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Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , open list , "open list:MEMORY MANAGEMENT - CORE" Cc: jyescas@google.com, android-mm@google.com, fvdl@google.com, tkjos@google.com, minchan@google.com, dskiba@google.com, open list , "open list:MEMORY MANAGEMENT - CORE" Content-Type: text/plain; charset="UTF-8" X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 1CE801C0003 X-Stat-Signature: 3p9tzzqhx57rwwwx99f9fk1o4tddpfon X-HE-Tag: 1784793056-458809 X-HE-Meta: U2FsdGVkX1/cqCFxGmv5JHJpkUAQj3Fgm7auBvOH5GrmSEcUzELUmIbKJNUkS0PnvdOvX9sbNLinN3Tjnmddk2qnXt8TaNSpU4X6EQrDGwy+CIsXTMFw6+6bTghbMz6MPANx4gaz5ZZcuV1nZmUFfD5QlN47giABYG7RbuL3l6xBOx387sYBuspR4Tu6oeQ9BBP8utqXaIwMOXccUA8Ey6E3fTAq+1ahxZe9jCFVknqb34Yw8ZFC7FPSlhj20e5c2ch3qhaAUyXfIHk7Ba7xuKRkRAyc586KrciFxL4uDRtftuDkh2sDU4WV5A5hg4WMXj2Wxxy/yDFlV2yMIiswJRtMucrVo7Eh8NwOf4VnqK45fNwTWYngLl7CoWb7sKXsajHe/bh4QDFC3MzdVOF8ZC1jROaEqDl96mlDc15JLrNFQScC3lJ96JCMb7gVZJG+g6EKKnUNFQ9DmGsBtpbyPA1OaUN2bNAH81HNtkp896jlJnoAE3nyHnhHA669+ylJQsFITpv7qAwktawESbC7Xuz1AAliPdr+Y6s8ZbQ/x5kscMRfVe2F7IUYdY+NGlx9J5AZkD1slDQ+mQKQymkzQhcoCyMQr5UD2zPSRIu+qCBmKUh78jmC1P6w7TRRTZbopwj1AtodMsfL1ZozrDCw3qO/71bmElCDgaAS2q38JpSU4+sTrI82Nx+aRhxR572e4w/qlu0uhCclOOCYW6uBCvP7dR7t4U/ckSEXkk93skGyZMpumPTrbvblbHF3NfGOHWPpKNmKudPkdJp06bGB6RubSsneovToBioBa7GYYUdVUx6j7GyQ/uO3RnN77tiFzGTMOXSZbexoZgsYJgNIRSxTMj8rqbCk/ItE7Oxmv9NWBqv+lfZVtC4QFFoOfxFbYomposM0PuNRWaxVtG5ijzBsQgmfvrisbnYL+BkkGRD1cSIEWq6vCggKciAdqrfPsBKRVXDC+seRJGYutc0 Yp81ARc2 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: This change creates the file asociated with an allocation. The name of the file will be given by incrementing the atomic long "allocs_file_seq". This file will be used to free the alocation when the user requests it. Signed-off-by: Juan Yescas --- mm/page_alloc_hogger.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/mm/page_alloc_hogger.c b/mm/page_alloc_hogger.c index 7f6eebdd5197..203b71a25e64 100644 --- a/mm/page_alloc_hogger.c +++ b/mm/page_alloc_hogger.c @@ -186,12 +186,26 @@ inline void set_migrate_type_to_alloc_from(int migrate_type, gfp_t *flags_ptr) } } +static ssize_t page_alloc_read(struct file *file, char __user *ubuf, + size_t cnt, loff_t *ppos) +{ + /* Which information should be print about the page or allocation? */ + return 0; +} + +static const struct file_operations page_alloc_fops = { + .owner = THIS_MODULE, + .open = simple_open, + .read = page_alloc_read, +}; + static int make_alloc(struct req_alloc *req, gfp_t flags, unsigned long *alloc_id) { struct page_alloc *pa; struct page *page; char new_alloc_name[12]; + struct dentry *new_alloc_dentry; int ret; page = alloc_pages_node_noprof(req->node_idx, flags, req->order); @@ -210,14 +224,26 @@ static int make_alloc(struct req_alloc *req, snprintf(new_alloc_name, sizeof(new_alloc_name), "%lu", *alloc_id); + new_alloc_dentry = debugfs_create_file( + new_alloc_name, 0644, req->parentdir, + pa, &page_alloc_fops); + if (IS_ERR(new_alloc_dentry)) { + ret = PTR_ERR(new_alloc_dentry); + goto erase_xa_entry; + } + pa->req_alloc = req; pa->page = page; + pa->alloc_dentry = new_alloc_dentry; } else { return -ENOMEM; } return 0; +erase_xa_entry: + xa_erase(&allocs_xa, *alloc_id); + free_page_alloc: kmem_cache_free(page_alloc_cache, pa); -- 2.55.0.229.g6434b31f56-goog