils: lib - ConfigStyle bugfixes cpupowerutils: bench - ConfigStyle bugfixes cpupowerutils: do not update po files on each and every compile cpupowerutils: remove ccdv, use kernel quiet/verbose mechanism cpupowerutils: use COPYING, CREDITS from top-level directory cpupowerutils - cpufrequtils extended with quite some features
-
git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6: smc91c92_cs.c: fix bogus compiler warning orinoco_cs: be more careful when matching cards with ID 0x0156:0x0002 hostap_cs: support cards with "Version 01.02" as third product ID pcmcia: add PCMCIA_DEVICE_MANF_CARD_PROD_ID3 pxa2xx pcmcia - stargate 2 use gpio array. pcmcia: pxa2xx: remove empty socket_init / socket_resume functions. drivers:pcmcia:soc_common: make socket_init and socket_suspend optional
-
Peng Tao authored
For invalid extents, find other pages in the same fsblock and write them out. [pnfsblock: write_begin] Signed-off-by:
Fred Isaman <iisaman@citi.umich.edu> Signed-off-by:
Benny Halevy <bhalevy@panasas.com> Signed-off-by:
Benny Halevy <bhalevy@tonian.com> Signed-off-by:
Peng Tao <peng_tao@emc.com> Signed-off-by:
Jim Rees <rees@umich.edu> Signed-off-by:
Trond Myklebust <Trond.Myklebust@netapp.com>
-
Fred Isaman authored
Signed-off-by:
-
Fred Isaman authored
Note: When upper layer's read/write request cannot be fulfilled, the block layout driver shouldn't silently mark the page as error. It should do what can be done and leave the rest to the upper layer. To do so, we should set rdata/wdata->res.count properly. When upper layer re-send the read/write request to finish the rest part of the request, pgbase is the position where we should start at. [pnfsblock: bl_write_pagelist support functions] [pnfsblock: bl_write_pagelist adjust for missing PG_USE_PNFS] Signed-off-by:
Zhang Jingwang <yyalone@gmail.com> [pnfs-block: use new write_pagelist api] Signed-off-by:
Boaz Harrosh <bharrosh@panasas.com> Signed-off-by:
-
Fred Isaman authored
Note: When upper layer's read/write request cannot be fulfilled, the block layout driver shouldn't silently mark the page as error. It should do what can be done and leave the rest to the upper layer. To do so, we should set rdata/wdata->res.count properly. When upper layer re-send the read/write request to finish the rest part of the request, pgbase is the position where we should start at. [pnfsblock: mark IO error with NFS_LAYOUT_{RW|RO}_FAILED] Signed-off-by: -
Fred Isaman authored
In blocklayout driver. There are two things happening while layoutcommit/cleanup. 1. the modified extents are encoded. 2. On cleanup the extents are put back on the layout rw extents list, for reads. In the new system where actual xdr encoding is done in encode_layoutcommit() directly into xdr buffer, these are the new commit stages: 1. On setup_layoutcommit, the range is adjusted as before and a structure is allocated for communication with bl_encode_layoutcommit && bl_cleanup_layoutcommit (Generic layer provides a void-star to hang it on) 2. bl_encode_layoutcommit is called to do the actual encoding directly into xdr. The commit-extent-list is not freed and is stored on above structure. FIXME: The code is not yet converted to the new XDR cleanup 3. On cleanup the commit-extent-list is put back by a call to set_to_rw() as before, but with no need for XDR decoding of the list as before. And the commit-extent-list is freed. Finally allocated structure is freed. [rm inode and pnfs_layout_hdr args from cleanup_layoutcommit()] Signed-off-by:
Tao Guo <guotao@nrchpc.ac.cn> [pnfsblock: cleanup_layoutcommit wants a status parameter] Signed-off-by:
-
Fred Isaman authored
In blocklayout driver. There are two things happening while layoutcommit/cleanup. 1. the modified extents are encoded. 2. On cleanup the extents are put back on the layout rw extents list, for reads. In the new system where actual xdr encoding is done in encode_layoutcommit() directly into xdr buffer, these are the new commit stages: 1. On setup_layoutcommit, the range is adjusted as before and a structure is allocated for communication with bl_encode_layoutcommit && bl_cleanup_layoutcommit (Generic layer provides a void-star to hang it on) 2. bl_encode_layoutcommit is called to do the actual encoding directly into xdr. The commit-extent-list is not freed and is stored on above structure. FIXME: The code is not yet converted to the new XDR cleanup 3. On cleanup the commit-extent-list is put back by a call to set_to_rw() as before, but with no need for XDR decoding of the list as before. And the commit-extent-list is freed. Finally allocated structure is freed. [rm inode and pnfs_layout_hdr args from cleanup_layoutcommit()] [pnfsblock: get rid of deprecated xdr macros] Signed-off-by:
-
Fred Isaman authored
Signed-off-by:
-
Fred Isaman authored
Adds working implementations of various support functions to handle INVAL extents, needed by writes, such as bl_mark_sectors_init and bl_is_sector_init. [pnfsblock: fix 64-bit compiler warnings for extent manipulation] Signed-off-by:
Zhang Jingwang <zhangjingwang@nrchpc.ac.cn> Signed-off-by:
-
Fred Isaman authored
Implement bl_find_get_extent(), one of the core extent manipulation routines. [pnfsblock: Lookup list entry of layouts and tags in reverse order] Signed-off-by:
-
Fred Isaman authored
XDR decodes the block layout payload sent in LAYOUTGET result, storing the result in an extent list. [pnfsblock: get rid of deprecated xdr macros] Signed-off-by:
-
Fred Isaman authored
Call GETDEVICELIST during mount, then call and parse GETDEVICEINFO for each device returned. [pnfsblock: get rid of deprecated xdr macros] Signed-off-by:
-
Fred Isaman authored
Replace a stub, so that extents underlying the layouts are properly added, merged, or ignored as necessary. Signed-off-by:
Mingyang Guo <guomingyang@nrchpc.ac.cn> Signed-off-by:
-
Fred Isaman authored
Signed-off-by:
Zhang Jingwang <Jingwang.Zhang@emc.com> Signed-off-by:
-
Jim Rees authored
Signed-off-by:
-
Jim Rees authored
Signed-off-by:
-
Fred Isaman authored
Adds structures and basic create/delete code for extents. Signed-off-by:
-
Benny Halevy authored
[pnfsblock: use pnfs_generic_pg_init_read/write] Signed-off-by:
-
Fred Isaman authored
Define a configuration variable to enable/disable compilation of the block driver code. Add the minimal structure for a pnfs block layout driver, and empty list-heads that will hold the extent data [pnfsblock: make NFS_V4_1 select PNFS_BLOCK] Signed-off-by:
-
Andy Adamson authored
This gives layout driver a chance to cleanup structures they put in at encode_layoutcommit. Signed-off-by:
Andy Adamson <andros@netapp.com> [fixup layout header pointer for layoutcommit] Signed-off-by:
-
Fred Isaman authored
Block layout needs it to determine IO size. Signed-off-by:
Tao Guo <glorioustao@gmail.com> Signed-off-by:
-
