- 18 Apr, 2005 4 commits
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David S. Miller authored
We were flushing the D-cache excessively for ptrace() processing and this makes debugging threads so slow as to be totally unusable. All process page accesses via ptrace() go via access_process_vm(). This routine, for each process page, uses get_user_pages(). That in turn does a flush_dcache_page() on the child pages before we copy in/out the ptrace request data. Therefore, all we need to do after the data movement is: 1) Flush the D-cache pages if the kernel maps the page to a different color than userspace does. 2) If we wrote to the page, we need to flush the I-cache on older cpus. Previously we just flushed the entire cache at the end of a ptrace() request, and that was beyond stupid. Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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David S. Miller authored
SunOS aparently had this weird PTRACE_CONT semantic which we copied. If the addr argument is something other than 1, it sets the process program counter to whatever that value is. This is different from every other Linux architecture, which don't do anything with the addr and data args. This difference in particular breaks the Linux native GDB support for fork and vfork tracing on sparc and sparc64. There is no interest in running SunOS binaries using this weird PTRACE_CONT behavior, so just delete it so we behave like other platforms do. Signed-off-by:
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David S. Miller authored
A couple message queue system call entries for compat tasks were not using the necessary compat_sys_*() functions, causing some glibc test cases to fail. Signed-off-by:
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David S. Miller authored
This case actually can get exercised a lot during an ELF coredump of a process which contains a lot of non-COW'd anonymous pages. GDB has this test case which in partiaular creates near terabyte process full of ZERO_PAGEes. It takes forever to just walk through the page tables because of all of these spurious cache flushes on sparc64. With this change it takes only a second or so. Signed-off-by:
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- 17 Apr, 2005 8 commits
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Linus Torvalds authored
First ever true git merge. Let's see if it actually works.
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Linus Torvalds authored
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David Brownell authored
This reverts a fs/char_dev.c patch that was merged into BK on March 3. The problem is that it breaks things ... __register_chrdev_region() has a block of code, commented "temporary" for over two years now, which fails rudely during PCMCIA initialization or other register_chrdev() calls, because it doesn't "degrade to linked list". This keeps whole subsystems from working. A real fix to that "temporary" code should be possible, using some better scheme to allocate major numbers, but it's not something I want to spend time on just now. Signed-off-by:
David Brownell <dbrownell@users.sourceforge.net> Acked-by:
Matt Mackall <mpm@selenic.com> Signed-off-by:
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Russell King authored
Fix debug EBSA285 and RiscPC debugging macros to detect whether the MMU is enabled. Signed-off-by:Russell King <rmk@arm.linux.org.uk>
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Russell King authored
Convert ARM bitop assembly to a macro. All bitops follow the same format, so it's silly duplicating the code when only one or two instructions are different. Signed-off-by: -
Russell King authored
Fix show_regs() to provide a backtrace. Provide a new __show_regs() function which implements the common subset of show_regs() and die(). Add prototypes to asm-arm/system.h Signed-off-by: -
Russell King authored
h3600_irda_set_speed() had the wrong type for the "speed" argument. Fix this. Signed-off-by: -
Russell King authored
The footbridge ISA RTC was being initialised before we had setup the kernel timer. This caused a divide by zero error when the current time of day is set. Resolve this by initialising the RTC after the kernel timer has been initialised. Signed-off-by:
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- 16 Apr, 2005 28 commits
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NeilBrown authored
The conditions that cause these calls to MD_BUG are not kernel bugs, just oddities in what userspace is asking for. Also convert analyze_sbs to return void, and the value it returned was always 0. Signed-off-by:
Neil Brown <neilb@cse.unsw.edu.au> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
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NeilBrown authored
There is a tiny race when de-registering an MD thread, in that the thread could disappear before it is set a SIGKILL, causing send_sig to have problems. This is most easily closed by holding tasklist_lock between enabling the thread to exit (setting ->run to NULL) and telling it to exit. (akpm: ick. Needs to use kthread API and stop using signals) Signed-off-by:
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Benjamin Herrenschmidt authored
This patch does the long overdue updates to MAINTAINERS file for aty128fb and radeonfb. Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Russell King authored
Fix the formatting of some comments in 8250.c, and add a note that the register_serial / unregister_serial shouldn't be used in new code. We do this here in preference to adding to linux/serial.h, since that is used by a number of non-8250 drivers which pretend to be 8250. It is not known whether it would be appropriate to do so. Signed-off-by:
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NeilBrown authored
We were failing to close on an error path, resulting in a leak of struct files which could take a v4 server down fairly quickly.... So call nfs4_close_delegation instead of just open-coding parts of it. Simplify the cleanup on delegation failure while we're at it. Signed-off-by:
J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by:
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NeilBrown authored
rpc_create_clnt and friends return errors, not NULL, on failure. Signed-off-by:
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NeilBrown authored
Fixes the error "RPC: failed to contact portmap (errno -512)." when the server later tries to unregister from the portmapper. Signed-off-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by:
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akpm@osdl.org authored
This fixes the lots-of-fsx-linux-instances-cause-a-slow-leak bug. It's been there since 2.6.6, caused by: ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.5/2.6.5-mm4/broken-out/jbd-move-locked-buffers.patch That patch moves under-writeout ordered-data buffers onto a separate journal list during commit. It took out the old code which was based on a single list. The old code (necessarily) had logic which would restart I/O against buffers which had been redirtied while they were on the committing transaction's t_sync_datalist list. The new code only writes buffers once, ignoring redirtyings by a later transaction, which is good. But over on the truncate side of things, in journal_unmap_buffer(), we're treating buffers on the t_locked_list as inviolable things which belong to the committing transaction, and we just leave them alone during concurrent truncate-vs-commit. The net effect is that when truncate tries to invalidate a page whose buffers are on t_locked_list and have been redirtied, journal_unmap_buffer() just leaves those buffers alone. truncate will remove the page from its mapping and we end up with an anonymous clean page with dirty buffers, which is an illegal state for a page. The JBD commit will not clean those buffers as they are removed from t_locked_list. The VM (try_to_free_buffers) cannot reclaim these pages. The patch teaches journal_unmap_buffer() about buffers which are on the committing transaction's t_locked_list. These buffers have been written and I/O has completed. We can take them off the transaction and undirty them within the context of journal_invalidatepage()->journal_unmap_buffer(). Acked-by:
"Stephen C. Tweedie" <sct@redhat.com> Signed-off-by:
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Roland Dreier authored
Correct unwinding in error path of mthca_init_icm(). Signed-off-by:
Roland Dreier <roland@topspin.com> Signed-off-by:
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Roland Dreier authored
Decouple table of HCA features from exact HCA device type. Add a current FW version field so we can warn when someone is using old FW. Add support for new MT25204 HCA. Remove the warning about mem-free support, since it should be pretty solid at this point. Signed-off-by:
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Roland Dreier authored
Fix RDMA in mem-free mode: we need to make sure that the RDMA context memory is mapped for the HCA. Signed-off-by:
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Roland Dreier authored
Update initialization of receive queue to match new documentation. This change is required to support new MT25204 HCA. Signed-off-by:
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Roland Dreier authored
Clean up mem-free mode support by introducing mthca_is_memfree() function, which encapsulates the logic of deciding if a device is mem-free. Signed-off-by:
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Roland Dreier authored
Minor tweaks to firmware command handling: kill off an unused get of a value, and add a little more info to debug output. Signed-off-by:
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Michael S. Tsirkin authored
Implement fast memory regions (FMRs), where the driver writes directly into the HCA's translation tables rather than requiring a firmware command. For Tavor, MTTs for FMR are separate from regular MTTs, and are reserved at driver initialization. This is done to limit the amount of virtual memory needed to map the MTTs. For Arbel, there's no such limitation, and all MTTs and MPTs may be used for FMR or for regular MR. Signed-off-by:
Michael S. Tsirkin <mst@mellanox.co.il> Signed-off-by:
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Michael S. Tsirkin authored
Split Tavor and Arbel/mem-free index<->hw key munging routines, so that FMR implementation can call correct implementation without testing HCA type (which it already knows). Signed-off-by:
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Michael S. Tsirkin authored
Add mthca_table_find() function, which returns the lowmem address of an entry in a mem-free HCA's context tables. This will be used by the FMR implementation. Signed-off-by:
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Michael S. Tsirkin authored
Add code for SYNC_TPT firmware command, which will be used by FMR implementation. Signed-off-by:
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Michael S. Tsirkin authored
Add mthca_write64_raw() function, which will be used to write FMR entries that are in ioremapped PCI memory. Signed-off-by:
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Michael S. Tsirkin authored
Encapsulate the buddy allocator used for MTT segments. This cleans up the code and also gets us ready to add FMR support. Signed-off-by:
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Roland Dreier authored
Make address handle verbs usable from interrupt context. Signed-off-by:
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Michael S. Tsirkin authored
Fill in missing fields in send completions. Signed-off-by:
Itamar Rabenstein <itamar@mellanox.co.il> Signed-off-by:
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Roland Dreier authored
Fix bug in MTT allocation in mem-free mode. I misunderstood the MTT size value returned by the firmware -- it is really the size of a single MTT entry, since mem-free mode does not segment the MTT as the original firmware did. This meant that our MTT addresses ended up being off by a factor of 8. This meant that our MTT allocations might overlap, and so we could overwrite and corrupt earlier memory regions when writing new MTT entries. We fix this by always using our 64-byte MTT segment size. This allows some simplification of the code as well, since there's no reason to put the MTT segment size in a variable -- we can always use our enum value directly. Signed-off-by:
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Roland Dreier authored
Add code to support RDMA and atomic send work requests in mem-free mode. Signed-off-by:
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Roland Dreier authored
CQ numbers are only 24 bits, so only print 6 hex digits and mask off reserved part when reporting a CQ event. Signed-off-by:
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Roland Dreier authored
On error path, only free doorbell records if we're in mem-free mode. Signed-off-by:
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Roland Dreier authored
Print IRQ number when NOP command interrupt test fails to help debugging. Signed-off-by:
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Roland Dreier authored
Release mutex on error return path from mthca_alloc_db(). Signed-off-by:
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