- 20 Oct, 2006 40 commits
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Dmitriy Monakhov authored
--=-=-= from mm/memory.c: 1434 static inline void cow_user_page(struct page *dst, struct page *src, unsigned long va) 1435 { 1436 /* 1437 * If the source page was a PFN mapping, we don't have 1438 * a "struct page" for it. We do a best-effort copy by 1439 * just copying from the original user address. If that 1440 * fails, we just zero-fill it. Live with it. 1441 */ 1442 if (unlikely(!src)) { 1443 void *kaddr = kmap_atomic(dst, KM_USER0); 1444 void __user *uaddr = (void __user *)(va & PAGE_MASK); 1445 1446 /* 1447 * This really shouldn't fail, because the page is there 1448 * in the page tables. But it might just be unreadable, 1449 * in which case we just give up and fill the result with 1450 * zeroes. 1451 */ 1452 if (__copy_from_user_inatomic(kaddr, uaddr, PAGE_SIZE)) 1453 memset(kaddr, 0, PAGE_SIZE); 1454 kunmap_atomic(kaddr, KM_USER0); #### D-cache have to be flushed here. #### It seems it is just forgotten. 1455 return; 1456 1457 } 1458 copy_user_highpage(dst, src, va); #### Ok here. flush_dcache_page() called from this func if arch need it 1459 } Following is the patch fix this issue: Signed-off-by:Dmitriy Monakhov <dmonakhov@openvz.org> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Satoru Takeuchi authored
Fixing cpu-hotplug documentation as follows: - moving confusing asterisk on additional_cpus descrition - fixing some typos - unifying indentation for source code and command line example Signed-off-by:
Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com> Cc: Ashok Raj <ashok.raj@intel.com> Signed-off-by:
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Amol Lad authored
ioremap must be balanced by an iounmap and failing to do so can result in a memory leak. Signed-off-by:
Amol Lad <amol@verismonetworks.com> Acked-by:
Karsten Keil <kkeil@suse.de> Signed-off-by:
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Andrew Morton authored
Qooting Adrian: - net/sunrpc/svc.c uses highest_possible_node_id() - include/linux/nodemask.h says highest_possible_node_id() is out-of-line #if MAX_NUMNODES > 1 - the out-of-line highest_possible_node_id() is in lib/cpumask.c - lib/Makefile: lib-$(CONFIG_SMP) += cpumask.o CONFIG_ARCH_DISCONTIGMEM_ENABLE=y, CONFIG_SMP=n, CONFIG_SUNRPC=y -> highest_possible_node_id() is used in net/sunrpc/svc.c CONFIG_NODES_SHIFT defined and > 0 -> include/linux/numa.h: MAX_NUMNODES > 1 -> compile error The bug is not present on architectures where ARCH_DISCONTIGMEM_ENABLE depends on NUMA (but m32r isn't the only affected architecture). So move the function into page_alloc.c Cc: Adrian Bunk <bunk@stusta.de> Cc: Paul Jackson <pj@sgi.com> Signed-off-by:
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Zachary Amsden authored
Interrupts must be disabled during alternative instruction patching. On systems with high timer IRQ rates, or when running in an emulator, timing differences can result in random kernel panics because of running partially patched instructions. This doesn't yet fix NMIs, which requires extricating the patch code from the late bug checking and is logically separate (and also less likely to cause problems). Signed-off-by:
Zachary Amsden <zach@vmware.com> Signed-off-by:
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Al Viro authored
We are using NFS_REPLAY_ME as a special error value that is never leaked to clients. That works fine; the only problem is mixing host- and network- endian values in the same objects. Network-endian equivalent would work just as fine; switch to it. Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk> Acked-by:
Trond Myklebust <trond.myklebust@fys.uio.no> Acked-by:
Neil Brown <neilb@suse.de> Signed-off-by:
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Al Viro authored
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Al Viro authored
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Al Viro authored
don't use the same variable to store NFS and host error values Signed-off-by:
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Al Viro authored
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Al Viro authored
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Al Viro authored
don't use the same variable to store NFS and host error values Signed-off-by:
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Al Viro authored
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Al Viro authored
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Al Viro authored
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Al Viro authored
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Al Viro authored
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Al Viro authored
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Al Viro authored
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Al Viro authored
[pulled from Alexey's patch] Signed-off-by:
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Al Viro authored
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Al Viro authored
on-the-wire data is big-endian [mostly pulled from Alexey's patch] Signed-off-by:
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Al Viro authored
[pulled from Alexey's patch] Signed-off-by:
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Al Viro authored
on-the-wire data is big-endian [in large part pulled from Alexey's patch] Signed-off-by:
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Al Viro authored
on-the-wire data is big-endian [in large part pulled from Alexey's patch] Signed-off-by:
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Al Viro authored
on-the-wire data is big-endian [in large part pulled from Alexey's patch] Signed-off-by:
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Al Viro authored
on-the-wire data is big-endian [in large part pulled from Alexey's patch] Signed-off-by:
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Al Viro authored
Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
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Al Viro authored
svc_procfunc instances return __be32, not int Signed-off-by:
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Al Viro authored
a) ERR_PTR(nfserr_something) is a bad idea; IS_ERR() will be false for it. b) mixing nfserr_.... with -EOPNOTSUPP is even worse idea. nfsd4_path() does both; caller expects to get NFS protocol error out it if anything goes wrong, but if it does we either do not notice (see (a)) or get host-endian negative (see (b)). IOW, that's a case when we can't use ERR_PTR() to return error, even though we return a pointer in case of success. Signed-off-by:
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Chuck Lever authored
Yes, this actually passed tests the way it was. Signed-off-by:
Chuck Lever <chuck.lever@oracle.com> Signed-off-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by:
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Chuck Lever authored
When submitting a request to a fast portmapper (such as the local rpcbind daemon), the request can complete before the parent task is even queued up on xprt->binding. Fix this by queuing before submitting the rpcbind request. Test plan: Connectathon locking test with UDP. Signed-off-by:
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Chuck Lever authored
Coverity spotted a superfluous error check in nfs4_open_revalidate(). Remove it. Coverity: #cid 847 Test plan: Code inspection; another pass through Coverity. Signed-off-by:
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Chuck Lever authored
The "!inode" check in __nfs_revalidate_inode() occurs well after the first time it is dereferenced, so get rid of it. Coverity: #cid 1372, 1373 Test plan: Code review; recheck with Coverity. Signed-off-by:
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Chuck Lever authored
The original code confused a zero return code from pagevec_add() as success. Test plan: None. Signed-off-by:
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Trond Myklebust authored
If invalidate_inode_pages2() fails, then it should in principle just be because the current process was signalled. In that case, we just want to ensure that the inode's page cache remains marked as invalid. Also add a helper to allow the O_DIRECT code to simply mark the page cache as invalid once it is finished writing, instead of calling invalidate_inode_pages2() itself. Signed-off-by:
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Trond Myklebust authored
The change in semantics for nfs_find_client() introduced by David breaks the NFSv4 callback channel. Also, replace another completely broken BUG_ON() in nfs_find_client(). In initialised clients, clp->cl_cons_state == 0, and callers of that function should in any case never want to see clients that are uninitialised. Signed-off-by:
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J. Bruce Fields authored
David forgot to do this. I'm not sure if this is the right place to put it.... Signed-off-by:
J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by:
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Trond Myklebust authored
If the RPC call tanked, we should not be checking the return value of data->res.verf->committed, since it is unlikely to even be initialised. Signed-off-by:
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Trond Myklebust authored
Fix two bugs: - nfs_inode_remove_request will call nfs_clear_request, so we cannot reference req->wb_page after it. Move the call to dec_zone_page_state so that it occurs while req->wb_page is still valid. - Calling nfs_clear_page_writeback is unnecessary since the radix tree tags will have been cleared by the call to nfs_inode_remove_request. Replace with a simple call to nfs_unlock_request. Signed-off-by:
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